docs(progress): DMS Vorbestand-Bugs ×4 behoben dokumentiert — 129/129 grün

fix(dms-tests): multiple_files variierter Upload-Inhalt gemäß Dokumentkonvention (freigegeben)
Der Test lud 3x byteidentisches PDF_CONTENT und erwartete dennoch 3 Dateien — Kollision mit dem bewussten content_hash-Dedup-Feature (routes.py Z.145-160, inkl. Storage-Bereinigung des Duplikats). docs/test-strategy.md-Konvention angewendet: unterschiedlichen Inhalt je Upload. Jetzt PDF_CONTENT + str(i).encode(). Produktionscode unverändert, Dedup bleibt vollständig aktiv.
2026-08-27 00:40:37 +02:00 · 2026-08-27 00:40:36 +02:00 · 2026-08-26 23:17:38 +02:00 · 2026-08-26 22:03:07 +02:00 · 2026-08-26 22:02:32 +02:00 · 2026-08-26 14:34:10 +02:00
220 changed files with 13697 additions and 13523 deletions
@@ -39,8 +39,8 @@ RUN apt-get update \

 WORKDIR /app

-COPY requirements.txt .
-RUN pip install --user --no-cache-dir -r requirements.txt
+COPY requirements.txt requirements.lock ./
+RUN pip install --user --no-cache-dir -r requirements.lock

 # === Stage 2: Runtime ===
 FROM python:3.12-slim AS runtime
@@ -1210,6 +1210,370 @@ Trigger / Event / Cron / Webhook / Agent

 ---

+## Phase L — UI-Overhaul (Status: geplant, NICHT gestartet)
+
+> **Herkunft:** Am 2026-08-25 aus der eigenständigen Datei `UI_OVERHAUL_PLAN.md`
+> hier integriert - gemaess AGENTS.md-Regel "PLATFORM_ROADMAP.md ist EINZIGE
+> Planungs-Datei". Vollständiges Original inkl. ASCII-Mockups abrufbar via
+> `git show c807aac:UI_OVERHAUL_PLAN.md`.
+>
+> **Konflikt-Notiz (2026-08-25, Block I-D):** Phase 2 unten sieht "AI Assistant
+> Page entfernen" vor. Die Seite wurde jedoch in Commit 962e0ee bewusst GEBAUT,
+> um die Geister-Route /ai-assistant zu reparieren (im Backend-Manifest
+> referenziert, aber nicht existent -> ErrorBoundary in Production). VOR
+> Umsetzung von Phase 2 neu entscheiden: (a) Seite doch entfernen - dann auch
+> Manifest-Route entfernen, oder (b) Phase 2 verwerfen zugunsten der aktuellen
+> Architektur. Bitte nicht unkommentiert ausfuehren.
+
+> **Erstellt:** 2026-08-21
+> **Aktualisiert:** 2026-08-21 — AI Assistent Integration hinzugefügt
+> **Status:** Planung — nicht gestartet
+> **Leitlinie:** Auf bestehendem Code aufbauen, 3-Spalten-Explorer-Layout als Standard, keine parallelen Systeme
+
+---
+
+### Standard-Layout (Referenz: ContactsList.tsx)
+
+Alle Explorer-Plugins nutzen das 3-Spalten-Layout aus den UI-Design-Guidelines:
+
+```
+┌─────────────┬──────────────────┬──────────────────────┐
+│   Tree      │   Liste/Ansicht   │   Detail             │
+│  (224px)    │   (flex-1)        │   (flex-1 / 60%)     │
+│ ResizablePanel│  ResizablePanel   │   ResizablePanel     │
+└─────────────┴──────────────────┴──────────────────────┘
+```
+
+- **Toolbar oben:** PluginToolbar mit Filter-Dropdowns, Ansichts-Umschaltern, Aktion-Buttons
+- **Linke Spalte:** ResizablePanel mit Baumansicht (Ordner, Kategorien, Kalender)
+- **Mitte:** Liste, Karten, Kalender-Ansicht — mehrere Ansichten umschaltbar
+- **Rechts:** Detail-Bereich für ausgewähltes Element
+
+---
+
+### Phase 1: Echte Bugs fixen (2-3 Tage)
+
+#### 1.1 Kontakte — Liste aktualisiert nach Speichern nicht
+- **Datei:** `frontend/src/pages/ContactsList.tsx`
+- **Problem:** Nach dem Speichern eines Kontakts wird die Liste nicht aktualisiert
+- **Ursache:** Wahrscheinlich fehlendes `invalidateQueries` nach Mutation
+- **Fix:** TanStack Query `useCreateContact` mutation muss `queryClient.invalidateQueries({ queryKey: ['contacts'] })` im `onSuccess` haben
+- **Aufwand:** 1 Stunde
+
+#### 1.2 Kontakte — Drag-Drop von Kontakten in Ordner nicht möglich
+- **Datei:** `frontend/src/pages/ContactsList.tsx`, `frontend/src/components/contacts/`
+- **Problem:** Drag-Drop von Kontakten in Ordner funktioniert nicht
+- **Fix:** HTML5 Drag-Drop API auf Tree-Nodes implementieren, `onDrop` handler der `updateContact({ folder_id })` aufruft
+- **Aufwand:** 3 Stunden
+
+#### 1.3 Kontakte — Verschieben-Dialog funktioniert nicht
+- **Datei:** `frontend/src/components/contacts/MoveDialog.tsx` (oder ähnlich)
+- **Problem:** Ordner-Auswahl im Verschieben-Dialog leer oder broken
+- **Fix:** Ordner-API aufrufen und im Dialog anzeigen, Auswahl speichern
+- **Aufwand:** 2 Stunden
+
+#### 1.4 Wiki — Artikel kann nicht gespeichert werden
+- **Datei:** `frontend/src/pages/Wiki.tsx`, `frontend/src/api/knowledge.ts`
+- **Problem:** Speichern-Button funktioniert nicht oder API gibt Fehler zurück
+- **Diagnose:** API-Endpunkt prüfen (`POST /api/v1/wiki/articles` oder `PATCH /api/v1/wiki/articles/:id`), Frontend-Mutation prüfen
+- **Fix:** Je nach Diagnose — API-Fehler oder Frontend-Mutation-Fehler
+- **Aufwand:** 2 Stunden
+
+#### 1.5 Kalender — Dialog schließt nicht nach Speichern
+- **Datei:** `frontend/src/pages/Calendar.tsx`, `frontend/src/components/calendar/AppointmentEditForm.tsx`
+- **Problem:** Nach dem Speichern eines Termins schließt sich der Dialog nicht
+- **Fix:** `onSuccess` handler muss `setEditingEvent(null)` oder `setShowDialog(false)` aufrufen
+- **Aufwand:** 30 Minuten
+
+#### 1.6 Kommunikation — Chats können nicht angelegt werden
+- **Datei:** `frontend/src/pages/Communication.tsx`
+- **Problem:** "Neuer Chat" Button funktioniert nicht oder API gibt Fehler
+- **Diagnose:** API-Endpunkt prüfen (`POST /api/v1/comm/conversations`), Frontend-Mutation prüfen
+- **Fix:** Je nach Diagnose
+- **Aufwand:** 2 Stunden
+
+#### 1.7 Wiki — Doppelt im Menü
+- **Datei:** `frontend/src/routes/index.tsx`, `frontend/src/components/layout/` (Navigation)
+- **Problem:** Wiki erscheint zweimal im Menü
+- **Diagnose:** Route `/wiki` und möglicherweise Help-Subroute oder Plugin-Route
+- **Fix:** Doppelte Route entfernen
+- **Aufwand:** 30 Minuten
+
+**Gesamtaufwand Phase 1:** ~13 Stunden (2-3 Tage)
+
+---
+
+### Phase 2: AI Assistent in Kommunikation integrieren (2-3 Tage)
+
+#### Problem
+Der AI Assistent ist ein paralleles System das die Kommunikation-Plattform dupliziert:
+- **AI Assistant Tabellen:** `ai_conversations`, `ai_messages` (app/models/ai_conversation.py) + `ai_chat_sessions`, `ai_chat_messages`, `ai_chat_attachments` (app/plugins/builtins/ai_assistant/models.py) — 5 Tabellen
+- **AI Assistant Frontend:** `AIAssistant.tsx`, `AIAssistantStandalone.tsx`, `SessionList.tsx`, `ChatWindow.tsx` — eigene UI
+- **AI Assistant API:** `/api/v1/ai/sessions`, `/api/v1/ai/sessions/:id/messages`, `/api/v1/ai/sessions/:id/stream` — eigene API
+- **Kommunikation hat schon AI-Chat:** `comm_conversations` mit `conversation_type='ai'`, `streamChat()` aus `@/api/ai`, `categorizeConversation()` mit 'KI Chats' Kategorie, `new-ai-chat` Toolbar-Button
+
+#### 2.1 Daten-Migration (Backend)
+- **Migration 0137:** Migriere `ai_chat_sessions` → `comm_conversations` (conversation_type='ai')
+  - `ai_chat_sessions.id` → `comm_conversations.id`
+  - `ai_chat_sessions.title` → `comm_conversations.title`
+  - `ai_chat_sessions.tenant_id` → `comm_conversations.tenant_id`
+  - `ai_chat_sessions.user_id` → `comm_conversations.owner_id`
+  - `ai_chat_sessions.agent_id` → `comm_conversations.metadata.agent_id`
+  - `ai_chat_sessions.created_at` → `comm_conversations.created_at`
+- **Migration 0137:** Migriere `ai_chat_messages` → `comm_messages`
+  - `ai_chat_messages.id` → `comm_messages.id`
+  - `ai_chat_messages.session_id` → `comm_messages.conversation_id`
+  - `ai_chat_messages.role` → `comm_messages.sender_type` ('user' → 'user', 'assistant' → 'ai')
+  - `ai_chat_messages.content` → `comm_messages.content`
+  - `ai_chat_messages.tenant_id` → `comm_messages.tenant_id`
+- **Migration 0137:** Migriere `ai_conversations` → `comm_conversations` (falls Daten vorhanden)
+- **Migration 0137:** Migriere `ai_messages` → `comm_messages` (falls Daten vorhanden)
+- **Migration 0137:** Drop `ai_conversations`, `ai_messages`, `ai_chat_sessions`, `ai_chat_messages`, `ai_chat_attachments` Tabellen
+- **Aufwand:** 1 Tag
+
+#### 2.2 Backend — AI Chat API auf Communication umleiten
+- **Datei:** `app/plugins/builtins/ai_assistant/routes.py`
+- **Änderung:** `POST /api/v1/ai/sessions` → erstellt `comm_conversations` mit `conversation_type='ai'` statt `ai_chat_sessions`
+- **Änderung:** `GET /api/v1/ai/sessions/:id/messages` → liest aus `comm_messages` statt `ai_chat_messages`
+- **Änderung:** `POST /api/v1/ai/sessions/:id/stream` → bleibt erhalten (streaming endpoint) aber speichert messages in `comm_messages`
+- **Aufwand:** 4 Stunden
+
+#### 2.3 Frontend — AI Assistant Page entfernen
+- **Entfernen:** `frontend/src/pages/AIAssistant.tsx`
+- **Entfernen:** `frontend/src/pages/AIAssistantStandalone.tsx`
+- **Entfernen:** `frontend/src/components/ai/SessionList.tsx`
+- **Entfernen:** `frontend/src/components/ai/ChatWindow.tsx`
+- **Route anpassen:** `/ai-assistant` → **gelöscht** (kein Redirect nötig)
+- **Route anpassen:** `/ai-assistant-standalone` → **gelöscht** (kein Redirect nötig)
+- **Navigation:** AI Assistent Menüpunkt entfernen, AI Chat bleibt unter Kommunikation
+- **Aufwand:** 2 Stunden
+
+#### 2.4 Frontend — Communication AI-Chat verbessern
+- **Datei:** `frontend/src/pages/Communication.tsx`
+- **Änderung:** AI Chat Sessions aus `comm_conversations` laden (statt `ai/sessions` API)
+- **Änderung:** `streamChat()` bleibt erhalten aber Session-ID ist jetzt `comm_conversation_id`
+- **Änderung:** AI Chat Messages aus `comm_messages` laden
+- **Aufwand:** 4 Stunden
+
+#### 2.5 Backend — ai_assistant plugin models aufräumen
+- **Entfernen:** `AIChatSession`, `AIChatMessage`, `AIChatAttachment` Models aus `app/plugins/builtins/ai_assistant/models.py`
+- **Entfernen:** `AIConversation`, `AIMessage` Models aus `app/models/ai_conversation.py`
+- **Behalten:** `AIProvider`, `AIModel`, `AIPreset`, `AIChatFolder` Models (für Settings)
+- **Behalten:** `ai_assistant` plugin routes für Settings (providers, models, presets)
+- **Aufwand:** 2 Stunden
+
+#### 2.6 Unified Search — AI Chat Provider anpassen
+- **Datei:** `app/plugins/builtins/unified_search/providers/ai_chat_provider.py`
+- **Änderung:** Search auf `comm_messages` (conversation_type='ai') statt `ai_chat_messages`
+- **Aufwand:** 1 Stunde
+
+**Gesamtaufwand Phase 2:** ~2-3 Tage
+
+---
+
+### Phase 3: Wiki UI-Überarbeitung (3-4 Tage)
+
+#### 3.1 WYSIWYG Editor
+- **Datei:** `frontend/src/components/wiki/WikiEditor.tsx` (neu zu bauen)
+- **Anforderung:** WYSIWYG Editor mit allen Möglichkeiten, wie Notion — Bedienelemente über dem Textblock
+- **Technologie:** Tiptap (ProseMirror-basiert, React-integration, Notion-ähnliche UX)
+  - `@tiptap/react`, `@tiptap/starter-kit`, `@tiptap/extension-*`
+  - Floating Toolbar über dem Textblock (wie Notion)
+  - Markdown-Export für Backend-Speicherung
+- **Aufwand:** 2 Tage
+
+#### 3.2 Wiki Layout — 3-Spalten
+- **Datei:** `frontend/src/pages/Wiki.tsx` (umbauen)
+- **Anforderung:** Toolbar oben, links Baummenü (Kategorien), Mitte Textbereich
+- **Aufbau:**
+  - **Toolbar:** View/Edit Mode Toggle (oben rechts), Suche, Neuer Artikel
+  - **Links:** WikiBrowser (existiert schon) — Baumansicht mit Kategorien
+  - **Mitte:** WYSIWYG Editor (Edit Mode) oder gerenderte Ansicht (View Mode)
+  - **Kein separater Detail-Bereich** — Artikel wird in der Mitte angezeigt
+- **Aufwand:** 1 Tag
+
+#### 3.3 View/Edit Mode Toggle
+- **Datei:** `frontend/src/pages/Wiki.tsx`
+- **Anforderung:** Button oben rechts in der Toolbar der zwischen View und Edit Mode wechselt
+- **Im Edit Mode:** WYSIWYG Editor mit Floating Toolbar
+- **Im View Mode:** Gerenderte Markdown-Ansicht (wie jetzt, aber schöner)
+- **Aufwand:** 2 Stunden
+
+**Gesamtaufwand Phase 3:** ~3-4 Tage
+
+---
+
+### Phase 4: Tasks UI-Überarbeitung (2-3 Tage)
+
+#### 4.1 Tasks Layout — 3-Spalten wie Kontakte
+- **Datei:** `frontend/src/pages/Tasks.tsx` (kompletter Umbau, 419 → ~600 Zeilen)
+- **Anforderung:** Linke Sidebar Baumansicht, Mitte Liste mit mehreren Ansichten, rechts Detailbereich
+- **Aufbau:**
+  - **Toolbar:** PluginToolbar mit Filter-Dropdowns (Status, Priorität, Zuweisung, Fällig), Ansichts-Umschalter (Liste/Kanban), Neuer Task
+  - **Links:** Baumansicht — nach Status (Offen/In Bearbeitung/Erledigt), nach Priorität, nach Zuweisung, nach Liste/Goal
+  - **Mitte:** Liste (Tabelle) oder Kanban-Board — umschaltbar
+  - **Rechts:** TaskDetail — ausgewählter Task mit Beschreibung, Subtasks, Zuweisung, Fälligkeit
+- **Aufwand:** 2-3 Tage
+
+**Gesamtaufwand Phase 4:** ~2-3 Tage
+
+---
+
+### Phase 5: Kalender UI-Überarbeitung (1 Tag)
+
+#### 5.1 Toolbar und Filter standardisieren
+- **Datei:** `frontend/src/pages/Calendar.tsx` (anpassen, 759 Zeilen)
+- **Problem:** Drucken-Button und Filter-Leiste über dem Kalender entsprechen nicht dem Standard
+- **Fix:**
+  - Filter in PluginToolbar als Dropdowns (wie Kontakte)
+  - Drucken-Button in PluginToolbar
+  - Ansichts-Umschalter (Tag/Woche/Monat/Range) in PluginToolbar
+- **Aufwand:** 4 Stunden
+
+#### 5.2 Kalender-Auswahl fixen
+- **Datei:** `frontend/src/components/calendar/CalendarTree.tsx`
+- **Problem:** Einzelnes An- und Abwählen von Kalendern funktioniert nicht richtig
+- **Fix:** Checkbox-Toggle Logik reparieren — `visibleCalendars` Set korrekt verwalten
+- **Aufwand:** 2 Stunden
+
+**Gesamtaufwand Phase 5:** ~1 Tag
+
+---
+
+### Phase 6: Tags Umstrukturierung (2 Tage)
+
+#### 6.1 Tags in Settings verschieben
+- **Datei:** `frontend/src/pages/Tags.tsx` → `frontend/src/pages/SettingsTags.tsx` (neu)
+- **Route:** `/settings/tags` statt `/tags`
+- **Anforderung:** Tags gehören in die Einstellungen, bei System
+- **Aufwand:** 2 Stunden
+
+#### 6.2 Tags Baumstruktur
+- **Datei:** `frontend/src/pages/SettingsTags.tsx` (neu)
+- **Anforderung:** Baumstruktur um Tags zu sortieren (Parent-Child Beziehung)
+- **Backend:** `tags` Tabelle braucht `parent_id` Spalte (Migration 0138)
+- **Frontend:** TreeView Komponente für Tags
+- **Aufwand:** 1 Tag
+
+#### 6.3 Pro Tag einstellbar wo er verfügbar ist
+- **Datei:** `frontend/src/pages/SettingsTags.tsx`, Backend `tags` Tabelle
+- **Anforderung:** Pro Tag einstellbar: Kontakte, Mail, Termin, Task, etc.
+- **Backend:** `tag_applications` Tabelle (tag_id, entity_type) oder JSON-Spalte `applicable_to` in tags (Migration 0138)
+- **Frontend:** Multi-Select im Tag-Editor
+- **Aufwand:** 4 Stunden
+
+#### 6.4 Symbol und Farbe pro Tag
+- **Datei:** `frontend/src/pages/SettingsTags.tsx`, Backend `tags` Tabelle
+- **Anforderung:** Symbol (Icon) und Farbe pro Tag einstellbar
+- **Backend:** `icon` Spalte in tags (Migration 0138), `color` existiert schon
+- **Frontend:** Icon-Picker und Color-Picker im Tag-Editor
+- **Aufwand:** 4 Stunden
+
+**Gesamtaufwand Phase 6:** ~2 Tage
+
+---
+
+### Phase 7: Reports UI-Überarbeitung (2 Tage)
+
+#### 7.1 Reports Layout — 3-Spalten wie Kontakte
+- **Datei:** `frontend/src/pages/Reports.tsx` (Umbau, 433 Zeilen)
+- **Anforderung:** Linke Sidebar mit Baumstruktur (Ordner zum Sortieren), Mitte verschiedene Ansichten (Liste/Karten), rechts Detailbereich
+- **Aufbau:**
+  - **Toolbar:** PluginToolbar mit Filter, Ansichts-Umschalter, Neuer Report
+  - **Links:** Baumansicht — nach Ordner/Gruppe sortierbar
+  - **Mitte:** Liste oder Karten-Ansicht — umschaltbar
+  - **Rechts:** ReportDetail — ausgewählter Report mit Vorschau
+- **Backend:** `reports` Tabelle braucht `folder_id` Spalte (Migration 0139) für Ordner-Sortierung
+- **Aufwand:** 2 Tage
+
+**Gesamtaufwand Phase 7:** ~2 Tage
+
+---
+
+### Phase 8: Kommunikation UI-Überarbeitung (2-3 Tage)
+
+#### 8.1 Baumstruktur verbessern und Ordner
+- **Datei:** `frontend/src/pages/Communication.tsx` (anpassen, 859 Zeilen)
+- **Anforderung:** Baumstruktur größer/übersichtlicher, Ordner für Chats
+- **Aufbau:**
+  - **Links:** Baumansicht mit Ordnern — System, AI, Kollegen, Custom Ordner
+  - **Baum breiter:** ResizablePanel `initialWidth=280` statt 224
+  - **Ordner:** `comm_conversation_folders` Tabelle oder `folder_id` in `comm_conversations` (Migration 0140)
+- **Aufwand:** 1-2 Tage
+
+#### 8.2 AI Chat in Kommunikation (nach Phase 2)
+- AI Chats werden als eigener Baum-Knoten 'KI Chats' in Communication angezeigt
+- Neuer AI Chat Button in Toolbar erstellt `comm_conversation` mit `conversation_type='ai'`
+- `streamChat()` wird aufgerufen mit `comm_conversation_id` als Session-ID
+- AI Messages werden in `comm_messages` gespeichert
+- **Aufwand:** in Phase 2
+
+**Gesamtaufwand Phase 8:** ~1-2 Tage (Phase 2 vorab)
+
+---
+
+### Phase 9: Strukturelle Änderungen (0.5 Tage)
+
+#### 9.1 System Dashboard als eigener Menüpunkt
+- **Datei:** `frontend/src/routes/index.tsx`, Navigation
+- **Problem:** System Dashboard ist unter Settings, soll eigener Punkt auf Startseite-Ebene sein
+- **Fix:** Route `/system-dashboard` existiert schon — muss in Navigation als Top-Level Menüpunkt angezeigt werden
+- **Aufwand:** 1 Stunde
+
+#### 9.2 Mail — Postfach mit IMAP anlegen testen
+- **Datei:** `frontend/src/pages/Mail.tsx`, `frontend/src/pages/MailSettings.tsx`
+- **Anforderung:** IMAP-Zugangsdaten testen — Postfach anlegen und prüfen ob Mails synchronisiert werden
+- **Aufwand:** 2 Stunden (Test + ggf. Bugfix)
+
+**Gesamtaufwand Phase 9:** ~0.5 Tage
+
+---
+
+### Phase-L-Phasenübersicht
+
+| Phase | Inhalt | Aufwand | Migration | Abhängigkeit |
+|-------|--------|---------|-----------|-------------|
+| 1 | Echte Bugs fixen | 2-3 Tage | Keine | Keine |
+| 2 | AI Assistent → Kommunikation | 2-3 Tage | 0137 | Phase 1.6 |
+| 3 | Wiki UI + WYSIWYG | 3-4 Tage | Keine | Phase 1.4 |
+| 4 | Tasks UI neu | 2-3 Tage | Keine | Keine |
+| 5 | Kalender UI | 1 Tag | Keine | Phase 1.5 |
+| 6 | Tags Umstrukturierung | 2 Tage | 0138 | Keine |
+| 7 | Reports UI | 2 Tage | 0139 | Keine |
+| 8 | Kommunikation UI | 1-2 Tage | 0140 | Phase 2 |
+| 9 | Strukturelle Änderungen | 0.5 Tage | Keine | Keine |
+
+**Gesamtaufwand:** ~17-22 Tage
+
+#### Reihenfolge:
+1. **Phase 1** (Bugs) — zuerst, damit grundlegende Funktionen arbeiten
+2. **Phase 9** (Strukturelle Änderungen) — schnell, wenig Aufwand
+3. **Phase 5** (Kalender) — kleines Update, baut auf Phase 1 auf
+4. **Phase 2** (AI Assistent → Kommunikation) — entfernt paralleles System, baut auf Phase 1.6 auf
+5. **Phase 6** (Tags) — unabhängig, Backend + Frontend
+6. **Phase 4** (Tasks) — großer Umbau, unabhängig
+7. **Phase 3** (Wiki) — größter Umbau (WYSIWYG Editor), baut auf Phase 1 auf
+8. **Phase 7** (Reports) — großer Umbau, unabhängig
+9. **Phase 8** (Kommunikation) — baut auf Phase 2 auf
+
+#### Migrationen:
+- **0137:** AI Assistent Tabellen → comm_conversations/comm_messages + Drop alte Tabellen
+- **0138:** Tags: parent_id, applicable_to, icon Spalten
+- **0139:** Reports: folder_id Spalte
+- **0140:** Communication: comm_conversation_folders Tabelle oder folder_id in comm_conversations
+
+#### Was ich NICHT tun werde:
+- Keine Massen-Scripts die neue Fehler verursachen
+- Keine Änderungen ohne Verifizierung gegen Produktion
+- Keine neuen Plugins wenn bestehende erweitert werden können
+- Keine neuen Pages wenn bestehende umgebaut werden können
+- Jede Änderung wird mit tsc und API-Test verifiziert
+
+#### Was ich brauche:
+- **IMAP-Zugangsdaten:** Für Mail-Postfach-Test (Phase 9.2)
+
+---
+
 ## Zusammenfassung

 | Phase | Dauer | Hauptdeliverable |
@@ -6,6 +6,158 @@

 ---

+## Architektur-Reparatur (2026-08-23, laufend)
+
+**Plan:** docs/fix-plan-v3.md · **Sequenz:** Block 0 + Block H gemerged in main, Block A läuft auf main
+**Stand:** 18 Findings geschlossen (~30% aufwandsgewichtet) · App startbar · 90+ Tests grün · tsc clean · Checker 14→6 Verstöße · Alles gepusht auf Forgejo
+
+| Finding | Beschreibung | Status | Commit |
+|---|---|---|---|
+| SYNTAX-001 | automation/plugin.py SyntaxError — App startet nicht | ✅ gefixt | 8077595 |
+| CHECK-002 | Checker crasht bei relativen Pfaden | ✅ gefixt | 35e2cc8 |
+| ARCH-010 | Checker scannt nur builtins | ✅ Vollscan-Default | 35e2cc8 |
+| ARCH-014 | Contract-Lazy-Resurrect nach unregister | ✅ gefixt + Funktionstest | b04cda7 |
+| ARCH-020 | EventBus subscribe ohne Duplikat-Check | ✅ gefixt + Funktionstest | b04cda7 |
+| ARCH-029/041 | trigger_dispatcher None-Check nach Verwendung | ✅ None-Check zuerst | b04cda7 |
+| ARCH-001 | Permissions nach on_activate registriert | ✅ Reihenfolge gedreht | 1d6152f |
+| ARCH-002 | on_activate pro Tenant mehrfach | ✅ 1× pro Prozess | 1d6152f |
+| ARCH-003 | active-manifests an plugins:read gebunden | ✅ für eingeloggte User offen | 982b4c9 |
+| ARCH-038 | BasePlugin.register_event_handlers fehlt | ✅ Hook ergänzt | 90a3670 |
+| ARCH-054 | entity_permissions falsche Datenstruktur | ✅ Model-Lookup korrigiert | 90a3670 |
+| ARCH-047 | SearchContract-Import kaputt (search-Step ImportError) | ✅ gefixt | d87fc4e |
+| ARCH-030 | contract.get_function() existiert nicht | ✅ auf 5 Contracts ergänzt | d87fc4e |
+| ARCH-031 | knowledge/plugin.py uuid nicht importiert | ✅ mitfixt | 1f4a621 |
+| ARCH-040/046/049 | Core→Plugin-Imports (worker/compliance/engine) | ✅ via Contract/Plugin-Job | 44511a8 + a7699d3 |
+| HC-F Frontend | BlockRenderer: 14 hardcodierte Blocks | ✅ Registry | b7ad529 |
+| HC-G Frontend | AISidebar: 5 hardcodierte Tabs | ✅ Tab-Registry | 59fdb61 |
+| HC-A Backend | action_mapper feste Regex-Intents | ✅ Contribution-API | 4994906 |
+| Gate H | Plugin-Contribution ohne Core-Änderung beweisen | ✅ BESTANDEN (2/2) | 801743b |
+
+| ARCH-043 | automation Tenant.limit(1) statt System-Tenant | ✅ get_system_tenant() + system_tenant_slug Setting | 17516d2 |
+| ARCH-052 | storage get_file_metadata Event-Loop im async Kontext | ✅ get_file_metadata_async() + Fail-Fast-Guard | 17516d2 |
+| ARCH-008 | Permission-Namensschema inkonsistent | ✅ Kanon modul:aktion festgelegt, Manifest-Validator erzwingt es | 7953077 |
+| ARCH-009 | Tote 3-Segment-Rollen-Patterns (core:*:X) + 14 Route-Literals | ✅ Migration 0141 + Route-Fix, Roundtrip bewiesen | 7953077 |
+
+| ARCH-012 | wiki/knowledge on_deactivate unvollständig | ✅ Provider-Dereg + 2 latente Bugs (register_provider fehlte am Contract, kaputter Modul-Import) behoben | c21634b |
+| ARCH-013 | self_improvement Fallback-Import; Benachrichtigung war tot | ✅ Contract-only; undefinierten KommunikationContract-Verweis behoben | c21634b |
+| ARCH-015 | Notification-Sync fehlt in Deactivate-Sequenz | ✅ sync_notification_types nach Status-Update | c21634b |
+| ARCH-033 | comm_websocket/comm_miniapps bleiben im Container | ✅ Container-Cleanup VOR super(); ServiceContainer.remove() ergänzt | c21634b |
+| ARCH-034/035 | self_improvement/marketplace Contract-Unregister | ✅ verifizierte No-Ops: beide registrieren keinen Contract | c21634b |
+| ARCH-036 | mail _auto_sync_task Klassenvariable | ✅ Instanzvariable via __init__ | c21634b |
+| ARCH-037 | graph_rag Registrierung VOR super() | ✅ Reihenfolge umgestellt | c21634b |
+| ARCH-044 | ai_ui_control remove() NACH super() | ✅ Reihenfolge umgestellt; fehlendes ServiceContainer.remove() ergänzt | c21634b |
+| Gate A | Block-A-Abschlussprüfung | ✅ BESTANDEN (4/4): Imports, Lifecycle-Symmetrie, Activate-Once, Contract-Roundtrip | 32f63ad |
+
+| B1 | Contacts-Domain aus Core entkoppelt: 4 Router ins Plugin verschoben, manifest.routes mit require_active_plugin-Schutz | ✅ Endpoint-Diff 409/0/0/0 identisch; Acceptance-grep fachfrei; 9 verbleibende Test-Failures als Vorbestand bewiesen (Stash-Test auf 5cee78c) | 5ad107f |
+| B2 | Alle Cross-Plugin-Imports eliminiert: worker/agent_runner/workstream über Contracts, wiki-Deklaration | ✅ Scan 458 Dateien / 0 Verstöße (Gate-B-Check 5) | 7467c01 |
+| B3 | ARCH-016 dynamische Entity-Registry (/registry generiert aus ENTITY_MODELS), ARCH-017 custom_fields-Permissions entkoppelt, ARCH-022 Write-Perms aus Registry generiert | ✅ Funktionstests + 23 Regressionen grün | e3fb472 |
+| Gate-B-2 | Fresh-DB-Install: 7 Alembic-Migrationen konditional geguardet + 6 Plugin-Konvergenzmigrationen (ai_assistant/automation/kommunikation/report_generator/tags/tasks) | ✅ Alembic 0001→0141 komplett auf leerer DB; Plugin-Pfad 25/25 installiert+aktiviert; Schema-Konvergenz 8/8 bewiesen | ad7c763 |
+| Gate-B-1/4 | Neues-Plugin ohne Core-Änderung (Inline-Route+Entity) + Dependency-Blockade bei Deaktivierung | ✅ Beide Funktionstests grün | d243420 |
+| Latenter Bug | knowledge.on_activate importierte register_action als Modulfunktion (existiert nur als Registry-Methode) — Knowledge-Hooks wurden NIE registriert | ✅ get_hook_registry().register_action umgestellt | d243420-Vorbereitung |
+| C1 | Permission-Felder auf FrontendMenuItem/FrontendPageRoute + Manifest-Migration aller 10 Plugins | ✅ Felder fließen durch active-manifests; Default leer = auth-only | 5e9be25 |
+| C2 | ARCH-004: Workspace visibleModuleKeys filtert is_visible=false | ✅ tsc clean; Server lieferte Feld bereits, Store filterte nicht | 4bce89a |
+| C3 | ARCH-019: Statische Chunk-Map für Plugin-Komponenten (22 Seiten) statt @vite-ignore-Runtime-Import | ✅ Production-Build exit=0; Plugin-Seiten als separate Chunks; 2 Geister-Komponenten-Findings dokumentiert | b01b756 |
+| C4 | ARCH-006: PluginRouteRenderer erzwingt Manifest-Permission via ProtectedRoute | ✅ tsc clean; 5 Renderer-Tests grün | 067fc13 |
+| C5 | ARCH-021: System-Dashboard-Navigation nur für System-Admins (Backend require_admin) | ✅ tsc clean | 9e84c40 |
+| C6 | Settings-Plugin-Seiten permission-gefiltert (fail-closed); Label-Dedup-Hack entfernt | ✅ tsc clean | dff97f5 |
+| C7 | Dashboard-Widgets als Plugin-Contributions (contacts/tasks/calendar) + Contact-Counts über neuen ContactsContract | ✅ Contract exponiert get_counts; dashboard.py ohne Contact-Model-Import | cad7d08 |
+| C8 | ARCH-062 SharedTeamPanel (AISidebar+MessageSidebar konsolidiert); ARCH-063 ICON_MAP statt Wildcard-Import (OOM-Fix) | ✅ tsc clean | b8b8ef1 |
+| Gate-C-4 | Permission-Diff statisch vs. Manifest | ✅ KEIN Absinken auf auth-only: 2 tote Guards korrigiert (communication:read→comm:read, workflows:read→automation:read), 2 Präzisierungen (import_export:read, mail:config strenger) | — |
+| D2-1 | DT-001-Familie: 6× datetime.utcnow() → datetime.now(UTC) (worker ×2, audit, webhook_service inkl. Inline-Hack bereinigt, backup_service, mcp_client); 0 utcnow verbleibend | ✅ Syntaxchecks + App-Import OK; Wire-Format des Webhooks unverändert (isoformat+Z) | d89044d |
+| D2-2 | SQLITE-001: automation tests von SQLite in-memory auf ephemeres PostgreSQL umgestellt (CREATE/DROP pro Lauf, pgvector-Extension, komplettes Model-Discovery für cross-plugin FKs) | ✅ 30/30 Tests grün; dabei 3 Testlogik-Bugs gefixt: DryRun-FK (echte Automation vor Run), Rate-Limit-Assertion-Richtung (< → >=), Budget-Float approx | d89044d |
+| D1-a | test_auth 10/10, test_abac komplett grün — kein Handlungsbedarf | ✅ Verifiziert gegen .env.test | — |
+| D1-b | ContactCreate-Typ-Inferenz: Person-Payloads ohne explizites `type` wurden durch BUG-008-Validator (dada44c) als Firma abgelehnt → 422 → KeyError 'id' in 3 Company-Tests + 9 Contact-Vorbeständen | ✅ Typ-Inferenz bei fehlendem type (firstname/surname→person); test_companies 18/18, test_contacts 8/8 | 9d8da99 |
+| D1-c | Calendar-Suite: 34 Setup-ERRORS 'NameError CalendarPlugin' — abbe7a1 hatte Import aus conftest.py entfernt, Nutzung blieb (Zeile 661) | ✅ Import wiederhergestellt an Originalposition; test_calendar 34/34 grün | f6e117b |
+| D1-d | ai_proactive Produktionsbug: 4 Stellen nutzten snake_case-Attribute auf CalendarContract (`_cal.calendar_entry`), Contract exponiert PascalCase-Klassenattribute → AttributeError zur Laufzeit (get_open_tasks_handler, gather_context ×2, mail→calendar Konversion) | ✅ Auf `_cal.CalendarEntry`/`CalendarEntryLink`/`Calendar` umgestellt; 5 ai_proactive-Failures behoben | f6e117b |
+| D1-e | 2 stale Rate-Limit-Tests mockten entferntes services.get_cache (bb36378 zentralisierte Rate-Limiting auf check_rate_limit) | ✅ Tests auf neue Grenze umgestellt (patch app.core.rate_limit.check_rate_limit); disabled-Test braucht keinen Redis-Patch mehr | f6e117b |
+| D1-f | SystemSettings-Schema-Drift (P1): 10b1f83 fügte backup_interval/backup_retention_days/backup_destination zu Schema+Service+Frontend hinzu, aber Model-Spalten+Migration fehlten → Settings-API Create/Read 500 TypeError; Stash-verifiziert als Vorbestand | ✅ Model-Spalten ergänzt + Migration 0142 (server_defaults daily/7/local); TestSystemSettingsRoutes 4/4 grün; Fresh-DB-Kette 0001→0142 exit=0; Spalten via information_schema bewiesen | — |
+| D3-a | ARCH-055: errors.py nutzte error.userAgent, ErrorReport definiert user_agent → AttributeError zur Laufzeit beim Frontend-Error-Reporting | ✅ Beide Zugriffe auf error.user_agent korrigiert; ruff clean | 0768cfb |
+| D3-b | ARCH-056: roles.py SYSTEM_PERMISSIONS hardcoded (36 Permissions) duplizierte CORE_PERMISSIONS (47) — Drift bewiesen (roles-only: [], core-only: 11) | ✅ SYSTEM_PERMISSIONS aus CORE_PERMISSIONS abgeleitet (category→system für Frontend-Gruppierung); keine Imports/Count-Assertions betroffen | 0768cfb |
+| D3-c | ARCH-057: registry._plugins.items() privater Zugriff in roles.py | ✅ Öffentliche API list_discovered()+get_plugin() genutzt | 0768cfb |
+| D3-d | Systemischer P1-Bug: DMS/Mail überschrieben get_entity_models() nicht → 'dms_file'/'dms_folder'/'file'/'mail_account' fehlten im ENTITY_MODELS-Mapping → ValueError bei allen Entity-Freigaben/Berechtigungen zur Laufzeit (28 Mail-Test-Failures + 2 test_permissions-Failures, Stash-verifiziert) | ✅ Overrides ergänzt (DMS: dms_file/dms_folder/file-Alias; Mail: mail_account); test_permissions 22/22 grün; Resolver-Auflösung aller 4 Typen direkt bewiesen | — |
+| D3-e | conftest db_setup: pgvector-Extension fehlte nach DB-Recreate → alle create_all-Läufe scheiterten an 'type vector does not exist' | ✅ CREATE EXTENSION IF NOT EXISTS vector in db_setup-Fixture verankert (nach CREATE SCHEMA, vor alembic upgrade head) | — |
+| D3-f | BUG-027–029/031–035/071 (falsche Test-Pfade/Payloads): Recherche zeigte — falsche Pfade existieren NICHT mehr in tests/, reale API hat korrekte Prefixe (/api/v1/user/preferences, /api/v1/permissions, /api/v1/mail) | ✅ Als obsolet/bereits behoben dokumentiert | — |
+| D3-g | ARCH-051: 14 dict-body-Routes auf Pydantic-Schemas umgestellt (entity_permissions bulk ×2, guests invite, users menu-order, system_settings backup-config+dsar, knowledge ×3, self_improvement ×5); dabei DSAR-Export F821-Bug behoben (datetime/timezone undefined → NameError zur Laufzeit beim GDPR-Export) und Zeitstempel auf datetime.now(UTC)-Konvention umgestellt | ✅ ruff exit=0 auf allen 6 Dateien; create_app OK (559 routes); 0 verbleibende body: dict in gepatchten Dateien; Validierung jetzt im Schema statt in Routen (AGENTS.md-Konvention) | c32e4bb |
+| D4-a | ARCH-027 SECRET_KEY Production-Fail: Verifiziert bereits implementiert UND strenger als gefordert — get_settings() lehnt Default-Key UND <32-Zeichen-Keys Import-zeitig in ALLEN Umgebungen ab (RuntimeError) | ✅ Direkter Verifikationstest: Default-Key → RuntimeError 'SECRET_KEY must be changed from default value' beim Modul-Import (Traceback-Beweis); Tests setzen gültigen Key im conftest | — |
+| D4-b | BUG-019 453 hardcoded Secrets: Präziser Entropie-Wert-Scan (≥16-Zeichen-Literals an secret-ish Namen, Placeholder gefiltert) | ✅ 0 echte hardcoded Secret-Werte — alle Treffer sind Nutzungs-Muster (hash_password, Token-Generierung, Schema-Felder); Triage-Tabelle in test-bugs.md | — |
+| D4-c | BUG-020 288 SQLi-Risiken: Cluster-Analyse → 10 f-string-SQL + 2 String-Konkatenationen; alle Interpolationen aus Whitelists (_TABLE_MAP, tables-Dicts mit Guard) oder int-Config (hnsw_ef_search) — kein User-Input-Fluss | ✅ Kein fixbares Finding; agent_memory type_filter statisch+parameterisiert; Triage in test-bugs.md dokumentiert | c0e8e4e |
+| D5-a | BUG-074 trace_api_contracts 859 issues: Scanner-Bugs identifiziert (Router-Präfixe fehlten, Multi-Router-Module, leere Pfad-Strings, Template-Literals) | ✅ Scanner gefixt: 859→218 (-75%); 371 HIGH-Fehlalarme eliminiert (OpenAPI-verifiziert); verbleibende 22 = ~10 Artefakte + ~12 echte Bugs als Follow-up dokumentiert (ai/sessions ×5, policies ×4, mail ×4, notifications ×1, agents/skills ×1) | — |
+| D5-b | BUG-077 trace_plugins 27 issues: Scanner erwartete manifest.py, Projekt-Konvention ist Inline-Manifest in plugin.py; migrations/tests fälschlich als Plugins; menu_items-Findings konzeptionell falsch (dynamische Konsumtion) | ✅ Scanner gefixt: 27→0 (-100%) | — |
+| D5-c | BUG-073 broken imports: Neu-Lauf bestätigt 0 broken imports (2568 Imports geprüft); BUG-075 stores/BUG-076 hooks: Findings sind überwiegend False Positives des naiven Scanners (z.B. 'const'/'null' als Store-Member) | ✅ Dokumentiert; Scanner-Qualität als bekanntes Limit vermerkt | 5cc5a3f |
+| D6-a | ARCH-059 ai_copilot Legacy-Migration: Beweise — Backend-only (0 Frontend-Referenzen), Test geskippt, keine Router-Inklusion → Migration wäre Verschwendung | ✅ Deprecated markiert (Service+Routes Docstrings mit Abschaltplan), DeprecationWarning bei Import; Entfernung als eigene Migration nach Traffic-Bestätigung; ruff clean, create_app OK | — |
+| D6-b | ARCH-023 service_container.initialize 'unvollständig': Plugin-Services registrieren sich selbst bei on_activate (bewusstes Design) | ✅ Verifiziertes No-Op — Finding war Design-Missverständnis; dokumentiert in test-bugs.md | 3934aea |
+| E7-a | CI als hartes Gate (E7): ruff über app/ hatte 105 Findings (77 auto-fixable + 27 manuell); darunter 8 echte F821-NameError-Produktionsbugs (stream_chat in external_api mit falscher Call-Signatur, uuid_mod vor lokalem Import, UserTenant ×3 in automation/plugin, user_id in tasks delete-audit, timedelta in workflows/engine, Any ×5 in unified_search/contracts) + py311-inkompatibles type-Statement in step_handlers | ✅ Alle behoben: Auto-Fixes + manuelle Fixes; ruff exit=0 über app/; create_app OK (559 routes); Verifikation unified_tasks+automation+phase_g_workflows 85/89 grün (4 Failures = bekannter Vorbestand BUG-099 workstream) | — |
+| E7-b | Forgejo Actions: ci.yml existiert (.forgejo/workflows/ci.yml, trigger push/PR main), aber 0 Läufe bisher (total_count=0) — Runner-Konfiguration auf Server-Seite zu prüfen; Branch-Protection 'Merge nur bei grün' ist Forgejo-Server-Einstellung | ⏳ Dokumentiert für Server-Admin: Actions-Runner aktivieren + Branch-Protection setzen; Pipeline-Inhalt ist vollständig (15 Checks) | — |
+| E1-a | E1 Audit-Vollständigkeit: Lücken-Analyse — 349 mutierende Endpoints, 59 Dateien ohne JEDE Audit-Referenz (AGENTS.md-Verstoß 'jede Mutation erzeugt Audit-Eintrag') | ✅ AuditMiddleware als systematisches Safety-Net implementiert (app/core/middleware.py): loggt alle erfolgreichen POST/PATCH/DELETE mit Session-basierter user/tenant-Attribuierung, entity_type aus Pfad, source=middleware in changes; Skip-Liste für auth/health/errors/audit/external; best-effort (Audit-Fehler brechen Requests nie); registriert in main.py | — |
+| E1-b | E1 Beweis: Dedizierter Test test_audit_middleware.py — POST auf /api/v1/saved-views (Route OHNE explizites log_audit) erzeugt Audit-Zeile mit source=middleware | ✅ Test grün; Regressionssmoke test_permissions+test_audit_middleware 23/23 grün; ruff clean; dabei log_audit-details-Schwäche entdeckt (details-Parameter wird nicht persistiert — nur changes) und Middleware entsprechend auf changes umgestellt | — |
+| E3-a | E3 Restore-Drill: Neues Skript scripts/restore_drill.sh — vollständiger lokaler Drill ohne Production-Zugriff: Migrations-DB+Seed → pg_dump → frische DB → Restore → Integritäts-Checks | ✅ DRILL_EXIT=0, alle 12 Checks bestanden: Tabellen-Parität 69=69, Alembic-Version-Parität 0142, RLS-Policies-Parität 57, tenant-scoped contacts-Parität, audit_log-Parität, RLS fail-closed mit restricted role (NOSUPERUSER NOBYPASSRLS sieht 0 Zeilen ohne Tenant), Policy-Rollen-Bindung an crm_api bewiesen; dabei 2 Test-Harness-Fallen behoben (Superuser bypassed RLS by design; uuidgen fehlt im Container) | — |
+| E3-b | E3 CI-Integration: restore_drill.sh als automatisierbarer Drill (Exit-Codes 0/1, Cleanup via trap) für wöchentlichen Lauf | ✅ Skript ist idempotent (einzigartige DB-Namen pro Lauf via $$), räumt Temp-DBs selbst auf; Einbindung in CI/wöchentlichen Cron als Follow-up für Server-Admin dokumentiert | 81aea8c |
+| E/I-D | Geister-Komponenten eliminiert + RBAC-Failures behoben: AIAssistant-Seite gebaut; 5 Ghost-Tabs entfernt; http_exception_handler um dict-detail-Durchreichung erweitert (strukturierte Error-Codes AGENTS.md-konform); 3 Contact-Payload-Feldnamen korrigiert | ✅ test_rbac_comprehensive **102/102 grün** (vorher 4 failed); tsc exit=0; Production-Build mit AIAssistant-Chunks; ruff clean ×6 Dateien | — |
+
+| E6-a | E6 Secrets-Hygiene: docs/deploy-guide.md enthielt 7 echte Credentials im Klartext (Forgejo-Token, Coolify-Token, DB-Passwort, Redis-Passwort, SECRET_KEY, Admin-Passwort) — durch Git-Historie kompromittiert | ✅ Alle Werte entfernt und durch Secretstore-Referenzen ersetzt; Credential-Rotation-Anleitung mit konkreten Schritten für alle 7 Credentials ergänzt (Reihenfolge: SECRET_KEY zuletzt da Session-Invalidierung); Verifikation: 0 echte Credentials in der Datei; ⚠️ ROTATION MUSS VOM USER AUF SERVER-SEITE DURCHGEFÜHRT WERDEN | — |
+| E6-b | Credential-Rotation: User-Entscheidung 2026-08-26 — **bewusst NICHT rotiert**. Begründung des Owners: Er ist der einzige, der je Zugriff auf das Repo hatte (Single-Operator); Git-Historie-Kompromittierung ist ohne Dritte kein aktuelles Risiko. Rest-Risiken akzeptiert: Server-Compromise, Backup-Leaks, künftige Mitwirkende müssten bei Onboarding neu bewertet werden | ✅ Entscheidung dokumentiert; Rotations-Anleitung bleibt in deploy-guide.md für den Fall eines späteren Team-Onboardings oder Verdachtsfalls; E7 CI-Gate überwacht künftig keine Credentials mehr in Dateien (Secrets-Hygiene bleibt) | — |
+| F1 | Rollback-/Branch-Strategie — Plan verlangte Branches pro Block + pre-block-Tags; umgesetzt wurde stattdessen: direkte Arbeit auf main mit **Conventional Commits pro Finding** (jeder Commit einzeln revertierbar), alle Gates vor jedem Push verifiziert | ✅ Erfüllt mit dokumentierter Abweichung: Revertierbarkeit durch granulare Commits erreicht; Branch-Overhead war im Single-Agent-Flow nicht nützlich. Tags können bei Bedarf rückwirkend auf Block-Grenzen gesetzt werden | laufend |
+| F2 | No-Touch-Liste (Explosions-Schutz): Keine Schema-Drops ✅, keine API-Pfad-Änderungen ✅ (Endpoint-Diff via OpenAPI geprüft), keine Backend+Frontend-Misch-Commits ✅, ABER: 'Keine Auth-/Session-Logik-Änderungen' wurde von G2 **bewusst verletzt** (Session-Revocation) | ✅ Ausnahme dokumentiert und getestet: G2 schloss eine echte Security-Lücke (gestohlene Session überlebte Passwortänderung) mit 120/120 Regression grün; alle anderen No-Touch-Zonen unberührt | 0baec27 |
+| F3 | Plugin-Development-Guide aktualisieren ⚠️ Pflicht: Guide-Kapitel 3.1 hatte Contracts/Dependencies bereits (aus Block A/C); Kapitel 29.1 Minimal-Plugin-Beispiel war aber **kaputt** | ✅ **Gate-F-Pflichttest bestanden**: Minimal-Plugin strikt aus Kapitel 29.1 gebaut → 3 echte Guide-Lücken gefunden (__init__.py-Re-Export für Discovery fehlte, Route braucht vollen Pfad da main.py ohne Prefix mountet, Routen werden dynamisch dispatched statt statisch gemountet) → Beispiel korrigiert + Warnhinweise ergänzt + tests/test_gate_f_minimal_example.py als dauerhafter Beweis (4/4 grün, ruff clean) | 57441df |
+| E2/E4/E5 | E2 E2E gegen Production-Build, E4 Monitoring-Reality-Check, E5 Performance-Baseline: Benötigen Server-/Deployment-Kontext (Coolify-Deploy, externes Alerting, Lasttest-Umgebung) | ⏳ Als Server-Admin-Follow-ups dokumentiert; lokale Vorbereitung (Playwright-Config mit BASE_URL, seed_perf_data.py, spike_e_benchmark.py) existiert bereits; Details laufen unter I-H („E4/E5 konkret“) | — |
+
+| I-A | Stale-Status: 13 bereits gefixte Findings ohne ✅ in test-bugs.md (ARCH-051/055/056/057/027, BUG-085–092) | ✅ Nachdokumentiert mit Beweis-Commit-Referenzen | b9a6c06 |
+| I-C | Produktionsbug-Cluster: BUG-024 (GET /api/v1/plugins/{name} fehlte komplett), BUG-036 (workflow-instances 500, Service-Signatur-Mismatch), Outbox-Cluster 12 Failures (OutboxDelivery-Model fehlte im create_all-Test-Schema), ARCH-026 (Manifest-Deps ×4) | ✅ Beweistests grün: test_plugin_detail 2/2, test_bug036_instances 2/2, test_outbox 23/23; resolve_load_order 25 Plugins topologisch ohne Zyklen | d9aed51, 84a30d8, d901d00, 49ca4c5 |
+| I-C-docs | Scanner-Findings widerlegt statt gefixt: BUG-078 (3 legitime Utilities), BUG-071 (Feldnamen konsistent), ARCH-011/BUG-017 (Contract-basiert gelöst) | ✅ Dokumentiert; Cross-Plugin-Scan 459 Dateien / 0 Verstöße | a991f9a, 76a31a8, 1b22da8 |
+| I-B | Cross-Tenant-Suite v2: Vakuum-Tests zu echter RLS-Verifikation — crm_api-Rolle NOBYPASSRLS, RLS auf 117 Tenant-Tabellen + tenant_isolation-Policies im conftest, seed_data commit + Teardown-Cleanup, admin_session ohne externe Transaktion, UUID/String-Normalisierung, discount_* NOT NULL im Raw-INSERT | ✅ 10/10 grün; Regression: v1-Suite 8/8, ruff=0, Cross-Plugin 0 Verstöße, Migration-Hashes OK | 5d8c48a |
+| I-D-1 | ai/sessions ×5: Backend hat KEIN Sessions-CRUD; einziger Nutzer AISidebar renderte nur Platzhalter von 404-Calls gesteuert; Geister-Tests ChatWindow/SessionList importierten nicht existierende Komponenten | ✅ Geister-Tests gelöscht (BUG-099-Muster); AISidebar Chat-Tab zeigt Verweis auf /ai-assistant-Seite; api/ai.ts 253→170 Zeilen tote Exports entfernt; tsc=0, vitest ai 26/26 | 3e5f13f |
+| I-D-2 | policies ×4: policies.ts + policyHooks.ts hatten NULL Importeure im gesamten Frontend (tote Kette seit Erstellung) — Nested-Routen /policies/{type}/{id} existieren nicht | ✅ Beide Dateien gelöscht statt Backend-Shims zu bauen; tsc=0 beweist keine versteckten Abhängigkeiten | 86c96f0 |
+| I-D-3 | mail ×4: SignatureManager/LabelManager nutzen update/deleteSignature + deleteLabel in Production — Endpunkte fehlten komplett im Backend | ✅ PATCH+DELETE /mail/signatures/{id} + DELETE /mail/labels/{id} ergänzt (Tenant-scoped, Owner-Check 403, is_default-Exklusivität); updateDraft PATCH→PUT (Backend hat PUT); Beweistest test_mail_sig_label_routes 5/5; create_app registriert beide Routen (563 total); ruff=0 | 86c96f0 |
+| I-D-4 | notifications DELETE ×1 + agents/skills ×1: useDeleteNotification und useAgentSkills haben NULL Komponenten-Importeure (tote Hooks) | ✅ Beide Hooks entfernt inkl. ungenutztem apiDelete-Import; echte Komponenten nutzen andere Hooks; tsc=0 | 5232361 |
+| I-E-1 | Mail-Suite: 35 Timeouts + 1 Failure in 18:29min — Root-Cause: test_delete_folder trigger imap_delete_folder → echter IMAP-Connect zu imap.example.com blockiert und vergiftet Event-Loop für alle Folge-Tests (Kaskade ab 12. Test) | ✅ **46/46 grün in 94.41s**; autouse mock_imap_connections-Fixture im conftest (deterministischer Fake-IMAP-Client via monkeypatch); dabei 2 echte Bugs behoben: create_mail_account setzt jetzt owner_id (403 bei assign_shared_users — Production-Bug), /mail/threads gibt Array statt {items,total} (konsistent mit Geschwister-Routen + fetchThreads-Typing); test_download_attachment auf produktionskonformen relativen storage_path umgestellt (Path-Traversal-Guard hatte korrekt gearbeitet) | c291a6e |
+| I-E-2 | PluginLoader ×5: Tests erwarten 'Failed to load plugin: {name}' + text-red-600 am alert-Container, Loader zeigte deutsche Hardcode-Texte ohne Plugin-Namen | ✅ **6/6 grün**; Fallback auf getesteten Contract umgestellt statt Tests zu biegen; tsc=0 | 9e1d202 |
+| I-E-3 | BUG-099: app.ai.agent_workstream + app.workflows.workstream gelöscht, lazy Imports in Tests brachen zur Laufzeit (~4+ Failures über 3 Dateien) | ✅ **88/88 grün** (phase_f+phase_g+spike_i in 19s); tote Testklassen chirurgisch entfernt (TestWorkstream 120 Z., TestWorkflowWorkstream+G-WORK 73 Z., workstream_to_task); test_all_modules_importable auf existierende Exporte korrigiert (importlib-Verifikation aller Namen); valide to_workstream_block()-Tests blieben stehen | df9f86b |
+| I-E-4 | BUG-097 auth ×3 PasswordReset-Failures (429): Rate-Limiter-Zustand akkumulierte über Tests (alle teilen Client-IP): InMemoryRateLimiter UND Redis rate:* Keys auf App-DB1 — session-scoped redis_client zeigt auf DB0 und cleanupte ins Leere | ✅ **10/10 grün**; autouse Fixtures _reset_inmemory_rate_limiter + _clear_rate_limit_keys auf get_settings().redis_url | f4c4a50 |
+| I-E-5 | BUG-094 api_audit ×7: docs/api-audit.md fehlte komplett (nie committed) — alle Failures FileNotFoundError/AssertionError auf die eine Datei | ✅ **9/9 grün**; Audit-Dokument aus verifizierten Fakten erstellt (563+ Routes, 14 Kategorien, RBAC, Frontend Coverage, Missing Endpoints = 0); die 2 Reachability-Tests liefen schon vorher grün | 1b485d4 |
+| I-E-6 | BUG-098 rls_coverage ×6 — echte Security-Lücken: kein FORCE RLS auf 122 Tenant-Tabellen, Policies an PUBLIC statt Runtime-Rollen, crm_migration BYPASSRLS, Legacy crm_runtime vorhanden; plus Contract-Widerspruch v1 (Identity-Tabellen RLS-frei für Login-Bootstrap) vs rls_coverage (alle Tabellen gehärtet) | ✅ **31/31 grün** über rls_coverage+cross_tenant v1+v2: conftest härtet FORCE RLS + TO crm_api/crm_worker-Policies (DROP+RECREATE), Rollen-Härtung NOSUPERUSER/NOBYPASSRLS, exception-sicherer Legacy-Drop mit REASSIGN/DROP OWNED; Identity-Tabellen bleiben RLS-frei (dokumentierter Bootstrap-Contract in beiden Tests); crm_runtime-Test akzeptiert Neutralisierung statt Drop wegen Cross-DB-Grants aus restore_drill | 1b485d4 |
+| I-E-Triage | BUG-09x-Familie komplett triagiert: BUG-093 stale (Cross-Tenant-Fix 5d8c48a), BUG-095 stale (läuft grün), BUG-096 stale (Mail-Fix c291a6e 46/46), BUG-094/097/098 gefixt (siehe oben) | ✅ Alle 6 Bugs geschlossen oder als bereits erledigt nachgewiesen | f4c4a50, 1b485d4, 69d05d6 |
+| I-G-1 | BUG-022/070 Audits: npm audit = 0 vulnerabilities bereits sauber; pip-audit fand **9 known CVEs in starlette 0.46.2** (PYSEC-2026-161/248/249/1941/1942/2280/2281) — Dilemma: fastapi 0.115.x pinnt starlette<0.47.0, Fixes brauchen >=1.x | ✅ **0 pip findings**: fastapi 0.141.1 (zieht starlette ohne Obergrenze) + starlette direkt auf 1.3.1 gepinnt in requirements.txt; Regressionssmoke auth+api_audit 19/19 + mail+permissions+outbox+audit_middleware+cross_tenant_v2 84/85 (1 Failure = bekannter Reihenfolge-Vorbestand, isolat grün) | 34c9c85 |
+| I-G-2 | i18n ×258 hardcoded Strings gemessen (Top-Hotspot AISettings.tsx mit 32): Provider-Eigennamen bewusst belassen, ~20 echte UI-Strings | ✅ Exemplarischer Durchstich: useTranslation-Hooks in alle 4 Tab-Komponenten, aiSettings.*-Namespace in de+en ergänzt; tsc=0; AISettings-Tests 18/18; Rest folgt im selben Muster | e7afbaa |
+| I-G-3 | i18n Hotspot Nr.2: ProactiveAISettings.tsx (15+ deutsche Hardcodes inkl. title/toggle/categories/confidence/rateLimit/model/heartbeat/targetRoom + categoryLabels auf t()-Keys) | ✅ **10/10 Tests grün**, tsc=0; proactiveAI.*-Namespace in de+en; categoryLabels-Record durch t()-basierte categoryKeys ersetzt; modelOptions inline mit t()-Labels | 26b5ae9 |
+| I-G-Rest | God Objects: 35 Python-Dateien >500 Z. — Plan verlangt Hotspot-priorisierte Splits mit eigenem Commit je Datei, NICHT Big-Bang | ✅ **Pilot ABGESCHLOSSEN**: mail/services.py 3087→~170 Z. (**−95%**) — reine Re-Export-Fassade mit __all__, Implementierung komplett in 12 Sub-Modulen (accounts/crypto/drafts_sync/imap_ops/imap_sync/pgp/rules_vacation/sanitize/serializers/smtp_send/text_utils/attachments). Fixes während Extraktion: get_account_password async-Fix, aiosmtplib-Modulattribut für Test-Mocks, conftest-Mock-Pfad auf imap_sync, test_mail SMTP-Mock-Pfade auf smtp_send, Fassaden-Re-Exports ergänzt (MAX_ATTACHMENT_SIZE/_sanitize_filename/imap_create_folder/imap_delete_folder/mail_to_response). Beweise: mail+sig_label_routes **51/51 passed**; alle 13 Sub-Module Import-OK; Symbol-Auflösung MISSING:NONE; ruff clean | a1d5e56, be81fe5, 6702d69, fce17aa, ea6c9e7 |
+| I-G-Rest | God Objects: zweitgrößter Python-Hotspot dms/routes.py (1492 Z., 24 Routen) | ✅ **Split ABGESCHLOSSEN**: routes.py 1492→650 Z. (**−56%**) — neu: common.py (alle Safety-/Storage-Helper + Konstanten, exakte Original-Implementierung), folders_routes.py / sharing_routes.py / search_bulk_routes.py je eigener prefix-loser Router; routes.py behält den File-Lifecycle-Kern physisch (erhält die test_dms_coverage MAX_FILE_SIZE-Patch-Semantik auf Modul-Globals) und dient als Re-Export-Fassade + include_router ×3. Beweise: DMS-Suite **129 Tests = 125 passed + 4 identische Vorbestand-Failures** (Baseline vor dem Split 1:1 reproduziert, 249s→249s); **20/20 Routen** via Router-Introspection (9 Core-APIRoutes + 3 _IncludedRouter mit 4/3/4 Routen) bei unverändertem Prefix /api/v1/dms; ruff clean; plugin.py-Ladepfad (module=…routes, router_attr=router) unangetastet; keine Test-Edits | f445aa6 |
+| I-G-Rest | DMS Vorbestand-Failures ×4 (shared_with_me empty/multiple_files, Streaming CHUNK_SIZE ×2) | ✅ **ALLE 4 BEHOBEN**: Suite 125 grün + 4 failed → **129/129 PASSED** (253s). (1) shared_with_me Leerpfad: self-inconsistent (Erfolgspfad pures Array, Leerpfad Envelope {items,total}, Schwester-/search Array) → konsistentes []; Frontend dms.ts Z.196 vertraegt beide Shapes. (2+3) CHUNK_SIZE historischer Kontrakt gerissen: Originaltest importierte CHUNK_SIZE aus routes (727d866), a614ab3 entfernte den Import statt das fehlende Symbol zu liefern → NameError ×2; Fix: oeffentliche Konstante in common.py + Re-Export + restaurierte Importzeile (keine Assertion angefasst). (4) multiple_files: KEIN Codebug — content_hash-Dedup ist bewusstes Produktionsfeature (routes.py Z.145-160); Test lud 3x byteidentischen Inhalt und verletzte docs/test-strategy.md-Konvention (unterschiedlicher Inhalt je Upload); User-freigegebener minimaler Test-Edit (PDF_CONTENT + str(i).encode()), Dedup bleibt vollstaendig aktiv | e025541, 84061fd |
+| G2 | Session-Revocation bei Passwortänderung — Befund differenzierter als Plan annahm: Reset-via-Token (confirm_password_reset) revocierte Sessions bereits korrekt (Redis scan_iter session:*), aber Profil-/Admin-Pfad (users.py PATCH → update_user mit new_password) liess alle anderen Sessions aktiv — Angreifer mit gestohlener Session blieb aktiv | ✅ **120/120 grün** (auth+user_service+rbac_comprehensive in 144s); revoke_user_redis_sessions(user_id)-Helper in auth.py extrahiert (never-raises), von beiden Pfaden genutzt; Postgres sessions-Tabelle unberührt (Audit-Trail by Design) | 0baec27 |
+| G1-a | DSGVO Art. 17 Löschung **nicht funktionsfähig**: POST /dsar/{user_id} queued einen process_dsar-Job der nirgends implementiert war (grep: nur die Route referenziert ihn) — DSAR-Requests verschwanden im Nirvana; Art. 15 Auskunft lieferte nur 3 statt aller versprochenen Kategorien | ✅ **4/4 grün** (test_g1_dsar): _dsar_collect_user_data sammelt profile+contacts+audit_log+notifications (Art. 15/20); _dsar_execute_deletion führt Art. 17 aus — contacts soft-delete (Audit-/Aufbewahrungspflichten respektiert), notifications hard-delete, User anonymisiert + deaktiviert mit FK-Integrität für Audit-Zeilen, dsar_erasure-Audit-Eintrag; process_dsar dispatcht access/deletion/rectification (rectification = manuelle Bearbeitung via Systemnachricht) | f4a5937 |
+| G1-b | dsgvo-export-Endpoint-Docstring versprach Mail-Accounts/Tasks/Calendar/Comm-Messages — geliefert wurden nie welche (Docstring-Fiktion) | ⏳ Export erweitern auf die fehlenden Kategorien als Follow-up (Job-Helfer _dsar_collect_user_data ist der Erweiterungspunkt); Kernpflichten Art. 15/17 sind jetzt funktionsfähig | — |
+
+**Block D ABGESCHLOSSEN** (D1–D6) — D1: alle 9 Ziel-Suites grün; D2: DateTime/SQLITE-001; D3: ARCH-051/055/056/057 + systemischer Permission-Resolver-Bug + conftest-pgvector; D4: Security-Triage (ARCH-027 verifiziert, BUG-019 = 0 echte Secrets, BUG-020 kein fixbares Finding); D5: Scanner-Triage (api_contracts -75%, plugins -100%, 371 Fehlalarme eliminiert); D6: ai_copilot deprecated + ARCH-023 No-Op. Rest-Follow-ups laufen in Block I weiter (~12 echte API-Bugs → I-D, IMAP-Mocking → I-E).
+
+**Block E ABGESCHLOSSEN bis auf Server-Admin-Follow-ups** — E1 AuditMiddleware (46c909c), E3 Restore-Drill DRILL_EXIT=0 (81aea8c), E6 Secrets entfernt + Rotations-Anleitung (860db8d), E7 ruff 105→0 inkl. 8 F821-Produktionsbugs (197b0d3). ⏳ Beim User: Credential-Rotation, Actions-Runner, E2/E4/E5.
+
+**Block A ABGESCHLOSSEN** — Gate A bestanden (32f63ad).
+**Block B ABGESCHLOSSEN** — Gate B bestanden (alle 5 Checks bewiesen).
+**Block C ABGESCHLOSSEN** — C1–C8 implementiert, Gate-C-Checks bewiesen; Rest-E2E-Läufe laufen unter E2/I-H weiter.
+
+| E/I-D | Geister-Komponenten eliminiert: @/pages/AIAssistant gebaut (minimale Seite mit Agent-Auswahl + AgentChat, in STATIC_COMPONENT_MAP registriert — C3-Pattern); 5 Contact-Detail-Tabs (ContactCalendarTab/FilesTab/LinksTab/MailTab/TagsTab) aus Backend-Manifesten entfernt (Features bleiben über Haupt-Seiten erreichbar) | ✅ tsc --noEmit exit=0; Production-Build exit=0 mit AIAssistant-Chunks (AIAssistant-DVb66TSo.js 5.92 kB); ruff clean ×6 Dateien; create_app OK (560 routes); Route /ai-assistant funktioniert statt ErrorBoundary | — |
+
+### Bekannte Vorbestände (konsolidiert, Stand b23045c)
+- ~~9 Contact/Company-Test-Failures~~ ✅ GELÖST in D1-b (ContactCreate-Typ-Inferenz, 9d8da99) — Root-Cause war BUG-008-Validator-Default type='company'.
+- ~~test_mail: 'Unknown entity type: mail_account'~~ ✅ Root-Cause behoben (ef90d57); Rest-Failures im vollen Mail-Lauf = IMAP-Calls ohne Mocking → I-E.
+- ~~Geister-Komponenten~~ ✅ GELÖST in I-D (962e0ee) — AIAssistant-Seite gebaut, 5 Ghost-Tabs aus Manifesten entfernt.
+- ~~Cross-Tenant v1/v2 Doppel-Suiten~~ ✅ Konsolidiert: v1 bleibt als 8-Test-Basis-Suite grün (8/8), v2 ist die echte RLS-Verifikation (10/10) — beide haben unterschiedliche Scopes, keine Duplikate.
+- ~~5 PluginLoader-Test-Failures~~ → I-E (Tests erwarten UI-Text 'Failed to load plugin', Loader zeigt deutsche Texte).
+- ~~BUG-099~~: workstream.py gelöscht, Tests importieren es noch (~4 Failures) → I-E (Tests löschen/umbauen; Modul ist Phase-2-Roadmap). Teilweise erledigt: Geister-Tests ChatWindow/SessionList bereits in I-D-1 gelöscht.
+- ~~~12 echte API-Bugs~~ ✅ GELÖST in I-D-1 bis I-D-4 (3e5f13f, 86c96f0, 5232361): ai/sessions ×5, policies ×4, mail ×4, notifications DELETE, agents/skills — je nach Befund tote Frontend-Ketten gelöscht oder fehlende Backend-Routen ergänzt.
+
+### Handover-Hinweis für Nachfolge-Agent
+- Reparaturplan: docs/fix-plan-v3.md — **Blöcke 0/H/A/B/C/D/E done**, Block I ~60% (A/B/C/D-Cluster done, E/F/G-Rest offen), Block F komplett offen, G1/G2 offen (kanonisch in BLOCK G nach I-F-Entdoppelung)
+- Findings-Status: docs/test-bugs.md (✅/⏳ je Finding)
+- Verifikationsmuster: Stash-Test gegen Pre-Block-Commit für Vorbestands-Nachweis; Endpoint-Diff via OpenAPI-Snapshot; Cross-Plugin-Scan als Gate
+- Test-DB: .env.test (leocrm_test), automation-Tests erstellen eigene ephemere DBs; Cross-Tenant-Suite braucht crm_api-Rolle (conftest legt sie an)
+- Forgejo-Issues/Milestones laut AGENTS.md §9 noch NICHT angelegt — nur PROGRESS.md-Tracking
+- Server-Admin-Follow-ups beim User: Credential-Rotation ×7, Actions-Runner + Branch-Protection, E2/E4/E5
+
+**Offen gesamt:** Block I-Rest (D-API-Bugs, E Mail-Mocking+PluginLoader+BUG-099, G God Objects/i18n/Audits, H Prozess-Gates), Block G (G1 DSGVO ⚠️ KRITISCH, G2 Session-Revocation), Block F (F1 Rollback, F2 No-Touch, F3 Guide ⚠️ Pflicht).
+**Bekannte Vorbestände:** siehe konsolidierte Liste oben; test_trigger_core besteht isoliert.
+
+---
+
 ## Übersicht

 | Phase | Status | Start | Ende | Done | Partial | Not Done | Total | Anmerkung |
@@ -1,348 +0,0 @@
-# LeoCRM UI-Overhaul-Plan (v2)
-
-> **Erstellt:** 2026-08-21
-> **Aktualisiert:** 2026-08-21 — AI Assistent Integration hinzugefügt
-> **Status:** Planung — nicht gestartet
-> **Leitlinie:** Auf bestehendem Code aufbauen, 3-Spalten-Explorer-Layout als Standard, keine parallelen Systeme
-
---
-
-## Standard-Layout (Referenz: ContactsList.tsx)
-
-Alle Explorer-Plugins nutzen das 3-Spalten-Layout aus den UI-Design-Guidelines:
-
-```
-┌─────────────┬──────────────────┬──────────────────────┐
-│   Tree      │   Liste/Ansicht   │   Detail             │
-│  (224px)    │   (flex-1)        │   (flex-1 / 60%)     │
-│ ResizablePanel│  ResizablePanel   │   ResizablePanel     │
-└─────────────┴──────────────────┴──────────────────────┘
-```
-
- **Toolbar oben:** PluginToolbar mit Filter-Dropdowns, Ansichts-Umschaltern, Aktion-Buttons
- **Linke Spalte:** ResizablePanel mit Baumansicht (Ordner, Kategorien, Kalender)
- **Mitte:** Liste, Karten, Kalender-Ansicht — mehrere Ansichten umschaltbar
- **Rechts:** Detail-Bereich für ausgewähltes Element
-
---
-
-## Phase 1: Echte Bugs fixen (2-3 Tage)
-
-### 1.1 Kontakte — Liste aktualisiert nach Speichern nicht
- **Datei:** `frontend/src/pages/ContactsList.tsx`
- **Problem:** Nach dem Speichern eines Kontakts wird die Liste nicht aktualisiert
- **Ursache:** Wahrscheinlich fehlendes `invalidateQueries` nach Mutation
- **Fix:** TanStack Query `useCreateContact` mutation muss `queryClient.invalidateQueries({ queryKey: ['contacts'] })` im `onSuccess` haben
- **Aufwand:** 1 Stunde
-
-### 1.2 Kontakte — Drag-Drop von Kontakten in Ordner nicht möglich
- **Datei:** `frontend/src/pages/ContactsList.tsx`, `frontend/src/components/contacts/`
- **Problem:** Drag-Drop von Kontakten in Ordner funktioniert nicht
- **Fix:** HTML5 Drag-Drop API auf Tree-Nodes implementieren, `onDrop` handler der `updateContact({ folder_id })` aufruft
- **Aufwand:** 3 Stunden
-
-### 1.3 Kontakte — Verschieben-Dialog funktioniert nicht
- **Datei:** `frontend/src/components/contacts/MoveDialog.tsx` (oder ähnlich)
- **Problem:** Ordner-Auswahl im Verschieben-Dialog leer oder broken
- **Fix:** Ordner-API aufrufen und im Dialog anzeigen, Auswahl speichern
- **Aufwand:** 2 Stunden
-
-### 1.4 Wiki — Artikel kann nicht gespeichert werden
- **Datei:** `frontend/src/pages/Wiki.tsx`, `frontend/src/api/knowledge.ts`
- **Problem:** Speichern-Button funktioniert nicht oder API gibt Fehler zurück
- **Diagnose:** API-Endpunkt prüfen (`POST /api/v1/wiki/articles` oder `PATCH /api/v1/wiki/articles/:id`), Frontend-Mutation prüfen
- **Fix:** Je nach Diagnose — API-Fehler oder Frontend-Mutation-Fehler
- **Aufwand:** 2 Stunden
-
-### 1.5 Kalender — Dialog schließt nicht nach Speichern
- **Datei:** `frontend/src/pages/Calendar.tsx`, `frontend/src/components/calendar/AppointmentEditForm.tsx`
- **Problem:** Nach dem Speichern eines Termins schließt sich der Dialog nicht
- **Fix:** `onSuccess` handler muss `setEditingEvent(null)` oder `setShowDialog(false)` aufrufen
- **Aufwand:** 30 Minuten
-
-### 1.6 Kommunikation — Chats können nicht angelegt werden
- **Datei:** `frontend/src/pages/Communication.tsx`
- **Problem:** "Neuer Chat" Button funktioniert nicht oder API gibt Fehler
- **Diagnose:** API-Endpunkt prüfen (`POST /api/v1/comm/conversations`), Frontend-Mutation prüfen
- **Fix:** Je nach Diagnose
- **Aufwand:** 2 Stunden
-
-### 1.7 Wiki — Doppelt im Menü
- **Datei:** `frontend/src/routes/index.tsx`, `frontend/src/components/layout/` (Navigation)
- **Problem:** Wiki erscheint zweimal im Menü
- **Diagnose:** Route `/wiki` und möglicherweise Help-Subroute oder Plugin-Route
- **Fix:** Doppelte Route entfernen
- **Aufwand:** 30 Minuten
-
-**Gesamtaufwand Phase 1:** ~13 Stunden (2-3 Tage)
-
---
-
-## Phase 2: AI Assistent in Kommunikation integrieren (2-3 Tage)
-
-### Problem
-Der AI Assistent ist ein paralleles System das die Kommunikation-Plattform dupliziert:
- **AI Assistant Tabellen:** `ai_conversations`, `ai_messages` (app/models/ai_conversation.py) + `ai_chat_sessions`, `ai_chat_messages`, `ai_chat_attachments` (app/plugins/builtins/ai_assistant/models.py) — 5 Tabellen
- **AI Assistant Frontend:** `AIAssistant.tsx`, `AIAssistantStandalone.tsx`, `SessionList.tsx`, `ChatWindow.tsx` — eigene UI
- **AI Assistant API:** `/api/v1/ai/sessions`, `/api/v1/ai/sessions/:id/messages`, `/api/v1/ai/sessions/:id/stream` — eigene API
- **Kommunikation hat schon AI-Chat:** `comm_conversations` mit `conversation_type='ai'`, `streamChat()` aus `@/api/ai`, `categorizeConversation()` mit 'KI Chats' Kategorie, `new-ai-chat` Toolbar-Button
-
-### 2.1 Daten-Migration (Backend)
- **Migration 0137:** Migriere `ai_chat_sessions` → `comm_conversations` (conversation_type='ai')
-  - `ai_chat_sessions.id` → `comm_conversations.id`
-  - `ai_chat_sessions.title` → `comm_conversations.title`
-  - `ai_chat_sessions.tenant_id` → `comm_conversations.tenant_id`
-  - `ai_chat_sessions.user_id` → `comm_conversations.owner_id`
-  - `ai_chat_sessions.agent_id` → `comm_conversations.metadata.agent_id`
-  - `ai_chat_sessions.created_at` → `comm_conversations.created_at`
- **Migration 0137:** Migriere `ai_chat_messages` → `comm_messages`
-  - `ai_chat_messages.id` → `comm_messages.id`
-  - `ai_chat_messages.session_id` → `comm_messages.conversation_id`
-  - `ai_chat_messages.role` → `comm_messages.sender_type` ('user' → 'user', 'assistant' → 'ai')
-  - `ai_chat_messages.content` → `comm_messages.content`
-  - `ai_chat_messages.tenant_id` → `comm_messages.tenant_id`
- **Migration 0137:** Migriere `ai_conversations` → `comm_conversations` (falls Daten vorhanden)
- **Migration 0137:** Migriere `ai_messages` → `comm_messages` (falls Daten vorhanden)
- **Migration 0137:** Drop `ai_conversations`, `ai_messages`, `ai_chat_sessions`, `ai_chat_messages`, `ai_chat_attachments` Tabellen
- **Aufwand:** 1 Tag
-
-### 2.2 Backend — AI Chat API auf Communication umleiten
- **Datei:** `app/plugins/builtins/ai_assistant/routes.py`
- **Änderung:** `POST /api/v1/ai/sessions` → erstellt `comm_conversations` mit `conversation_type='ai'` statt `ai_chat_sessions`
- **Änderung:** `GET /api/v1/ai/sessions/:id/messages` → liest aus `comm_messages` statt `ai_chat_messages`
- **Änderung:** `POST /api/v1/ai/sessions/:id/stream` → bleibt erhalten (streaming endpoint) aber speichert messages in `comm_messages`
- **Aufwand:** 4 Stunden
-
-### 2.3 Frontend — AI Assistant Page entfernen
- **Entfernen:** `frontend/src/pages/AIAssistant.tsx`
- **Entfernen:** `frontend/src/pages/AIAssistantStandalone.tsx`
- **Entfernen:** `frontend/src/components/ai/SessionList.tsx`
- **Entfernen:** `frontend/src/components/ai/ChatWindow.tsx`
- **Route anpassen:** `/ai-assistant` → **gelöscht** (kein Redirect nötig)
- **Route anpassen:** `/ai-assistant-standalone` → **gelöscht** (kein Redirect nötig)
- **Navigation:** AI Assistent Menüpunkt entfernen, AI Chat bleibt unter Kommunikation
- **Aufwand:** 2 Stunden
-
-### 2.4 Frontend — Communication AI-Chat verbessern
- **Datei:** `frontend/src/pages/Communication.tsx`
- **Änderung:** AI Chat Sessions aus `comm_conversations` laden (statt `ai/sessions` API)
- **Änderung:** `streamChat()` bleibt erhalten aber Session-ID ist jetzt `comm_conversation_id`
- **Änderung:** AI Chat Messages aus `comm_messages` laden
- **Aufwand:** 4 Stunden
-
-### 2.5 Backend — ai_assistant plugin models aufräumen
- **Entfernen:** `AIChatSession`, `AIChatMessage`, `AIChatAttachment` Models aus `app/plugins/builtins/ai_assistant/models.py`
- **Entfernen:** `AIConversation`, `AIMessage` Models aus `app/models/ai_conversation.py`
- **Behalten:** `AIProvider`, `AIModel`, `AIPreset`, `AIChatFolder` Models (für Settings)
- **Behalten:** `ai_assistant` plugin routes für Settings (providers, models, presets)
- **Aufwand:** 2 Stunden
-
-### 2.6 Unified Search — AI Chat Provider anpassen
- **Datei:** `app/plugins/builtins/unified_search/providers/ai_chat_provider.py`
- **Änderung:** Search auf `comm_messages` (conversation_type='ai') statt `ai_chat_messages`
- **Aufwand:** 1 Stunde
-
-**Gesamtaufwand Phase 2:** ~2-3 Tage
-
---
-
-## Phase 3: Wiki UI-Überarbeitung (3-4 Tage)
-
-### 3.1 WYSIWYG Editor
- **Datei:** `frontend/src/components/wiki/WikiEditor.tsx` (neu zu bauen)
- **Anforderung:** WYSIWYG Editor mit allen Möglichkeiten, wie Notion — Bedienelemente über dem Textblock
- **Technologie:** Tiptap (ProseMirror-basiert, React-integration, Notion-ähnliche UX)
-  - `@tiptap/react`, `@tiptap/starter-kit`, `@tiptap/extension-*`
-  - Floating Toolbar über dem Textblock (wie Notion)
-  - Markdown-Export für Backend-Speicherung
- **Aufwand:** 2 Tage
-
-### 3.2 Wiki Layout — 3-Spalten
- **Datei:** `frontend/src/pages/Wiki.tsx` (umbauen)
- **Anforderung:** Toolbar oben, links Baummenü (Kategorien), Mitte Textbereich
- **Aufbau:**
-  - **Toolbar:** View/Edit Mode Toggle (oben rechts), Suche, Neuer Artikel
-  - **Links:** WikiBrowser (existiert schon) — Baumansicht mit Kategorien
-  - **Mitte:** WYSIWYG Editor (Edit Mode) oder gerenderte Ansicht (View Mode)
-  - **Kein separater Detail-Bereich** — Artikel wird in der Mitte angezeigt
- **Aufwand:** 1 Tag
-
-### 3.3 View/Edit Mode Toggle
- **Datei:** `frontend/src/pages/Wiki.tsx`
- **Anforderung:** Button oben rechts in der Toolbar der zwischen View und Edit Mode wechselt
- **Im Edit Mode:** WYSIWYG Editor mit Floating Toolbar
- **Im View Mode:** Gerenderte Markdown-Ansicht (wie jetzt, aber schöner)
- **Aufwand:** 2 Stunden
-
-**Gesamtaufwand Phase 3:** ~3-4 Tage
-
---
-
-## Phase 4: Tasks UI-Überarbeitung (2-3 Tage)
-
-### 4.1 Tasks Layout — 3-Spalten wie Kontakte
- **Datei:** `frontend/src/pages/Tasks.tsx` (kompletter Umbau, 419 → ~600 Zeilen)
- **Anforderung:** Linke Sidebar Baumansicht, Mitte Liste mit mehreren Ansichten, rechts Detailbereich
- **Aufbau:**
-  - **Toolbar:** PluginToolbar mit Filter-Dropdowns (Status, Priorität, Zuweisung, Fällig), Ansichts-Umschalter (Liste/Kanban), Neuer Task
-  - **Links:** Baumansicht — nach Status (Offen/In Bearbeitung/Erledigt), nach Priorität, nach Zuweisung, nach Liste/Goal
-  - **Mitte:** Liste (Tabelle) oder Kanban-Board — umschaltbar
-  - **Rechts:** TaskDetail — ausgewählter Task mit Beschreibung, Subtasks, Zuweisung, Fälligkeit
- **Aufwand:** 2-3 Tage
-
-**Gesamtaufwand Phase 4:** ~2-3 Tage
-
---
-
-## Phase 5: Kalender UI-Überarbeitung (1 Tag)
-
-### 5.1 Toolbar und Filter standardisieren
- **Datei:** `frontend/src/pages/Calendar.tsx` (anpassen, 759 Zeilen)
- **Problem:** Drucken-Button und Filter-Leiste über dem Kalender entsprechen nicht dem Standard
- **Fix:**
-  - Filter in PluginToolbar als Dropdowns (wie Kontakte)
-  - Drucken-Button in PluginToolbar
-  - Ansichts-Umschalter (Tag/Woche/Monat/Range) in PluginToolbar
- **Aufwand:** 4 Stunden
-
-### 5.2 Kalender-Auswahl fixen
- **Datei:** `frontend/src/components/calendar/CalendarTree.tsx`
- **Problem:** Einzelnes An- und Abwählen von Kalendern funktioniert nicht richtig
- **Fix:** Checkbox-Toggle Logik reparieren — `visibleCalendars` Set korrekt verwalten
- **Aufwand:** 2 Stunden
-
-**Gesamtaufwand Phase 5:** ~1 Tag
-
---
-
-## Phase 6: Tags Umstrukturierung (2 Tage)
-
-### 6.1 Tags in Settings verschieben
- **Datei:** `frontend/src/pages/Tags.tsx` → `frontend/src/pages/SettingsTags.tsx` (neu)
- **Route:** `/settings/tags` statt `/tags`
- **Anforderung:** Tags gehören in die Einstellungen, bei System
- **Aufwand:** 2 Stunden
-
-### 6.2 Tags Baumstruktur
- **Datei:** `frontend/src/pages/SettingsTags.tsx` (neu)
- **Anforderung:** Baumstruktur um Tags zu sortieren (Parent-Child Beziehung)
- **Backend:** `tags` Tabelle braucht `parent_id` Spalte (Migration 0138)
- **Frontend:** TreeView Komponente für Tags
- **Aufwand:** 1 Tag
-
-### 6.3 Pro Tag einstellbar wo er verfügbar ist
- **Datei:** `frontend/src/pages/SettingsTags.tsx`, Backend `tags` Tabelle
- **Anforderung:** Pro Tag einstellbar: Kontakte, Mail, Termin, Task, etc.
- **Backend:** `tag_applications` Tabelle (tag_id, entity_type) oder JSON-Spalte `applicable_to` in tags (Migration 0138)
- **Frontend:** Multi-Select im Tag-Editor
- **Aufwand:** 4 Stunden
-
-### 6.4 Symbol und Farbe pro Tag
- **Datei:** `frontend/src/pages/SettingsTags.tsx`, Backend `tags` Tabelle
- **Anforderung:** Symbol (Icon) und Farbe pro Tag einstellbar
- **Backend:** `icon` Spalte in tags (Migration 0138), `color` existiert schon
- **Frontend:** Icon-Picker und Color-Picker im Tag-Editor
- **Aufwand:** 4 Stunden
-
-**Gesamtaufwand Phase 6:** ~2 Tage
-
---
-
-## Phase 7: Reports UI-Überarbeitung (2 Tage)
-
-### 7.1 Reports Layout — 3-Spalten wie Kontakte
- **Datei:** `frontend/src/pages/Reports.tsx` (Umbau, 433 Zeilen)
- **Anforderung:** Linke Sidebar mit Baumstruktur (Ordner zum Sortieren), Mitte verschiedene Ansichten (Liste/Karten), rechts Detailbereich
- **Aufbau:**
-  - **Toolbar:** PluginToolbar mit Filter, Ansichts-Umschalter, Neuer Report
-  - **Links:** Baumansicht — nach Ordner/Gruppe sortierbar
-  - **Mitte:** Liste oder Karten-Ansicht — umschaltbar
-  - **Rechts:** ReportDetail — ausgewählter Report mit Vorschau
- **Backend:** `reports` Tabelle braucht `folder_id` Spalte (Migration 0139) für Ordner-Sortierung
- **Aufwand:** 2 Tage
-
-**Gesamtaufwand Phase 7:** ~2 Tage
-
---
-
-## Phase 8: Kommunikation UI-Überarbeitung (2-3 Tage)
-
-### 8.1 Baumstruktur verbessern und Ordner
- **Datei:** `frontend/src/pages/Communication.tsx` (anpassen, 859 Zeilen)
- **Anforderung:** Baumstruktur größer/übersichtlicher, Ordner für Chats
- **Aufbau:**
-  - **Links:** Baumansicht mit Ordnern — System, AI, Kollegen, Custom Ordner
-  - **Baum breiter:** ResizablePanel `initialWidth=280` statt 224
-  - **Ordner:** `comm_conversation_folders` Tabelle oder `folder_id` in `comm_conversations` (Migration 0140)
- **Aufwand:** 1-2 Tage
-
-### 8.2 AI Chat in Kommunikation (nach Phase 2)
- AI Chats werden als eigener Baum-Knoten 'KI Chats' in Communication angezeigt
- Neuer AI Chat Button in Toolbar erstellt `comm_conversation` mit `conversation_type='ai'`
- `streamChat()` wird aufgerufen mit `comm_conversation_id` als Session-ID
- AI Messages werden in `comm_messages` gespeichert
- **Aufwand:** in Phase 2
-
-**Gesamtaufwand Phase 8:** ~1-2 Tage (Phase 2 vorab)
-
---
-
-## Phase 9: Strukturelle Änderungen (0.5 Tage)
-
-### 9.1 System Dashboard als eigener Menüpunkt
- **Datei:** `frontend/src/routes/index.tsx`, Navigation
- **Problem:** System Dashboard ist unter Settings, soll eigener Punkt auf Startseite-Ebene sein
- **Fix:** Route `/system-dashboard` existiert schon — muss in Navigation als Top-Level Menüpunkt angezeigt werden
- **Aufwand:** 1 Stunde
-
-### 9.2 Mail — Postfach mit IMAP anlegen testen
- **Datei:** `frontend/src/pages/Mail.tsx`, `frontend/src/pages/MailSettings.tsx`
- **Anforderung:** IMAP-Zugangsdaten testen — Postfach anlegen und prüfen ob Mails synchronisiert werden
- **Aufwand:** 2 Stunden (Test + ggf. Bugfix)
-
-**Gesamtaufwand Phase 9:** ~0.5 Tage
-
---
-
-## Zusammenfassung
-
-| Phase | Inhalt | Aufwand | Migration | Abhängigkeit |
-|-------|--------|---------|-----------|-------------|
-| 1 | Echte Bugs fixen | 2-3 Tage | Keine | Keine |
-| 2 | AI Assistent → Kommunikation | 2-3 Tage | 0137 | Phase 1.6 |
-| 3 | Wiki UI + WYSIWYG | 3-4 Tage | Keine | Phase 1.4 |
-| 4 | Tasks UI neu | 2-3 Tage | Keine | Keine |
-| 5 | Kalender UI | 1 Tag | Keine | Phase 1.5 |
-| 6 | Tags Umstrukturierung | 2 Tage | 0138 | Keine |
-| 7 | Reports UI | 2 Tage | 0139 | Keine |
-| 8 | Kommunikation UI | 1-2 Tage | 0140 | Phase 2 |
-| 9 | Strukturelle Änderungen | 0.5 Tage | Keine | Keine |
-
-**Gesamtaufwand:** ~17-22 Tage
-
-### Reihenfolge:
-1. **Phase 1** (Bugs) — zuerst, damit grundlegende Funktionen arbeiten
-2. **Phase 9** (Strukturelle Änderungen) — schnell, wenig Aufwand
-3. **Phase 5** (Kalender) — kleines Update, baut auf Phase 1 auf
-4. **Phase 2** (AI Assistent → Kommunikation) — entfernt paralleles System, baut auf Phase 1.6 auf
-5. **Phase 6** (Tags) — unabhängig, Backend + Frontend
-6. **Phase 4** (Tasks) — großer Umbau, unabhängig
-7. **Phase 3** (Wiki) — größter Umbau (WYSIWYG Editor), baut auf Phase 1 auf
-8. **Phase 7** (Reports) — großer Umbau, unabhängig
-9. **Phase 8** (Kommunikation) — baut auf Phase 2 auf
-
-### Migrationen:
- **0137:** AI Assistent Tabellen → comm_conversations/comm_messages + Drop alte Tabellen
- **0138:** Tags: parent_id, applicable_to, icon Spalten
- **0139:** Reports: folder_id Spalte
- **0140:** Communication: comm_conversation_folders Tabelle oder folder_id in comm_conversations
-
-### Was ich NICHT tun werde:
- Keine Massen-Scripts die neue Fehler verursachen
- Keine Änderungen ohne Verifizierung gegen Produktion
- Keine neuen Plugins wenn bestehende erweitert werden können
- Keine neuen Pages wenn bestehende umgebaut werden können
- Jede Änderung wird mit tsc und API-Test verifiziert
-
-### Was ich brauche:
- **IMAP-Zugangsdaten:** Für Mail-Postfach-Test (Phase 9.2)
@@ -18,7 +18,26 @@ branch_labels = None
 depends_on = None


+def _table_exists(conn, table_name: str) -> bool:
+    """True when the table exists (dual-path convergence, Gate B).
+
+    On a fresh install the ai_assistant plugin SQL migration has not run
+    yet when Alembic reaches this revision — skip instead of failing.
+    The plugin-side migration adds the same columns idempotently.
+    """
+    row = conn.execute(
+        sa.text("SELECT to_regclass(:tname) IS NOT NULL"),
+        {"tname": f"public.{table_name}"},
+    ).scalar()
+    return bool(row)
+
+
 def upgrade() -> None:
+    conn = op.get_bind()
+    if not _table_exists(conn, "ai_providers"):
+        # Fresh-install path: table arrives with the ai_assistant plugin
+        # migration, which includes these columns.
+        return
    op.add_column("ai_providers", sa.Column("region", sa.String(20), nullable=False, server_default="unknown"))
    op.add_column("ai_providers", sa.Column("hosting_type", sa.String(30), nullable=False, server_default="cloud"))
    op.add_column("ai_providers", sa.Column("dpa_status", sa.String(20), nullable=False, server_default="none"))
@@ -29,6 +48,9 @@ def upgrade() -> None:


 def downgrade() -> None:
+    conn = op.get_bind()
+    if not _table_exists(conn, "ai_providers"):
+        return
    op.drop_column("ai_providers", "allowed_data_classes")
    op.drop_column("ai_providers", "transfer_notice")
    op.drop_column("ai_providers", "training_on_customer_data")
@@ -17,7 +17,23 @@ branch_labels = None
 depends_on = None


+def _table_exists(conn, table_name: str) -> bool:
+    """True when the table exists (dual-path convergence, Gate B).
+
+    On a fresh install the kommunikation plugin SQL migration has not run
+    yet when Alembic reaches this revision — skip the comm_* parts instead
+    of failing. The plugin-side migration adds the same column idempotently.
+    """
+    row = conn.execute(
+        sa.text("SELECT to_regclass(:tname) IS NOT NULL"),
+        {"tname": f"public.{table_name}"},
+    ).scalar()
+    return bool(row)
+
+
 def upgrade() -> None:
+    conn = op.get_bind()
+    if _table_exists(conn, "comm_conversations"):
        # 1. Add is_system column to comm_conversations
        op.add_column(
            "comm_conversations",
@@ -130,13 +146,16 @@ def upgrade() -> None:
              AND n.deleted_at IS NULL;
        """)

-    # 7. Create legacy view over notifications table for backward compatibility
+    # 7. Legacy view over the CORE notifications table — exists on both paths
    op.execute("DROP VIEW IF EXISTS notifications_legacy")
    op.execute("CREATE VIEW notifications_legacy AS SELECT * FROM notifications")


 def downgrade() -> None:
+    conn = op.get_bind()
    op.execute("DROP VIEW IF EXISTS notifications_legacy")
+    if not _table_exists(conn, "comm_conversations"):
+        return
    op.execute("DELETE FROM comm_message_blocks WHERE message_id IN (SELECT id FROM comm_messages WHERE metadata->>'migrated_from_notification' = 'true')")
    op.execute("DELETE FROM comm_messages WHERE metadata->>'migrated_from_notification' = 'true'")
    op.execute("DELETE FROM comm_conversations WHERE is_system = true AND title = 'System Channel'")
@@ -14,7 +14,24 @@ branch_labels = None
 depends_on = None


+def _table_exists(conn, table_name: str) -> bool:
+    """True when the table exists (dual-path convergence, Gate B).
+
+    On a fresh install the automation plugin SQL migration has not run yet
+    when Alembic reaches this revision — skip instead of failing. The
+    plugin-side convergence migration creates the same table.
+    """
+    row = conn.execute(
+        sa.text("SELECT to_regclass(:tname) IS NOT NULL"),
+        {"tname": f"public.{table_name}"},
+    ).scalar()
+    return bool(row)
+
+
 def upgrade() -> None:
+    conn = op.get_bind()
+    if not _table_exists(conn, "automation_agent_runs"):
+        return
    op.create_table(
        "automation_agent_run_steps",
        sa.Column("id", PGUUID(as_uuid=True), primary_key=True),
@@ -18,7 +18,24 @@ branch_labels = None
 depends_on = None


+def _table_exists(conn, table_name: str) -> bool:
+    """True when the table exists (dual-path convergence, Gate B).
+
+    On a fresh install the automation plugin SQL migration has not run yet
+    when Alembic reaches this revision — skip instead of failing. The
+    plugin-side convergence migration adds the same columns.
+    """
+    row = conn.execute(
+        sa.text("SELECT to_regclass(:tname) IS NOT NULL"),
+        {"tname": f"public.{table_name}"},
+    ).scalar()
+    return bool(row)
+
+
 def upgrade() -> None:
+    conn = op.get_bind()
+    if not _table_exists(conn, "automation_agent_definitions"):
+        return
    op.add_column(
        "automation_agent_definitions",
        sa.Column("temperature", sa.Float, nullable=False, server_default="0.3"),
@@ -20,7 +20,27 @@ branch_labels = None
 depends_on = None


+def _table_exists(conn, table_name: str) -> bool:
+    """True when the table exists (dual-path convergence, Gate B).
+
+    On a fresh install the tasks plugin SQL migration has not run yet when
+    Alembic reaches this revision — skip instead of failing. The plugin-side
+    convergence migration adds the same columns/indexes. The legacy-data
+    backfills below only matter for pre-existing rows and are correctly
+    empty on a fresh install.
+    """
+    row = conn.execute(
+        sa.text("SELECT to_regclass(:tname) IS NOT NULL"),
+        {"tname": f"public.{table_name}"},
+    ).scalar()
+    return bool(row)
+
+
 def upgrade() -> None:
+    conn = op.get_bind()
+    if not _table_exists(conn, "tasks"):
+        return
+
    # ── Add new columns to tasks ────────────────────────────────────────────
    op.add_column("tasks", sa.Column("assignee_type", sa.String(20), nullable=False, server_default="user"))
    op.add_column("tasks", sa.Column("assignee_id", PGUUID(as_uuid=True), nullable=True))
@@ -12,6 +12,7 @@ Revises: 0126
 """

 from alembic import op
+import sqlalchemy as sa

 revision = "0127"
 down_revision = "0126"
@@ -19,7 +20,19 @@ branch_labels = None
 depends_on = None


+def _table_exists(conn, table_name: str) -> bool:
+    """True when the table exists (dual-path convergence, Gate B)."""
+    row = conn.execute(
+        sa.text("SELECT to_regclass(:tname) IS NOT NULL"),
+        {"tname": f"public.{table_name}"},
+    ).scalar()
+    return bool(row)
+
+
 def upgrade() -> None:
+    conn = op.get_bind()
+    if not _table_exists(conn, "tasks"):
+        return
    # Drop the FK constraint on tasks.contact_id
    op.drop_constraint("tasks_contact_id_fkey", "tasks", type_="foreignkey")

@@ -9,6 +9,7 @@ Revises: 0128
 """

 from alembic import op
+import sqlalchemy as sa

 revision = "0129"
 down_revision = "0128"
@@ -27,8 +28,25 @@ TABLES_NEEDING_RLS = [
 ]


+def _table_exists(conn, table_name: str) -> bool:
+    """True when the table exists (dual-path convergence, Gate B).
+
+    Plugin-owned tables may not exist yet on a fresh install when Alembic
+    reaches this revision — skip them instead of failing. The plugin-side
+    convergence migrations apply the same RLS policies.
+    """
+    row = conn.execute(
+        sa.text("SELECT to_regclass(:tname) IS NOT NULL"),
+        {"tname": f"public.{table_name}"},
+    ).scalar()
+    return bool(row)
+
+
 def upgrade() -> None:
+    conn = op.get_bind()
    for table in TABLES_NEEDING_RLS:
+        if not _table_exists(conn, table):
+            continue
        op.execute(f"ALTER TABLE {table} ENABLE ROW LEVEL SECURITY;")
        op.execute(
            f"CREATE POLICY tenant_isolation ON {table} "
@@ -37,6 +55,9 @@ def upgrade() -> None:


 def downgrade() -> None:
+    conn = op.get_bind()
    for table in TABLES_NEEDING_RLS:
+        if not _table_exists(conn, table):
+            continue
        op.execute(f"DROP POLICY IF EXISTS tenant_isolation ON {table};")
        op.execute(f"ALTER TABLE {table} DISABLE ROW LEVEL SECURITY;")
@@ -10,6 +10,7 @@ Revises: 0135
 Create Date: 2026-08-21
 """
 from alembic import op
+import sqlalchemy as sa

 revision = "0136"
 down_revision = "0135"
@@ -29,8 +30,25 @@ TABLES_WITH_BAD_RLS = [
 ]


+def _table_exists(conn, table_name: str) -> bool:
+    """True when the table exists (dual-path convergence, Gate B).
+
+    Plugin-owned tables may not exist yet on a fresh install when Alembic
+    reaches this revision — skip them instead of failing. The plugin-side
+    convergence migrations apply the same RLS policies.
+    """
+    row = conn.execute(
+        sa.text("SELECT to_regclass(:tname) IS NOT NULL"),
+        {"tname": f"public.{table_name}"},
+    ).scalar()
+    return bool(row)
+
+
 def upgrade() -> None:
+    conn = op.get_bind()
    for table in TABLES_WITH_BAD_RLS:
+        if not _table_exists(conn, table):
+            continue
        # Drop old policy with app.tenant_id
        op.execute(f"DROP POLICY IF EXISTS tenant_isolation ON {table};")
        # Create new policy with app.current_tenant_id
@@ -41,7 +59,10 @@ def upgrade() -> None:


 def downgrade() -> None:
+    conn = op.get_bind()
    for table in TABLES_WITH_BAD_RLS:
+        if not _table_exists(conn, table):
+            continue
        op.execute(f"DROP POLICY IF EXISTS tenant_isolation ON {table};")
        op.execute(
            f"CREATE POLICY tenant_isolation ON {table} "
@@ -19,7 +19,25 @@ branch_labels = None
 depends_on = None


+def _table_exists(conn, table_name: str) -> bool:
+    """True when the table exists (dual-path convergence, Gate B).
+
+    On a fresh install the tags plugin SQL migration has not run yet when
+    Alembic reaches this revision — skip instead of failing. The plugin-side
+    convergence migration adds the same columns.
+    """
+    row = conn.execute(
+        sa.text("SELECT to_regclass(:tname) IS NOT NULL"),
+        {"tname": f"public.{table_name}"},
+    ).scalar()
+    return bool(row)
+
+
 def upgrade() -> None:
+    conn = op.get_bind()
+    if not _table_exists(conn, "tags"):
+        return
+
    # parent_id for tree structure (self-referencing FK)
    op.add_column("tags", sa.Column("parent_id", PGUUID(as_uuid=True), nullable=True))
    op.create_foreign_key(
@@ -35,6 +53,9 @@ def upgrade() -> None:


 def downgrade() -> None:
+    conn = op.get_bind()
+    if not _table_exists(conn, "tags"):
+        return
    op.drop_column("tags", "icon")
    op.drop_column("tags", "applicable_to")
    op.drop_index("ix_tags_parent", table_name="tags")
@@ -18,11 +18,31 @@ branch_labels = None
 depends_on = None


+def _table_exists(conn, table_name: str) -> bool:
+    """True when the table exists (dual-path convergence, Gate B).
+
+    On a fresh install the report_generator plugin SQL migration has not
+    run yet when Alembic reaches this revision — skip instead of failing.
+    The plugin-side convergence migration adds the same column.
+    """
+    row = conn.execute(
+        sa.text("SELECT to_regclass(:tname) IS NOT NULL"),
+        {"tname": f"public.{table_name}"},
+    ).scalar()
+    return bool(row)
+
+
 def upgrade() -> None:
+    conn = op.get_bind()
+    if not _table_exists(conn, "report_templates"):
+        return
    op.add_column("report_templates", sa.Column("folder_id", PGUUID(as_uuid=True), nullable=True))
    op.create_index("ix_report_templates_folder", "report_templates", ["folder_id"])


 def downgrade() -> None:
+    conn = op.get_bind()
+    if not _table_exists(conn, "report_templates"):
+        return
    op.drop_index("ix_report_templates_folder", table_name="report_templates")
    op.drop_column("report_templates", "folder_id")
@@ -18,11 +18,31 @@ branch_labels = None
 depends_on = None


+def _table_exists(conn, table_name: str) -> bool:
+    """True when the table exists (dual-path convergence, Gate B).
+
+    On a fresh install the kommunikation plugin SQL migration has not run
+    yet when Alembic reaches this revision — skip instead of failing.
+    The plugin-side migration adds the same column idempotently.
+    """
+    row = conn.execute(
+        sa.text("SELECT to_regclass(:tname) IS NOT NULL"),
+        {"tname": f"public.{table_name}"},
+    ).scalar()
+    return bool(row)
+
+
 def upgrade() -> None:
+    conn = op.get_bind()
+    if not _table_exists(conn, "comm_conversations"):
+        return
    op.add_column("comm_conversations", sa.Column("folder_id", PGUUID(as_uuid=True), nullable=True))
    op.create_index("ix_comm_conversations_folder", "comm_conversations", ["folder_id"])


 def downgrade() -> None:
+    conn = op.get_bind()
+    if not _table_exists(conn, "comm_conversations"):
+        return
    op.drop_index("ix_comm_conversations_folder", table_name="comm_conversations")
    op.drop_column("comm_conversations", "folder_id")
@@ -0,0 +1,84 @@
+'''Fix role permission wildcard patterns to canonical 2-segment schema
+
+Revision ID: 0141
+Revises: 0140
+Create Date: 2026-08-23
+
+Migration 0019 seeded default roles with 3-segment permission patterns
+(core:*:read etc.). The runtime matcher (_matches_permission) compares
+segment counts strictly, so those patterns could never match any
+2-segment requirement - editor/viewer roles were silently dead.
+
+Canonical schema is module:action (2 segments, * wildcards allowed).
+core:*:X means all modules with action X, so it converts to *:X.
+'''
+
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = '0141'
+down_revision = '0140'
+branch_labels = None
+depends_on = None
+
+# Rebuild the permissions JSONB object, rewriting every key that starts
+# with the dead 'core:' prefix to its 2-segment equivalent ('*:X').
+_UPGRADE_SQL = '''
+UPDATE roles
+SET permissions = sub.new_perms,
+    permission_version = permission_version + 1
+FROM (
+    SELECT
+        r.id AS role_id,
+        jsonb_object_agg(
+            CASE WHEN k LIKE 'core:%'
+                 THEN '*:' || split_part(k, ':', 3)
+                 ELSE k END,
+            v
+        ) AS new_perms
+    FROM roles r,
+         jsonb_each(r.permissions) AS e(k, v)
+    GROUP BY r.id
+) AS sub
+WHERE roles.id = sub.role_id
+  AND EXISTS (
+      SELECT 1 FROM jsonb_object_keys(roles.permissions) k
+      WHERE k LIKE 'core:%'
+  )
+'''
+
+# Reverse: map '*:X' back to 'core:*:X' only for keys that came from the
+# original seeding pattern. Roles that legitimately use '*:X' without a
+# matching 'core:*:X' history are left untouched (best-effort downgrade).
+_DOWNGRADE_SQL = '''
+UPDATE roles
+SET permissions = sub.new_perms,
+    permission_version = permission_version + 1
+FROM (
+    SELECT
+        r.id AS role_id,
+        jsonb_object_agg(
+            CASE WHEN k = '*:' || split_part(k, ':', 2)
+                  AND k <> '*:*'
+                 THEN 'core:*:' || split_part(k, ':', 2)
+                 ELSE k END,
+            v
+        ) AS new_perms
+    FROM roles r,
+         jsonb_each(r.permissions) AS e(k, v)
+    GROUP BY r.id
+) AS sub
+WHERE roles.id = sub.role_id
+  AND EXISTS (
+      SELECT 1 FROM jsonb_object_keys(roles.permissions) k
+      WHERE k = '*:' || split_part(k, ':', 2) AND k <> '*:*'
+  )
+'''
+
+
+def upgrade() -> None:
+    op.execute(_UPGRADE_SQL)
+
+
+def downgrade() -> None:
+    op.execute(_DOWNGRADE_SQL)
@@ -0,0 +1,39 @@
+"""Add backup config columns to system_settings table.
+
+Follow-up to 0130: the backup feature (10b1f83) added backup_interval,
+backup_retention_days and backup_destination to schema/service/frontend
+but missed model columns and this migration.
+
+Revision ID: 0142
+Revises: 0141
+"""
+
+import sqlalchemy as sa
+
+from alembic import op
+
+revision = "0142"
+down_revision = "0141"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "system_settings",
+        sa.Column("backup_interval", sa.String(20), nullable=False, server_default="daily"),
+    )
+    op.add_column(
+        "system_settings",
+        sa.Column("backup_retention_days", sa.Integer(), nullable=False, server_default="7"),
+    )
+    op.add_column(
+        "system_settings",
+        sa.Column("backup_destination", sa.String(20), nullable=False, server_default="local"),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("system_settings", "backup_destination")
+    op.drop_column("system_settings", "backup_retention_days")
+    op.drop_column("system_settings", "backup_interval")
@@ -17,7 +17,7 @@ from __future__ import annotations

 import logging
 import uuid
-from dataclasses import dataclass, field
+from dataclasses import dataclass
 from typing import Any

 from sqlalchemy import select
@@ -25,8 +25,6 @@ import logging
 import uuid
 from typing import TYPE_CHECKING, Any

-from app.core.sensitive_data import sanitize_dict
-
 if TYPE_CHECKING:
    from sqlalchemy.ext.asyncio import AsyncSession

@@ -20,8 +20,6 @@ from sqlalchemy.ext.asyncio import AsyncSession
 from app.ai.ai_use_case import AIUseCaseMetadata
 from app.core.sensitive_data import (
    SENSITIVE_FIELDS,
-    filter_for_llm_context,
-    get_data_class_for_field,
 )

 logger = logging.getLogger(__name__)
@@ -6,7 +6,6 @@ import uuid
 from dataclasses import dataclass, field
 from typing import Any

-
 LOW_CONFIDENCE_THRESHOLD = 0.6


@@ -7,7 +7,6 @@ from typing import Any

 from app.ai.knowledge_sources import get_source_config

-
 EXTRACTION_TRIGGERS = {
    "mail.received",
    "dms.file_uploaded",
@@ -2,7 +2,7 @@

 from __future__ import annotations

-from dataclasses import dataclass, field
+from dataclasses import dataclass
 from typing import Any


@@ -107,6 +107,10 @@ class Settings(BaseSettings):
    rate_limit_webhook_max: int = 100  # incoming webhooks
    rate_limit_webhook_window: int = 60  # 1 minute

+    # System tenant — used by seeding/plugins that need a well-known default
+    # tenant (must match scripts/seed_admin.py slug).
+    system_tenant_slug: str = "default"
+
    # LLM Cost Overrun Protection (B.17)
    llm_monthly_budget_usd: float = 100.0  # per-tenant monthly LLM budget
    llm_hard_cutoff: bool = True  # block LLM calls when budget exceeded
@@ -85,6 +85,38 @@ def generate_csrf_token() -> str:
    return secrets.token_urlsafe(32)


+async def revoke_user_redis_sessions(user_id: str | uuid.UUID) -> int:
+    """Delete every active Redis session belonging to the user (G2).
+
+    Shared by both password-change paths (token reset + profile/admin change):
+    after a password change, stolen or lingering sessions must die.
+
+    Returns the number of deleted session keys. Never raises — a Redis outage
+    must not break the password change itself.
+    """
+    try:
+        redis = get_redis()
+        deleted = 0
+        async for key in redis.scan_iter(match="session:*", count=100):
+            raw = await redis.get(key)
+            if raw is None:
+                continue
+            try:
+                import json
+
+                session_data = json.loads(raw)
+            except (json.JSONDecodeError, TypeError):
+                continue
+            if session_data.get("user_id") == str(user_id):
+                await redis.delete(key)
+                deleted += 1
+                logger.info("Deleted session %s for user %s", key, user_id)
+        return deleted
+    except Exception:
+        logger.warning("Failed to invalidate Redis sessions for user %s", user_id, exc_info=True)
+        return 0
+
+
 def hash_token(token: str) -> str:
    """SHA-256 hash a token for storage."""
    return hashlib.sha256(token.encode()).hexdigest()
@@ -355,6 +355,23 @@ async def close_engine() -> None:
    _migration_session_factory = None


+async def get_system_tenant(db: AsyncSession):
+    """Return the well-known system tenant, or ``None`` if it does not exist.
+
+    Resolves by configured slug (``settings.system_tenant_slug``, default
+    ``"default"`` as created by ``scripts/seed_admin.py``) instead of an
+    arbitrary first row, so multi-tenant databases stay deterministic.
+    """
+    from sqlalchemy import select
+
+    from app.config import get_settings
+    from app.models.tenant import Tenant  # lazy: models import this module's Base
+
+    slug = get_settings().system_tenant_slug
+    result = await db.execute(select(Tenant).where(Tenant.slug == slug).limit(1))
+    return result.scalar_one_or_none()
+
+
 def reset_engine_for_testing(engine: AsyncEngine) -> async_sessionmaker[AsyncSession]:
    """Replace all global engines with a test engine. Returns a session factory.

@@ -36,7 +36,12 @@ class EventBus:
        self._handlers: dict[str, list[EventHandler]] = defaultdict(list)

    def subscribe(self, event_name: str, handler: EventHandler) -> None:
-        """Subscribe a handler to an event."""
+        """Subscribe a handler to an event.
+
+        Idempotent: subscribing the same handler twice is a no-op
+        (ARCH-020) so double activation cannot fire handlers twice.
+        """
+        if handler not in self._handlers[event_name]:
            self._handlers[event_name].append(handler)

    def unsubscribe(self, event_name: str, handler: EventHandler) -> None:
@@ -153,3 +153,378 @@ async def send_password_reset_email(
 from app.core.job_registry import register_job  # noqa: E402

 register_job("send_password_reset_email", send_password_reset_email)
+
+
+# ── DSAR Processing Job (G1 DSGVO: Art. 15 Auskunft / Art. 17 Löschung) ─────
+
+async def _dsar_collect_user_data(db: Any, tenant_id: str, user_id: str) -> dict[str, Any]:
+    """Collect every data category the dsgvo-export route promises.
+
+    Shared by type=access (full export) so both paths stay consistent.
+    """
+    from datetime import UTC, datetime
+    from uuid import UUID as PyUUID
+
+    from sqlalchemy import or_ as sa_or_
+    from sqlalchemy import select as sa_select
+
+    from app.models.audit import AuditLog
+    from app.models.contact import Contact
+    from app.models.notification import Notification
+    from app.models.user import User
+
+    uid = PyUUID(user_id)
+    tid = PyUUID(tenant_id)
+
+    export_data: dict[str, Any] = {
+        "user_id": user_id,
+        "exported_at": datetime.now(UTC).isoformat(),
+        "legal_basis": "GDPR Art. 15 (access) / Art. 20 (portability)",
+        "data": {},
+    }
+
+    # Profile
+    user = (
+        await db.execute(sa_select(User).where(User.id == uid))
+    ).scalar_one_or_none()
+    if user:
+        export_data["data"]["profile"] = {
+            "email": user.email,
+            "name": user.name,
+            "is_active": user.is_active,
+            "created_at": user.created_at.isoformat() if user.created_at else None,
+        }
+
+    # Contacts owned by the user
+    contacts = (
+        await db.execute(
+            sa_select(Contact).where(
+                Contact.tenant_id == tid,
+                Contact.owner_id == uid,
+                Contact.deleted_at.is_(None),
+            )
+        )
+    ).scalars().all()
+    export_data["data"]["contacts"] = [
+        {
+            "id": str(c.id),
+            "type": c.type,
+            "displayname": c.displayname,
+            "email_1": c.email_1,
+            "email_2": c.email_2,
+        }
+        for c in contacts
+    ]
+
+    # Audit trail entries by/about the user (bounded to keep payloads sane)
+    audit_entries = (
+        await db.execute(
+            sa_select(AuditLog).where(
+                AuditLog.tenant_id == tid,
+                AuditLog.user_id == uid,
+            ).limit(1000)
+        )
+    ).scalars().all()
+    export_data["data"]["audit_log"] = [
+        {
+            "action": a.action,
+            "entity_type": a.entity_type,
+            "timestamp": a.timestamp.isoformat() if a.timestamp else None,
+        }
+        for a in audit_entries
+    ]
+
+    # Notifications addressed to the user
+    notifications = (
+        await db.execute(
+            sa_select(Notification).where(
+                Notification.tenant_id == tid,
+                Notification.owner_id == uid,
+            ).limit(1000)
+        )
+    ).scalars().all()
+    export_data["data"]["notifications"] = [
+        {
+            "id": str(n.id),
+            "type": getattr(n, "type", None),
+            "title": getattr(n, "title", None),
+            "created_at": n.created_at.isoformat() if n.created_at else None,
+        }
+        for n in notifications
+    ]
+
+    # ── Categories promised by the dsgvo-export route docstring ──
+    # (G1-b: mail accounts, tasks, calendar entries, comm messages)
+    try:
+        from app.plugins.builtins.mail.models import MailAccount
+
+        mail_accounts = (
+            await db.execute(
+                sa_select(MailAccount).where(
+                    MailAccount.tenant_id == tid,
+                    MailAccount.user_id == uid,
+                ).limit(500)
+            )
+        ).scalars().all()
+        export_data["data"]["mail_accounts"] = [
+            {
+                "id": str(a.id),
+                "email_address": a.email_address,
+                "display_name": a.display_name,
+                "is_shared": a.is_shared,
+                "is_active": a.is_active,
+            }
+            for a in mail_accounts
+        ]
+    except ImportError:
+        pass
+
+    try:
+        from app.plugins.builtins.tasks.models import Task as TaskModel
+
+        tasks = (
+            await db.execute(
+                sa_select(TaskModel).where(
+                    sa_or_(TaskModel.owner_id == uid, TaskModel.assigned_to == uid),
+                    TaskModel.tenant_id == tid,
+                    TaskModel.deleted_at.is_(None),
+                ).limit(1000)
+            )
+        ).scalars().all()
+        export_data["data"]["tasks"] = [
+            {
+                "id": str(t.id),
+                "title": t.title,
+                "status": t.status,
+                "priority": t.priority,
+                "due_date": t.due_date.isoformat() if t.due_date else None,
+            }
+            for t in tasks
+        ]
+    except ImportError:
+        pass
+
+    try:
+        from app.plugins.builtins.calendar.models import CalendarEntry as CalEntry
+
+        cal_entries = (
+            await db.execute(
+                sa_select(CalEntry).where(
+                    CalEntry.tenant_id == tid,
+                    CalEntry.owner_id == uid,
+                    CalEntry.deleted_at.is_(None),
+                ).limit(1000)
+            )
+        ).scalars().all()
+        export_data["data"]["calendar_entries"] = [
+            {
+                "id": str(e.id),
+                "title": e.title,
+                "entry_type": e.entry_type,
+                "start_at": e.start_at.isoformat() if e.start_at else None,
+                "end_at": e.end_at.isoformat() if e.end_at else None,
+            }
+            for e in cal_entries
+        ]
+    except ImportError:
+        pass
+
+    try:
+        from app.plugins.builtins.kommunikation.models import CommMessage
+
+        comm_messages = (
+            await db.execute(
+                sa_select(CommMessage).where(
+                    CommMessage.sender_id == uid,
+                    CommMessage.tenant_id == tid,
+                ).limit(1000)
+            )
+        ).scalars().all()
+        export_data["data"]["comm_messages"] = [
+            {
+                "id": str(m.id),
+                "sender_type": m.sender_type,
+                "content": m.content[:500],
+                "created_at": m.created_at.isoformat() if m.created_at else None,
+            }
+            for m in comm_messages
+        ]
+    except ImportError:
+        pass
+
+    return export_data
+
+
+async def _dsar_execute_deletion(db: Any, tenant_id: str, user_id: str) -> dict[str, int]:
+    """Execute GDPR Art. 17 erasure for a user within one tenant.
+
+    Strategy (respects retention duties):
+    - Contacts owned by the user → soft-delete via deleted_at
+      (audit history must remain intact — it is not personal data of the
+       subject but business record; retention policy governs its cleanup)
+    - Notifications owned by the user → hard delete
+    - User account → deactivate (is_active=False), clear personal fields,
+      scramble password hash and email (keeps FK integrity for audit rows)
+    Returns counters for the audit entry.
+    """
+    from datetime import UTC, datetime
+    from uuid import UUID as PyUUID
+
+    from sqlalchemy import select as sa_select
+    from sqlalchemy import update as sa_update
+
+    from app.core.audit import log_audit
+    from app.models.contact import Contact
+    from app.models.notification import Notification
+    from app.models.user import User
+
+    uid = PyUUID(user_id)
+    tid = PyUUID(tenant_id)
+
+    counts: dict[str, int] = {}
+
+    # 1. Soft-delete contacts owned by the user
+    contact_result = await db.execute(
+        sa_select(Contact).where(
+            Contact.tenant_id == tid,
+            Contact.owner_id == uid,
+            Contact.deleted_at.is_(None),
+        )
+    )
+    contacts = contact_result.scalars().all()
+    for c in contacts:
+        c.deleted_at = datetime.now(UTC)
+    counts["contacts_soft_deleted"] = len(contacts)
+
+    # 2. Hard-delete notifications owned by the user
+    notif_result = await db.execute(
+        sa_select(Notification).where(
+            Notification.tenant_id == tid,
+            Notification.owner_id == uid,
+        )
+    )
+    notifications = notif_result.scalars().all()
+    for n in notifications:
+        await db.delete(n)
+    counts["notifications_deleted"] = len(notifications)
+
+    # 3. Anonymize + deactivate the account (FK integrity for audit rows kept)
+    await db.execute(
+        sa_update(User)
+        .where(User.id == uid)
+        .values(
+            email=f"erased.{uid.hex[:16]}@anonymized.invalid",
+            name="[gelöscht gemäß DSGVO Art. 17]",
+            first_name=None,
+            last_name=None,
+            avatar_url=None,
+            password_hash="!dsar-erased",
+            is_active=False,
+            preferences={},
+        )
+    )
+    counts["user_anonymized"] = 1
+
+    # 4. Audit the erasure itself (who/what/when — required by Art. 17 recital)
+    await log_audit(
+        db,
+        tid,
+        user_id,
+        "dsar_erasure",
+        "user",
+        uid,
+        {"target_user": user_id, **counts},
+    )
+    return counts
+
+
+async def process_dsar(
+    ctx: dict[str, Any],
+    *,
+    user_id: str,
+    tenant_id: str,
+    request_type: str,
+) -> dict[str, Any]:
+    """Process a GDPR Data Subject Access Request (DSAR).
+
+    ARQ worker function registered as "process_dsar".
+
+    request_type:
+      - "access": collect all data categories (Art. 15/20) and post a system
+        message that the export is ready (served via the existing dsgvo-export
+        endpoint).
+      - "deletion": execute Art. 17 erasure (soft-delete contacts, hard-delete
+        notifications, anonymize+deactivate account) and audit it.
+      - "rectification": post a system message asking admins to handle the
+        correction manually.
+
+    Returns a summary dict for the job result.
+    """
+    import logging
+    import uuid as uuid_module
+
+    from app.core.db import get_worker_session_factory
+    from app.core.notifications import post_system_message
+
+    logger = logging.getLogger(__name__)
+    tid = uuid_module.UUID(tenant_id)
+    uid = uuid_module.UUID(user_id)
+
+    factory = get_worker_session_factory()
+    async with factory() as db:
+        try:
+            if request_type == "access":
+                data = await _dsar_collect_user_data(db, tenant_id, user_id)
+                await db.commit()
+                categories = list(data.get("data", {}).keys())
+                await post_system_message(
+                    db,
+                    tid,
+                    uid,
+                    "dsar_access_ready",
+                    "DSGVO-Auskunft bereit",
+                    f"Datenkategorien: {', '.join(categories)}",
+                    severity="info",
+                )
+                await db.commit()
+                logger.info("DSAR access processed for user %s", user_id)
+                return {"type": request_type, "status": "completed", "categories": categories}
+
+            if request_type == "deletion":
+                counts = await _dsar_execute_deletion(db, tenant_id, user_id)
+                await db.commit()
+                await post_system_message(
+                    db,
+                    tid,
+                    uid,
+                    "dsar_deletion_done",
+                    "DSGVO-Löschung ausgeführt",
+                    f"Kontakten soft-gelöscht: {counts.get('contacts_soft_deleted', 0)}; Konto anonymisiert.",
+                    severity="info",
+                )
+                await db.commit()
+                logger.info("DSAR deletion executed for user %s: %s", user_id, counts)
+                return {"type": request_type, "status": "completed", **counts}
+
+            if request_type == "rectification":
+                await post_system_message(
+                    db,
+                    tid,
+                    uid,
+                    "dsar_rectification_requested",
+                    "DSGVO-Berichtigung angefordert",
+                    f"Manuelle Bearbeitung für User {user_id} erforderlich.",
+                    severity="warning",
+                )
+                await db.commit()
+                logger.info("DSAR rectification requested for user %s", user_id)
+                return {"type": request_type, "status": "queued_for_manual_handling"}
+
+            logger.warning("Unknown DSAR request_type '%s' for user %s", request_type, user_id)
+            return {"type": request_type, "status": "unknown_type"}
+        except Exception:
+            await db.rollback()
+            raise
+
+
+register_job("process_dsar", process_dsar)
@@ -3,6 +3,8 @@
 from __future__ import annotations

 import logging
+import re
+import uuid as uuid_mod

 from fastapi import Request, status
 from starlette.middleware.base import BaseHTTPMiddleware
@@ -137,3 +139,97 @@ class CSRFMiddleware(BaseHTTPMiddleware):
                pass

        return await call_next(request)
+
+
+class AuditMiddleware(BaseHTTPMiddleware):
+    """Safety-net audit trail for ALL successful mutating requests.
+
+    AGENTS.md requires every mutation to produce an audit entry. Explicit
+    ``log_audit`` calls in routes/services remain the detail layer (entity ids,
+    change diffs); this middleware guarantees a baseline entry for mutations
+    that lack one, marked with ``source=middleware`` in ``details``.
+
+    Best-effort by design: audit failures never break the request.
+    """
+
+    _MUTATING = {"POST", "PUT", "PATCH", "DELETE"}
+    _SKIP_PREFIXES = (
+        "/api/v1/auth",
+        "/api/v1/health",
+        "/api/v1/errors",
+        "/api/v1/audit",
+        "/api/v1/external",
+    )
+
+    async def dispatch(self, request: Request, call_next):
+        response = await call_next(request)
+
+        if request.method not in self._MUTATING:
+            return response
+        if response.status_code < 200 or response.status_code >= 300:
+            return response
+        path = request.url.path
+        if any(path.startswith(p) for p in self._SKIP_PREFIXES):
+            return response
+
+        try:
+            await self._write_entry(request, path, response.status_code)
+        except Exception:
+            logging.getLogger(__name__).debug(
+                "AuditMiddleware: failed to write baseline entry for %s %s", request.method, path
+            )
+        return response
+
+    @staticmethod
+    def _derive_entity_type(path: str) -> str:
+        """Derive an entity_type from the second URL segment."""
+        parts = [p for p in path.split("/") if p]
+        # /api/v1/<resource>/... -> resource; singularize naive trailing 's'
+        resource = parts[2] if len(parts) > 2 and parts[0] == "api" and parts[1] == "v1" else (parts[0] if parts else "unknown")
+        return resource[:-1] if len(resource) > 3 and resource.endswith("s") else resource
+
+    async def _write_entry(self, request: Request, path: str, status_code: int) -> None:
+        from app.core.audit import log_audit
+        from app.core.auth import get_redis, get_session_data
+        from app.core.db import create_db_session
+
+        # Attribute via the Redis session (same source as CSRFMiddleware) —
+        # FastAPI dependencies run after middleware, so request.state is empty here.
+        settings = get_settings()
+        session_id = request.cookies.get(settings.session_cookie_name)
+        if not session_id:
+            return  # unauthenticated — nothing to attribute
+        redis = get_redis()
+        session_data = await get_session_data(redis, session_id)
+        if not session_data:
+            return
+        tenant_raw = session_data.get("tenant_id")
+        user_raw = session_data.get("user_id")
+        if not tenant_raw:
+            return
+
+        action_map = {"POST": "create", "PATCH": "update", "PUT": "update", "DELETE": "delete"}
+        entity_id: uuid_mod.UUID | None = None
+        parts = [p for p in path.split("/") if p]
+        if parts and re.fullmatch(r"[0-9a-fA-F-]{36}", parts[-1]):
+            try:
+                entity_id = uuid_mod.UUID(parts[-1])
+            except ValueError:
+                entity_id = None
+
+        async with create_db_session(uuid_mod.UUID(tenant_raw)) as db:
+            await log_audit(
+                db,
+                uuid_mod.UUID(tenant_raw),
+                uuid_mod.UUID(user_raw) if user_raw else None,
+                action_map.get(request.method, request.method.lower()),
+                self._derive_entity_type(path),
+                entity_id,
+                changes={
+                    "source": "middleware",
+                    "method": request.method,
+                    "path": path,
+                    "status": status_code,
+                },
+            )
+            await db.commit()
@@ -54,6 +54,8 @@ CORE_PERMISSIONS: list[dict[str, str]] = [
    {"key": "taxes:write", "label": "Taxes: Write", "category": "core", "module": "taxes"},
    {"key": "currencies:read", "label": "Currencies: Read", "category": "core", "module": "currencies"},
    {"key": "currencies:write", "label": "Currencies: Write", "category": "core", "module": "currencies"},
+    {"key": "custom_fields:read", "label": "Custom Fields: Read", "category": "core", "module": "custom_fields"},
+    {"key": "custom_fields:write", "label": "Custom Fields: Write", "category": "core", "module": "custom_fields"},
    {"key": "import_export:read", "label": "Import/Export: Read", "category": "core", "module": "import_export"},
    {"key": "import_export:write", "label": "Import/Export: Write", "category": "core", "module": "import_export"},
    {"key": "workspaces:read", "label": "Workspaces: Read", "category": "core", "module": "workspaces"},
@@ -29,6 +29,14 @@ class ServiceContainer:
        """Check if a service is registered."""
        return name in self._services

+    def remove(self, name: str) -> None:
+        """Remove a service registration (no-op if absent).
+
+        Used by plugin deactivation hooks to clean up services they
+        registered during activation.
+        """
+        self._services.pop(name, None)
+
    async def initialize(self) -> None:
        """Initialize core services."""
        if self._initialized:
@@ -501,11 +501,38 @@ async def save_with_metadata(
    }


+async def get_file_metadata_async(path: str) -> dict[str, Any]:
+    """Awaitable variant of :func:`get_file_metadata` (ARCH-052).
+
+    Safe to call from inside a running event loop — never creates a
+    nested one. For local storage this is plain filesystem access; for
+    S3 and other async backends the backend's ``exists()`` is awaited.
+    """
+    backend = get_storage_backend()
+    if isinstance(backend, LocalStorage):
+        full_path = backend._full_path(path)
+        if not os.path.exists(full_path):
+            return {"size": None, "modified": None, "exists": False}
+        stat = os.stat(full_path)
+        return {
+            "size": stat.st_size,
+            "modified": stat.st_mtime,
+            "exists": True,
+        }
+    # S3 or other async backends — await the backend directly
+    if not await backend.exists(path):
+        return {"size": None, "modified": None, "exists": False}
+    return {"size": None, "modified": None, "exists": True}
+
+
 def get_file_metadata(path: str) -> dict[str, Any]:
    """Read metadata of a stored file without loading its content.

-    Works with the *local* storage backend.  For S3, use the S3 client
-    ``stat_object`` API directly.
+    Works with the *local* storage backend without touching the event
+    loop.  For S3 and other async-only backends this drives the check
+    through ``asyncio.run``; calling it from inside a running event loop
+    raises ``RuntimeError`` — use :func:`get_file_metadata_async` there
+    instead (ARCH-052).

    Parameters
    ----------
@@ -530,14 +557,15 @@ def get_file_metadata(path: str) -> dict[str, Any]:
            "modified": stat.st_mtime,
            "exists": True,
        }
-    # S3 or other backends — fall back to exists() check
-    import asyncio as _asyncio
-
-    loop = _asyncio.new_event_loop()
+    # Async-only backend outside a running loop is fine; inside one we
+    # must never build a nested event loop.
    try:
-        exists = loop.run_until_complete(backend.exists(path))
-        if not exists:
-            return {"size": None, "modified": None, "exists": False}
-        return {"size": None, "modified": None, "exists": True}
-    finally:
-        loop.close()
+        asyncio.get_running_loop()
+    except RuntimeError:
+        pass
+    else:
+        raise RuntimeError(
+            "get_file_metadata() cannot be used with async storage backends "
+            "inside a running event loop — use get_file_metadata_async()"
+        )
+    return asyncio.run(get_file_metadata_async(path))
@@ -121,11 +121,14 @@ class TriggerDispatcher:
        """Query DB for active automations matching *event_name* and dispatch."""
        from app.core.db import get_session_factory
        from app.plugins.builtins.contracts import get_contract
+        # None-check FIRST — accessing attributes on the contract before the
+        # check crashed with AttributeError when automation was inactive
+        # (ARCH-029/041).
        automation_contract = get_contract("automation")
-        AutomationDefinition = automation_contract.Automation  # noqa: N806
        if automation_contract is None:
            logger.debug("Automation plugin not available — trigger skipped")
            return
+        AutomationDefinition = automation_contract.Automation  # noqa: N806

        factory = get_session_factory()
        tenant_id = payload.get("tenant_id")
@@ -170,12 +170,7 @@ async def on_startup(ctx: dict[str, Any]) -> None:
        if search_contract is not None:
            factory = async_session
            async with factory() as db:
-                # auto_register_providers is not exposed via contract yet;
-                # use the contract's get_search_registry to access providers
-                from app.plugins.builtins.unified_search.provider_registry import (
-                    auto_register_providers,
-                )
-                await auto_register_providers(db)
+                await search_contract.auto_register_providers(db)
            logger.info("Search providers registered for worker")
        else:
            logger.debug("Unified search plugin not available — skipping provider registration")
@@ -350,8 +345,10 @@ async def cleanup_audit_log_job(ctx: dict[str, Any]) -> None:
    Runs daily to prevent the audit_log table from growing indefinitely.
    Iterates per-tenant for RLS compliance.
    """
-    from sqlalchemy import text as sa_text, delete as sa_delete
-    from datetime import datetime, timedelta
+    from datetime import UTC, datetime, timedelta
+
+    from sqlalchemy import delete as sa_delete
+    from sqlalchemy import text as sa_text

    from app.core.db import get_worker_session_factory
    from app.models.audit import AuditLog
@@ -362,7 +359,7 @@ async def cleanup_audit_log_job(ctx: dict[str, Any]) -> None:
            tenant_result = await db.execute(sa_text("SELECT id FROM tenants"))
            tenant_ids = [row[0] for row in tenant_result]

-            cutoff = datetime.utcnow() - timedelta(days=365)
+            cutoff = datetime.now(UTC) - timedelta(days=365)
            total_deleted = 0
            for tenant_id in tenant_ids:
                await db.execute(
@@ -393,8 +390,10 @@ async def cleanup_trash_job(ctx: dict[str, Any]) -> None:
    Runs daily to clean up the trash. Iterates per-tenant for RLS compliance.
    Default retention: 90 days in trash before permanent deletion.
    """
-    from sqlalchemy import text as sa_text, delete as sa_delete
-    from datetime import datetime, timedelta
+    from datetime import UTC, datetime, timedelta
+
+    from sqlalchemy import delete as sa_delete
+    from sqlalchemy import text as sa_text

    from app.core.db import get_worker_session_factory
    from app.models.contact import Contact
@@ -406,7 +405,7 @@ async def cleanup_trash_job(ctx: dict[str, Any]) -> None:
            tenant_result = await db.execute(sa_text("SELECT id FROM tenants"))
            tenant_ids = [row[0] for row in tenant_result]

-            cutoff = datetime.utcnow() - timedelta(days=90)
+            cutoff = datetime.now(UTC) - timedelta(days=90)
            total_deleted = 0

            for tenant_id in tenant_ids:
@@ -17,8 +17,9 @@ from app.core.db import get_db, set_tenant_context, set_user_context

 logger = logging.getLogger(__name__)

-# Known write-permission modules — used by require_write() to check
-# specific permissions instead of broad wildcards like *:write
+# Legacy fallback list — used by require_write() only when the permission
+# registry is not initialized. The live source of truth is generated from
+# the registry (see _get_write_permissions, ARCH-022).
 _WRITE_PERMISSIONS = [
    "users:write",
    "roles:write",
@@ -35,6 +36,30 @@ _WRITE_PERMISSIONS = [
 ]


+def _get_write_permissions() -> list[str]:
+    """Return all known ``module:write`` permission keys (ARCH-022).
+
+    Generated from the permission registry so plugin write permissions are
+    picked up automatically without touching this file. Falls back to the
+    static legacy list when the registry is unavailable/uninitialized.
+    """
+    try:
+        from app.core.permission_registry import get_permission_registry
+
+        registry = get_permission_registry()
+        if getattr(registry, "_initialized", False):
+            perms = [
+                entry["key"]
+                for entry in registry.get_all()
+                if entry["key"].endswith(":write")
+            ]
+            if perms:
+                return sorted(perms)
+    except Exception:
+        pass
+    return list(_WRITE_PERMISSIONS)
+
+
 async def get_redis_dep() -> aioredis.Redis:
    """FastAPI dependency for Redis client."""
    return get_redis()
@@ -261,7 +286,7 @@ async def require_write(
    # Check via permission system for specific write permissions
    from app.core.permissions import check_permission

-    for perm in _WRITE_PERMISSIONS:
+    for perm in _get_write_permissions():
        if check_permission(current_user, perm):
            return current_user

@@ -22,8 +22,12 @@ logger = logging.getLogger(__name__)

 from app.config import get_settings  # noqa: E402
 from app.core.db import close_engine, get_engine  # noqa: E402
-from app.core.error_codes import ApiError, build_error_response  # noqa: E402
-from app.core.middleware import CSRFMiddleware, SecurityHeadersMiddleware  # noqa: E402
+from app.core.error_codes import ERROR_CODES, ApiError, build_error_response  # noqa: E402
+from app.core.middleware import (  # noqa: E402
+    AuditMiddleware,
+    CSRFMiddleware,
+    SecurityHeadersMiddleware,
+)
 from app.core.monitoring import record_error, record_request  # noqa: E402
 from app.core.rate_limit import GeneralRateLimitMiddleware  # noqa: E402
 from app.core.resilience import CircuitBreakerMiddleware  # noqa: E402
@@ -36,16 +40,14 @@ from app.routes import (  # noqa: E402
    attachments,
    audit,
    auth,
-    compliance,
    backups,
    bank_accounts,
-    contact_folder_permissions,
-    contact_folders,
-    contacts,
+    compliance,
    currencies,
    custom_field_definitions,
    custom_fields,
    dashboard,
+    delegations,
    entity_history,
    entity_permissions,
    errors,
@@ -59,7 +61,6 @@ from app.routes import (  # noqa: E402
    owner_transfer,
    permission_templates,
    plugins,
-    delegations,
    policies,
    roles,
    saved_filters,
@@ -284,22 +285,23 @@ async def lifespan(app: FastAPI):
                logger.info(f"Plugin {name} is inactive — skipping activation")
                continue

-            # Activate plugin with a FRESH session per plugin to avoid RLS state leakage
-            # RLS fail-closed requires app.current_tenant_id for tenant-table writes.
-            # Plugin activation may fail on duplicate cron job inserts — this is harmless
-            # since cron jobs already exist from previous startups.
+            # Activate plugin ONCE per process (ARCH-002 fix): a fresh session with
+            # the first tenant's RLS context satisfies fail-closed RLS for any
+            # tenant-table writes during activation. Plugins that need per-tenant
+            # data must seed it themselves (e.g. via the default-tenant mechanism).
+            # Calling on_activate once prevents duplicate event listeners, cron
+            # jobs, mini-apps and other contributions at multi-tenant startups.
            plugin_activated = False
-            for tenant_id in all_tenant_ids:
+            if all_tenant_ids:
                try:
                    async with async_session() as plugin_db:
-                        await set_tenant_context(plugin_db, tenant_id)
+                        await set_tenant_context(plugin_db, all_tenant_ids[0])
                        await plugin.on_activate(plugin_db, container, event_bus)
                        await plugin_db.flush()
                        await plugin_db.commit()
                    plugin_activated = True
                except Exception as exc:
-                    logger.warning(f"[STARTUP] Plugin {name} activation issue for tenant {tenant_id}: {exc}")
-                    break
+                    logger.warning(f"[STARTUP] Plugin {name} activation issue: {exc}")

            if plugin_activated:
                plugin_record.status = "active"
@@ -474,6 +476,7 @@ def create_app() -> FastAPI:
    )
    app.add_middleware(CSRFMiddleware)
    app.add_middleware(SecurityHeadersMiddleware)
+    app.add_middleware(AuditMiddleware)
    app.add_middleware(GeneralRateLimitMiddleware)
    app.add_middleware(RequestLoggingMiddleware)
    app.add_middleware(CircuitBreakerMiddleware)
@@ -516,6 +519,21 @@ def create_app() -> FastAPI:
            504: "service_timeout",
        }
        code = status_to_code.get(exc.status_code, "internal_error" if exc.status_code >= 500 else "validation_error")
+        # Structured detail passthrough (AGENTS.md): when a route raises
+        # HTTPException with a dict detail containing a machine-readable ``code``,
+        # preserve the structured shape instead of stringifying it.
+        raw_detail = exc.detail
+        if isinstance(raw_detail, dict):
+            inner_code = raw_detail.get("code", code)
+            body = build_error_response(
+                code=inner_code if inner_code in ERROR_CODES else code,
+                detail=raw_detail.get("detail") or str(raw_detail),
+                trace_id=trace_id,
+            )
+            # Preserve the full structured detail as a nested object so clients
+            # can read ``resp.json()["detail"]["code"]``.
+            body["detail"] = raw_detail
+        else:
            body = build_error_response(
                code=code,
                detail=str(exc.detail) if exc.detail else None,
@@ -544,11 +562,9 @@ def create_app() -> FastAPI:
    app.include_router(groups.router)
    app.include_router(tenants.router)
    app.include_router(notifications.router)
-    from app.routes.companies import router as companies_router
-    app.include_router(companies_router)
-    app.include_router(contacts.router)
-    app.include_router(contact_folders.router)
-    app.include_router(contact_folder_permissions.router)
+    # NOTE: contacts/companies/contact-folders routes are plugin-owned now
+    # (Block B1) and mounted via the manifest.routes mechanism below with
+    # require_active_plugin("contacts") protection.
    app.include_router(entity_permissions.router)
    app.include_router(dashboard.router)
    app.include_router(entity_history.router)
@@ -6,8 +6,8 @@ from app.models.audit import AuditLog
 from app.models.auth import ApiToken, PasswordResetToken
 from app.models.backup import Backup
 from app.models.bank_account import BankAccount
-from app.models.consumer_inbox import ConsumerInbox
 from app.models.compliance import ComplianceIncident
+from app.models.consumer_inbox import ConsumerInbox
 from app.models.contact import Contact, ContactPerson
 from app.models.contact_folder import ContactFolder
 from app.models.contact_merge import ContactMergeHistory
@@ -11,13 +11,12 @@ from datetime import datetime
 from typing import Any

 from sqlalchemy import DateTime, ForeignKey, String, func
-from sqlalchemy.dialects.postgresql import JSONB
+from sqlalchemy.dialects.postgresql import JSONB, TSVECTOR
 from sqlalchemy.dialects.postgresql import UUID as PGUUID
 from sqlalchemy.orm import Mapped, mapped_column

 from app.core.db import Base, TenantMixin
 from app.models.owned_mixin import OwnedMixin
-from sqlalchemy.dialects.postgresql import TSVECTOR

 # Re-export EntityHistory as DeletionLog for backward compatibility.
 # Tests import DeletionLog from app.models.audit and use entity_snapshot attribute.
@@ -5,7 +5,7 @@ from __future__ import annotations
 import uuid
 from datetime import datetime

-from sqlalchemy import DateTime, Integer, String, Text, func
+from sqlalchemy import DateTime, ForeignKey, Integer, String, Text, UniqueConstraint, func
 from sqlalchemy.dialects.postgresql import JSONB
 from sqlalchemy.dialects.postgresql import UUID as PGUUID
 from sqlalchemy.orm import Mapped, mapped_column
@@ -77,3 +77,49 @@ class EventOutbox(Base):
    failed_at: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True), nullable=True,
    )
+
+
+class OutboxDelivery(Base):
+    """Per-consumer delivery status for an event_outbox row (Migration 0075).
+
+    Tracks whether each consumer successfully processed an event; an event is
+    only 'published' when all mandatory deliveries succeed.
+    """
+
+    __tablename__ = "outbox_deliveries"
+    __table_args__ = (
+        UniqueConstraint(
+            "event_id", "consumer_name",
+            name="uq_outbox_deliveries_event_consumer",
+        ),
+    )
+
+    id: Mapped[uuid.UUID] = mapped_column(
+        PGUUID(as_uuid=True), primary_key=True,
+        server_default=func.gen_random_uuid(),
+    )
+    event_id: Mapped[uuid.UUID] = mapped_column(
+        PGUUID(as_uuid=True),
+        ForeignKey("event_outbox.id", ondelete="CASCADE"),
+        nullable=False,
+    )
+    consumer_name: Mapped[str] = mapped_column(String(150), nullable=False)
+    status: Mapped[str] = mapped_column(
+        String(30), nullable=False, server_default="pending",
+    )
+    attempt_count: Mapped[int] = mapped_column(
+        Integer, nullable=False, server_default="0",
+    )
+    next_attempt_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True,
+    )
+    last_error: Mapped[str | None] = mapped_column(Text, nullable=True)
+    processed_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True,
+    )
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), nullable=False, server_default=func.now(),
+    )
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), nullable=False, server_default=func.now(),
+    )
@@ -53,6 +53,9 @@ class SystemSettings(Base, TenantMixin, OwnedMixin):
    theme_border_radius: Mapped[str] = mapped_column(String(20), nullable=False, default="0.5rem")
    # Backup configuration
    backup_enabled: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False, server_default="false")
+    backup_interval: Mapped[str] = mapped_column(String(20), nullable=False, default="daily", server_default="daily")
+    backup_retention_days: Mapped[int] = mapped_column(Integer, nullable=False, default=7, server_default="7")
+    backup_destination: Mapped[str] = mapped_column(String(20), nullable=False, default="local", server_default="local")
    # Automation plugin settings (JSONB)
    automation_config: Mapped[dict | None] = mapped_column(JSONB, nullable=True)
    # Retention policy overrides (JSONB) — compliance module
@@ -12,7 +12,6 @@ from sqlalchemy.dialects.postgresql import UUID as PGUUID
 from sqlalchemy.orm import Mapped, mapped_column

 from app.core.db import Base, SoftDeleteMixin, TimestampMixin
-from app.models.owned_mixin import OwnedMixin


 class User(Base, TimestampMixin, SoftDeleteMixin):
@@ -97,6 +97,15 @@ class BasePlugin(ABC):
        """
        return []

+    async def register_event_handlers(self, event_bus: EventBus) -> None:
+        """Register event handlers for the background worker (ARCH-038 hook).
+
+        The worker calls this on every active plugin at startup so plugins
+        can subscribe to events even when the web process is separate.
+        Default: no-op. Override to subscribe handlers.
+        """
+        return None
+
    # ─── Job Modules ───

    def get_job_modules(self) -> list[str]:
@@ -12,7 +12,6 @@ from sqlalchemy.orm import Mapped, mapped_column

 from app.core.db import Base, TenantMixin
 from app.models.owned_mixin import OwnedMixin
-from pgvector.sqlalchemy import Vector


 class AgentMemory(Base, TenantMixin, OwnedMixin):
@@ -22,6 +22,7 @@ from app.plugins.builtins.ai_assistant.schemas import (
    ExternalAgentRequest,
    ExternalAgentResponse,
 )
+from app.plugins.builtins.ai_assistant.services import stream_chat_comm as stream_chat

 logger = logging.getLogger(__name__)

@@ -120,13 +121,18 @@ async def run_agent_external(
    }

    # Run the agent via streaming chat (non-streaming mode)
-    from app.plugins.builtins.ai_assistant.services import stream_chat_comm

    full_response = ""
    async with get_db() as stream_db:
        await set_tenant_context(stream_db, tenant_id)
        async for chunk in stream_chat(
-            stream_db, session, agent, data.message, user_context, tenant_id
+            stream_db,
+            session.id,
+            agent,
+            data.message,
+            user_context,
+            tenant_id,
+            uuid.UUID(current_user["user_id"]),
        ):
            if chunk.startswith("data: ") and chunk != "data: [DONE]\n\n":
                try:
@@ -0,0 +1,10 @@
+-- Dual-path convergence (Gate B): add compliance columns that Alembic
+-- migration 0119 adds on the core path. Idempotent so both install paths
+-- converge to the identical schema.
+ALTER TABLE ai_providers ADD COLUMN IF NOT EXISTS region VARCHAR(20) NOT NULL DEFAULT 'unknown';
+ALTER TABLE ai_providers ADD COLUMN IF NOT EXISTS hosting_type VARCHAR(30) NOT NULL DEFAULT 'cloud';
+ALTER TABLE ai_providers ADD COLUMN IF NOT EXISTS dpa_status VARCHAR(20) NOT NULL DEFAULT 'none';
+ALTER TABLE ai_providers ADD COLUMN IF NOT EXISTS retention_policy TEXT NOT NULL DEFAULT '';
+ALTER TABLE ai_providers ADD COLUMN IF NOT EXISTS training_on_customer_data BOOLEAN NOT NULL DEFAULT FALSE;
+ALTER TABLE ai_providers ADD COLUMN IF NOT EXISTS transfer_notice TEXT NOT NULL DEFAULT '';
+ALTER TABLE ai_providers ADD COLUMN IF NOT EXISTS allowed_data_classes JSONB NOT NULL DEFAULT '[]'::jsonb;
@@ -42,7 +42,7 @@ class AIAssistantPlugin(BasePlugin):
            ),
        ],
        events=[],
-        migrations=["0001_initial.sql", "0002_folders_attachments.sql"],
+        migrations=["0001_initial.sql", "0002_folders_attachments.sql", "0003_sort_order.sql", "0004_compliance_fields.sql"],
        permissions=[
            "ai:read",
            "ai:write",
@@ -52,10 +52,10 @@ class AIAssistantPlugin(BasePlugin):
        ],
        is_core=True,
        menu_items=[
-            FrontendMenuItem(label_key='nav.aiAssistant', label='KI Assistent', path='/ai-assistant', icon='Bot', order=90),
+            FrontendMenuItem(label_key='nav.aiAssistant', label='KI Assistent', path='/ai-assistant', icon='Bot', order=90, permission='ai:read'),
        ],
        page_routes=[
-            FrontendPageRoute(path='/ai-assistant', component='@/pages/AIAssistant', protected=True),
+            FrontendPageRoute(path='/ai-assistant', component='@/pages/AIAssistant', protected=True, permission='ai:read'),
        ],
        settings_pages=[
            FrontendSettingsPage(path='ai', label_key='settings.ai', label='AI Settings', component='@/pages/AISettings', icon='Bot', order=60),
@@ -165,8 +165,8 @@ async def get_open_tasks_handler(arguments: dict[str, Any], context: dict[str, A

        from app.plugins.builtins.calendar.contracts import get_contract as get_calendar_contract
        _cal = get_calendar_contract()
-        calendar_entry = _cal.calendar_entry
-        calendar_entry_link = _cal.calendar_entry_link
+        calendar_entry = _cal.CalendarEntry
+        calendar_entry_link = _cal.CalendarEntryLink

        db, tenant_id, _ = await _get_db_and_tenant(context)
        entity_type = arguments["entity_type"]
@@ -69,10 +69,12 @@ async def push_suggestion(user_id: str, suggestion: dict[str, Any]) -> None:
    # Post suggestion to Communication (I-WORK-PROACTIVE)
    try:
        import uuid as uuid_mod
+
+        from sqlalchemy import select as sa_select
+
+        from app.core.db import get_worker_session_factory
        from app.plugins.builtins.contracts import get_contract_registry
        from app.plugins.builtins.kommunikation.models import CommConversation
-        from sqlalchemy import select as sa_select
-        from app.core.db import get_worker_session_factory
        komm = get_contract_registry().get("kommunikation")
        if komm:
            factory = get_worker_session_factory()
@@ -274,8 +276,8 @@ async def gather_context(
        # Upcoming calendar events
        from app.plugins.builtins.calendar.contracts import get_contract as get_calendar_contract
        _cal = get_calendar_contract()
-        calendar_entry = _cal.calendar_entry
-        calendar_entry_link = _cal.calendar_entry_link
+        calendar_entry = _cal.CalendarEntry
+        calendar_entry_link = _cal.CalendarEntryLink

        now = datetime.now(UTC)
        event_result = await db.execute(
@@ -389,8 +391,8 @@ async def gather_context(
        # Upcoming events
        from app.plugins.builtins.calendar.contracts import get_contract as get_calendar_contract
        _cal = get_calendar_contract()
-        calendar_entry = _cal.calendar_entry
-        calendar_entry_link = _cal.calendar_entry_link
+        calendar_entry = _cal.CalendarEntry
+        calendar_entry_link = _cal.CalendarEntryLink

        now = datetime.now(UTC)
        event_result = await db.execute(
@@ -62,7 +62,10 @@ class AIUIControlPlugin(BasePlugin):
        from app.plugins.builtins.contracts import get_contract_registry
        get_contract_registry().unregister(self.manifest.name)

-        await super().on_deactivate(db, service_container, event_bus)
+        # Remove the WebSocket manager BEFORE super() so that event handlers
+        # being unsubscribed can no longer reach it (ARCH-044).
        if service_container.has("ai_ui_control_ws"):
            service_container.remove("ai_ui_control_ws")
            logger.info("AI UI Control WebSocket manager removed")
+
+        await super().on_deactivate(db, service_container, event_bus)
@@ -55,7 +55,8 @@ async def send_agent_message(

    # 2. Create a kommunikation message in a dedicated agent room
    try:
-        from app.plugins.builtins.kommunikation.contracts import CommConversation as Room, CommMessage as Message
+        from app.plugins.builtins.kommunikation.contracts import CommConversation as Room
+        from app.plugins.builtins.kommunikation.contracts import CommMessage as Message

        # Find or create the agent-to-agent room
        room_name = f"agent:{from_agent_id}:{target_agent.id}"
@@ -619,6 +619,7 @@ async def stream_agent_run(
    in real-time as the agent processes.
    """
    from fastapi.responses import StreamingResponse
+
    from app.ai.agent_stream import stream_react_loop
    from app.plugins.builtins.ai_assistant.contracts import get_tool_registry

@@ -11,6 +11,7 @@ Safety features:
 from __future__ import annotations

 import logging
+import uuid
 from datetime import UTC, datetime
 from typing import Any

@@ -37,12 +38,12 @@ async def run_agent(
    3. Infinite loop: same tool 5x consecutively (handled in ReAct loop)
    4. Budget limit: cumulative cost_usd
    """
+    from app.plugins.builtins.ai_assistant.contracts import get_tool_registry
    from app.plugins.builtins.automation.models import (
        AgentDefinition,
        AgentRun,
        AgentRunStep,
    )
-    from app.plugins.builtins.ai_assistant.contracts import get_tool_registry

    factory = get_session_factory()

@@ -110,9 +111,9 @@ async def run_agent(
        try:
            from app.plugins.builtins.contracts import get_contract
            mail_contract = get_contract("mail")
-            if mail_contract and hasattr(mail_contract, "get_recent_mails"):
+            if mail_contract and hasattr(mail_contract, "Mail"):
                from sqlalchemy import select as _select
-                from app.plugins.builtins.mail.models import Mail
+                Mail = mail_contract.Mail
                async with factory() as db:
                    mail_q = await db.execute(
                        _select(Mail)
@@ -167,7 +168,7 @@ async def run_agent(
        perm_ctx = await resolve_agent_permissions(
            db=db,
            tenant_id=agent.tenant_id,
-            user_id=agent.created_by or uuid_mod.uuid4(),
+            user_id=agent.created_by or uuid.uuid4(),
            agent_definition=agent,
        )

@@ -379,23 +380,16 @@ async def run_agent(
        komm = get_contract_registry().get("kommunikation")
        if komm:
            async with factory() as db:
-                # Find or create agent conversation room
-                from app.plugins.builtins.contracts import get_contract as _get_contract
-                _komm_contract = _get_contract("kommunikation")
-                from app.plugins.builtins.kommunikation.models import CommConversation
-                from sqlalchemy import select as sa_select
+                # Find or create agent conversation room via contract
+                # (find_locked_room_id matches create_plugin_room semantics)
                room_title = f"Agent: {agent.name}"
-                existing = await db.execute(
-                    sa_select(CommConversation).where(
-                        CommConversation.tenant_id == agent.tenant_id,
-                        CommConversation.title == room_title,
-                        CommConversation.is_locked.is_(True),
-                        CommConversation.locked_by == "automation",
-                        CommConversation.deleted_at.is_(None),
+                conv_id = await komm.find_locked_room_id(
+                    db=db,
+                    tenant_id=agent.tenant_id,
+                    plugin_name="automation",
+                    title=room_title,
                )
-                )
-                conv = existing.scalar_one_or_none()
-                if not conv:
+                if not conv_id:
                    room = await komm.create_plugin_room(
                        db=db,
                        tenant_id=agent.tenant_id,
@@ -405,8 +399,6 @@ async def run_agent(
                        participant_type="agent",
                    )
                    conv_id = uuid.UUID(room["conversation_id"])
-                else:
-                    conv_id = conv.id

                # Post result as message with action_card block
                status = result_data.get("status", "unknown")
@@ -0,0 +1,31 @@
+-- Dual-path convergence (Gate B): create the ReAct step-tracking table
+-- that Alembic migration 0121 creates on the core path, add the Phase-F
+-- columns from 0122, and apply the RLS policy from 0129/0136. Idempotent
+-- so both install paths converge to the identical schema.
+CREATE TABLE IF NOT EXISTS automation_agent_run_steps (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    tenant_id UUID NOT NULL,
+    agent_run_id UUID NOT NULL REFERENCES automation_agent_runs(id) ON DELETE CASCADE,
+    step_number INTEGER NOT NULL,
+    thought TEXT,
+    action VARCHAR(255),
+    action_input JSONB,
+    observation TEXT,
+    cost_usd FLOAT NOT NULL DEFAULT 0.0,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+CREATE INDEX IF NOT EXISTS ix_agent_run_steps_run ON automation_agent_run_steps(tenant_id, agent_run_id);
+
+ALTER TABLE automation_agent_definitions ADD COLUMN IF NOT EXISTS temperature FLOAT NOT NULL DEFAULT 0.3;
+ALTER TABLE automation_agent_definitions ADD COLUMN IF NOT EXISTS max_tokens INTEGER NOT NULL DEFAULT 1000;
+ALTER TABLE automation_agent_definitions ADD COLUMN IF NOT EXISTS max_steps INTEGER NOT NULL DEFAULT 20;
+ALTER TABLE automation_agent_definitions ADD COLUMN IF NOT EXISTS trace_mode VARCHAR(20) NOT NULL DEFAULT 'standard';
+ALTER TABLE automation_agent_definitions ADD COLUMN IF NOT EXISTS skill_ids JSONB NOT NULL DEFAULT '[]'::jsonb;
+ALTER TABLE automation_agent_definitions ADD COLUMN IF NOT EXISTS trigger_config JSONB NOT NULL DEFAULT '{}'::jsonb;
+ALTER TABLE automation_agent_definitions ADD COLUMN IF NOT EXISTS ai_use_case_metadata JSONB NOT NULL DEFAULT '{}'::jsonb;
+
+-- RLS matching migrations 0129 + 0136 (current_tenant_id variant)
+ALTER TABLE automation_agent_run_steps ENABLE ROW LEVEL SECURITY;
+DROP POLICY IF EXISTS tenant_isolation ON automation_agent_run_steps;
+CREATE POLICY tenant_isolation ON automation_agent_run_steps
+    USING (tenant_id::text = current_setting('app.current_tenant_id', true));
@@ -38,7 +38,7 @@ class AutomationPlugin(BasePlugin):
            "Define AI agents with LLM models and tools, create event/schedule/manual "
            "automations with conditions and actions, schedule cron jobs, and track execution logs."
        ),
-        dependencies=[],
+        dependencies=["mail"],
        routes=[
            PluginRouteDef(
                path="/api/v1/automation",
@@ -62,7 +62,7 @@ class AutomationPlugin(BasePlugin):
            "mail.received",
            "workflow.timeout",
        ],
-        migrations=["0001_initial.sql", "0002_agent_subtasks.sql", "0003_skill_definitions.sql"],
+        migrations=["0001_initial.sql", "0002_agent_subtasks.sql", "0003_skill_definitions.sql", "0004_run_steps_phase_f.sql"],
        permissions=[
            "automation:read",
            "automation:write",
@@ -82,6 +82,7 @@ class AutomationPlugin(BasePlugin):
                path="/workflows",
                icon="Workflow",
                order=52,
+                permission="automation:read",
            ),
            FrontendMenuItem(
                label_key="nav.importExport",
@@ -89,6 +90,7 @@ class AutomationPlugin(BasePlugin):
                path="/import-export",
                icon="ArrowUpDown",
                order=53,
+                permission="import_export:read",
            ),
            FrontendMenuItem(
                label_key="nav.dedupMerge",
@@ -96,6 +98,7 @@ class AutomationPlugin(BasePlugin):
                path="/contacts/dedup",
                icon="Copy",
                order=54,
+                permission="contacts:read",
            ),
            FrontendMenuItem(
                label_key="nav.tags",
@@ -103,6 +106,7 @@ class AutomationPlugin(BasePlugin):
                path="/tags",
                icon="Tag",
                order=55,
+                permission="tags:read",
            ),
            FrontendMenuItem(
                label_key="nav.activity",
@@ -110,6 +114,7 @@ class AutomationPlugin(BasePlugin):
                path="/activity",
                icon="Activity",
                order=56,
+                permission="contacts:read",
            ),
        ],
        page_routes=[
@@ -117,21 +122,25 @@ class AutomationPlugin(BasePlugin):
                path="/automation",
                component="@/pages/AutomationDashboard",
                order=50,
+                permission="automation:read",
            ),
            FrontendPageRoute(
                path="/agents",
                component="@/pages/AgentDashboard",
                order=51,
+                permission="agents:read",
            ),
            FrontendPageRoute(
                path="/workflows",
                component="@/pages/Workflows",
                order=52,
+                permission="automation:read",
            ),
            FrontendPageRoute(
                path="/import-export",
                component="@/pages/ImportExport",
                order=53,
+                permission="import_export:read",
            ),
        ],
        settings_pages=[
@@ -239,18 +248,25 @@ class AutomationPlugin(BasePlugin):
            logger.exception("Failed to register own cron jobs")
        # Register pre-built agents in DB (if not already present)
        try:
-            from app.plugins.builtins.automation.models import AgentDefinition
-            from app.plugins.builtins.automation.prebuilt.email_triage_agent import create_email_triage_agent
-            from app.plugins.builtins.automation.prebuilt.contact_enrichment_agent import create_contact_enrichment_agent
-            from app.plugins.builtins.automation.prebuilt.follow_up_agent import create_follow_up_agent
-            from app.plugins.builtins.automation.prebuilt.report_agent import create_report_agent
            from sqlalchemy import select as sa_select

-            # Get first tenant + admin user for seeding
-            from app.models.user import User
-            from app.models.tenant import Tenant
-            tenant_result = await db.execute(sa_select(Tenant).limit(1))
-            tenant = tenant_result.scalar_one_or_none()
+            # Get system tenant + admin user for seeding (ARCH-043:
+            # deterministic slug lookup instead of arbitrary first row)
+            from app.core.db import get_system_tenant
+            from app.models.user import User, UserTenant
+            from app.plugins.builtins.automation.models import AgentDefinition
+            from app.plugins.builtins.automation.prebuilt.contact_enrichment_agent import (
+                create_contact_enrichment_agent,
+            )
+            from app.plugins.builtins.automation.prebuilt.email_triage_agent import (
+                create_email_triage_agent,
+            )
+            from app.plugins.builtins.automation.prebuilt.follow_up_agent import (
+                create_follow_up_agent,
+            )
+            from app.plugins.builtins.automation.prebuilt.report_agent import create_report_agent
+
+            tenant = await get_system_tenant(db)
            if tenant:
                user_result = await db.execute(
                    sa_select(User)
@@ -288,15 +304,14 @@ class AutomationPlugin(BasePlugin):
    def _register_workflow_agent_tools(self) -> None:
        """Register I-AW agent tools for starting and inspecting workflows."""
        import uuid
-        from typing import Any

        from app.ai.tool_registry import get_tool_registry
        registry = get_tool_registry()

        async def _start_workflow_handler(arguments: dict[str, Any], context: dict[str, Any]) -> dict[str, Any]:
            """Start a workflow by ID."""
-            from app.services.workflow_service import create_instance
            from app.core.db import get_worker_session_factory
+            from app.services.workflow_service import create_instance
            workflow_id = arguments.get("workflow_id", "")
            tenant_id = context.get("tenant_id")
            user_id = context.get("user_id")
@@ -332,8 +347,9 @@ class AutomationPlugin(BasePlugin):
        async def _check_workflow_status_handler(arguments: dict[str, Any], context: dict[str, Any]) -> dict[str, Any]:
            """Check the status of a workflow instance."""
            from sqlalchemy import select
-            from app.models.workflow import WorkflowInstance
+
            from app.core.db import get_worker_session_factory
+            from app.models.workflow import WorkflowInstance
            instance_id = arguments.get("instance_id", "")
            tenant_id = context.get("tenant_id")
            if not instance_id or not tenant_id:
@@ -418,16 +434,16 @@ class AutomationPlugin(BasePlugin):
        from another plugin's manifest. Uses plugin name prefixing for conflict resolution."""
        from sqlalchemy import select

-        # Get default tenant_id from the first tenant in the DB
-        from app.models.tenant import Tenant
+        # Get system tenant for contributions (ARCH-043: deterministic slug
+        # lookup instead of arbitrary first row)
+        from app.core.db import get_system_tenant
        from app.plugins.builtins.automation.models import AutomationCronJob
        from app.plugins.builtins.automation.services import (
            AgentService,
            AutomationService,
            CronJobService,
        )
-        tenant_result = await db.execute(select(Tenant).limit(1))
-        tenant = tenant_result.scalar_one_or_none()
+        tenant = await get_system_tenant(db)
        default_tenant_id = tenant.id if tenant else None
        if default_tenant_id is None:
            logger.warning("No tenant found — skipping plugin contributions registration")
@@ -3,7 +3,9 @@
 Enriches contact data by searching for related information.
 """
 from __future__ import annotations
+
 import uuid
+
 from app.plugins.builtins.automation.models import AgentDefinition

 CONTACT_ENRICHMENT_SYSTEM_PROMPT = """You are a Contact Enrichment Agent for a CRM system.
@@ -3,7 +3,9 @@
 Sorts and prioritizes incoming emails automatically.
 """
 from __future__ import annotations
+
 import uuid
+
 from app.plugins.builtins.automation.models import AgentDefinition

 EMAIL_TRIAGE_SYSTEM_PROMPT = """You are an E-Mail Triage Agent for a CRM system.
@@ -3,7 +3,9 @@
 Reminds about and creates follow-up tasks for contacts.
 """
 from __future__ import annotations
+
 import uuid
+
 from app.plugins.builtins.automation.models import AgentDefinition

 FOLLOW_UP_SYSTEM_PROMPT = """You are a Follow-up Agent for a CRM system.
@@ -3,7 +3,9 @@
 Generates reports from CRM data using search and API tools.
 """
 from __future__ import annotations
+
 import uuid
+
 from app.plugins.builtins.automation.models import AgentDefinition

 REPORT_SYSTEM_PROMPT = """You are a Report Agent for a CRM system.
@@ -1,60 +1,132 @@
 """Tests for the Automation & Agents plugin.

-Uses pytest with async fixtures. Tests use SQLite in-memory database
-since PostgreSQL may not be available in the dev container.
+Uses pytest with async fixtures against an ephemeral PostgreSQL database
+(SQLITE-001 fix) — matches the project convention and exercises the real
+PGUUID/JSONB column types.
 """

 from __future__ import annotations

+# Register ALL plugin models so create_all can resolve cross-plugin FKs
+# (e.g. entity_attachments.dms_file_id -> files) — same pattern as
+# scripts/sync_plugin_schema.py.
+import importlib
+import os
+import pkgutil
 import uuid
 from collections.abc import AsyncGenerator
 from datetime import UTC, datetime, timedelta

 import pytest
 import pytest_asyncio
+from sqlalchemy import text
 from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine

+import app.models  # noqa: F401  — registers core models
+import app.models.outbox  # noqa: F401  — event_outbox is NOT re-exported by app.models
+import app.plugins.builtins as _builtins_pkg
 from app.core.db import Base
-from app.plugins.builtins.automation.models import (
+
+for _importer, _modname, _ispkg in pkgutil.iter_modules(_builtins_pkg.__path__):
+    if not _ispkg:
+        continue
+    try:
+        importlib.import_module(f"app.plugins.builtins.{_modname}.models")
+    except ImportError:
+        pass  # plugin without models module
+    except Exception:  # pragma: no cover - defensive
+        pass
+
+from app.plugins.builtins.automation.models import (  # noqa: E402 — after dynamic plugin-model discovery
    AgentRun,
    AutomationRun,
 )
-from app.plugins.builtins.automation.services import (
+from app.plugins.builtins.automation.services import (  # noqa: E402 — after dynamic plugin-model discovery
    AgentService,
    AutomationService,
    CronJobService,
 )

+
+def _ephemeral_db_url() -> str:
+    """Derive an ephemeral test DB URL from DATABASE_URL/.env.test."""
+    base_url = os.environ.get(
+        "DATABASE_URL",
+        "postgresql+asyncpg://leocrm_test:test123@localhost:5432/leocrm_test",
+    )
+    return f"{base_url.rsplit('/', 1)[0]}/automation_test_{uuid.uuid4().hex[:8]}"
+
+
 # ─── Fixtures ───


@pytest_asyncio.fixture
 async def db() -> AsyncGenerator[AsyncSession, None]:
-    """Create an in-memory SQLite database for testing."""
-    engine = create_async_engine(
-        "sqlite+aiosqlite:///:memory:",
-        echo=False,
-    )
+    """Create an ephemeral PostgreSQL database for this test run."""
+    db_url = _ephemeral_db_url()
+    admin_url = db_url.rsplit("/", 1)[0] + "/postgres"
+
+    from sqlalchemy.ext.asyncio import create_async_engine as _cae
+
+    admin_engine = _cae(admin_url, isolation_level="AUTOCOMMIT")
+    async with admin_engine.connect() as conn:
+        await conn.execute(text(f'CREATE DATABASE "{db_url.rsplit("/", 1)[1]}"'))
+    await admin_engine.dispose()
+
+    # Plugin models use the pgvector Vector type — enable the extension in
+    # the fresh database before create_all runs (must connect to the target
+    # DB itself; CREATE EXTENSION has no ON DATABASE clause).
+    ext_engine = _cae(db_url, isolation_level="AUTOCOMMIT")
+    async with ext_engine.connect() as conn:
+        await conn.execute(text("CREATE EXTENSION IF NOT EXISTS vector"))
+    await ext_engine.dispose()
+
+    engine = create_async_engine(db_url, echo=False)

    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)

    async_session = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)

+    try:
        async with async_session() as session:
            yield session
-
+    finally:
        await engine.dispose()
+        admin_engine2 = _cae(admin_url, isolation_level="AUTOCOMMIT")
+        async with admin_engine2.connect() as conn:
+            await conn.execute(text(f'DROP DATABASE IF EXISTS "{db_url.rsplit("/", 1)[1]}"'))
+        await admin_engine2.dispose()


-@pytest.fixture
-def tenant_id() -> uuid.UUID:
-    return uuid.uuid4()
+@pytest_asyncio.fixture
+async def tenant_id(db: AsyncSession) -> uuid.UUID:
+    """Create a real tenant row — PostgreSQL enforces FKs, unlike SQLite."""
+    from app.models.tenant import Tenant
+
+    tid = uuid.uuid4()
+    db.add(Tenant(id=tid, name="Test Org", slug=f"test-{tid.hex[:8]}"))
+    await db.commit()
+    return tid


-@pytest.fixture
-def user_id() -> uuid.UUID:
-    return uuid.uuid4()
+@pytest_asyncio.fixture
+async def user_id(db: AsyncSession, tenant_id: uuid.UUID) -> uuid.UUID:
+    """Create a real user row belonging to the test tenant."""
+    from app.models.user import User
+
+    uid = uuid.uuid4()
+    db.add(
+        User(
+            id=uid,
+            email=f"test-{uid.hex[:8]}@example.com",
+            name="Test User",
+            password_hash="not-a-real-hash",
+            is_active=True,
+        )
+    )
+    await db.commit()
+    return uid


 # ─── AgentService Tests ───
@@ -425,11 +497,17 @@ class TestDryRunMode:
        assert automation.dry_run is True

    @pytest.mark.asyncio
-    async def test_dry_run_flag_in_run(self, db: AsyncSession, tenant_id: uuid.UUID):
+    async def test_dry_run_flag_in_run(self, db: AsyncSession, tenant_id: uuid.UUID, user_id: uuid.UUID):
        """Test that dry_run flag is stored in AutomationRun."""
+        # PostgreSQL enforces the FK to automations — create a real one first
+        data = {"name": "dry-run-flag", "description": "", "trigger_type": "manual",
+                "trigger_config": {}, "conditions": [], "actions": [],
+                "is_active": True, "dry_run": True}
+        automation = await AutomationService.create(db, tenant_id, data, user_id=user_id)
+
        run = AutomationRun(
            tenant_id=tenant_id,
-            automation_id=uuid.uuid4(),
+            automation_id=automation.id,
            status="dry_run",
            started_at=datetime.now(UTC),
            dry_run=True,
@@ -475,7 +553,9 @@ class TestRateLimiting:
        )
        recent_runs = result.scalar() or 0
        assert recent_runs == 2
-        assert recent_runs < agent.max_executions_per_hour  # 2 < 2 is False, so limit would be hit
+        # With max_executions_per_hour=2 and 2 runs in the window, the limit
+        # is reached — the next execution must be blocked.
+        assert recent_runs >= agent.max_executions_per_hour


 # ─── Budget Limit Tests ───
@@ -512,7 +592,8 @@ class TestBudgetLimit:
            .where(AgentRun.agent_id == agent.id)
        )
        total_cost = float(cost_result.scalar() or 0.0)
-        assert total_cost == 0.6
+        # FLOAT column accumulates binary rounding (0.6000000000000001)
+        assert total_cost == pytest.approx(0.6)
        assert total_cost >= agent.budget_limit_usd  # 0.6 >= 0.5, budget exceeded


@@ -6,6 +6,7 @@ import uuid
 from datetime import datetime
 from typing import Any

+from pgvector.sqlalchemy import Vector
 from sqlalchemy import (
    Boolean,
    DateTime,
@@ -13,14 +14,12 @@ from sqlalchemy import (
    Index,
    String,
 )
-from sqlalchemy.dialects.postgresql import JSONB
+from sqlalchemy.dialects.postgresql import JSONB, TSVECTOR
 from sqlalchemy.dialects.postgresql import UUID as PGUUID
 from sqlalchemy.orm import Mapped, mapped_column

 from app.core.db import Base, TenantMixin
 from app.models.owned_mixin import OwnedMixin
-from sqlalchemy.dialects.postgresql import TSVECTOR
-from pgvector.sqlalchemy import Vector


 class Calendar(Base, TenantMixin, OwnedMixin):
@@ -4,7 +4,7 @@ from __future__ import annotations

 from app.plugins.base import BasePlugin
 from app.plugins.manifest import (
-    FrontendDetailTab,
+    FrontendDashboardWidget,
    FrontendMenuItem,
    FrontendPageRoute,
    PluginManifest,
@@ -40,6 +40,18 @@ class CalendarPlugin(BasePlugin):
        ],
        events=[],
        migrations=["0001_initial.sql", "0002_add_deleted_at.sql"],
+        dashboard_widgets=[
+            FrontendDashboardWidget(
+                id="calendar_upcoming",
+                label_key="dashboard.calendarUpcoming",
+                label="Upcoming Appointments",
+                component="@/components/dashboard/CalendarUpcomingWidget",
+                icon="Calendar",
+                order=30,
+                col_span=1,
+                permission="calendar:read",
+            ),
+        ],
        permissions=[
            "calendar:read",
            "calendar:write",
@@ -48,14 +60,14 @@ class CalendarPlugin(BasePlugin):
            "calendar:admin",
        ],
        menu_items=[
-            FrontendMenuItem(label_key='nav.calendar', label='Kalender', path='/calendar', icon='Calendar', order=20),
+            FrontendMenuItem(label_key='nav.calendar', label='Kalender', path='/calendar', icon='Calendar', order=20, permission='calendar:read'),
        ],
        page_routes=[
-            FrontendPageRoute(path='/calendar', component='@/pages/Calendar', protected=True),
-        ],
-        detail_tabs=[
-            FrontendDetailTab(entity_type='contact', label_key='tabs.calendar', label='Calendar', component='@/components/contact/ContactCalendarTab', icon='Calendar', order=30, permission='calendar:read'),
+            FrontendPageRoute(path='/calendar', component='@/pages/Calendar', protected=True, permission='calendar:read'),
        ],
+        # BUG (ghost component): ContactCalendarTab does not exist in the
+        # frontend — tab removed until implemented (Block I-D).
+        detail_tabs=[],
        author="LeoCRM Team",
        min_app_version="1.0.0",
        hooks=["calendar.before_appointment", "calendar.after_appointment"],
@@ -21,6 +21,7 @@ from fastapi.responses import StreamingResponse
 from sqlalchemy import select, update
 from sqlalchemy.ext.asyncio import AsyncSession

+from app.core.audit import log_audit
 from app.core.db import get_db
 from app.deps import get_current_user, require_admin, require_permission
 from app.plugins.builtins.calendar.ics_utils import (
@@ -1023,5 +1024,3 @@ async def book_resource(
        "start_at": booking.start_at.isoformat(),
        "end_at": booking.end_at.isoformat(),
    }
-
-from app.core.audit import log_audit
@@ -0,0 +1,62 @@
+"""Public contract for the contacts plugin.
+
+Exposes the symbols that other core modules and plugins need without
+importing from internal modules directly (Block C7: dashboard counts).
+"""
+
+from __future__ import annotations
+
+from typing import Any
+
+from sqlalchemy import func, select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.visibility import apply_visibility_filter
+from app.models.contact import Contact
+from app.plugins.builtins.contracts import get_contract_registry
+
+
+class ContactsContract:
+    """Public API surface for the contacts plugin."""
+
+    contract_name = "contacts"
+
+    @staticmethod
+    async def get_counts(
+        db: AsyncSession,
+        tenant_id: Any,
+        user_id: Any,
+        is_system_admin: bool = False,
+    ) -> dict[str, int]:
+        """Return visibility-filtered contact/company/person counts."""
+        queries = []
+        for type_filter in (None, "company", "person"):
+            query = select(func.count(Contact.id)).where(
+                Contact.tenant_id == tenant_id,
+                Contact.deleted_at.is_(None),
+            )
+            if type_filter is not None:
+                query = query.where(Contact.type == type_filter)
+            query = await apply_visibility_filter(
+                db, query, "contact", Contact, user_id, tenant_id, is_system_admin
+            )
+            queries.append(query)
+
+        results = [((await db.execute(q)).scalar() or 0) for q in queries]
+        return {
+            "contacts": results[0],
+            "companies": results[1],
+            "persons": results[2],
+            "total": results[0],
+        }
+
+    @classmethod
+    def get_function(cls, name: str):
+        """Return a callable exposed by this contract, or None if absent."""
+        return getattr(cls, name, None)
+
+
+# ─── self-registration ───
+
+_contract = ContactsContract()
+get_contract_registry().register("contacts", _contract)
@@ -9,27 +9,67 @@ from __future__ import annotations
 import logging

 from app.plugins.base import BasePlugin
-from app.plugins.manifest import PluginManifest
+from app.plugins.manifest import (
+    FrontendDashboardWidget,
+    PluginManifest,
+    PluginRouteDef,
+)

 logger = logging.getLogger(__name__)


 class ContactsPlugin(BasePlugin):
-    """Contacts plugin — manages Contact entity lifecycle (models, permissions, restore, history).
+    """Contacts plugin — owns the full Contact domain (Block B1).

-    Routes remain in app/routes/contacts.py as core routes, but entity lifecycle
-    (permissions, entity models, restore, history) is managed through on_activate/on_deactivate.
+    Routes (contacts, companies, contact folders, folder permissions) live in
+    this plugin and are mounted via manifest.routes with
+    require_active_plugin("contacts") protection. Entity lifecycle
+    (permissions, entity models, restore, history) is managed through
+    on_activate/on_deactivate like every other business plugin.
    """

    manifest = PluginManifest(
        name="contacts",
-        version="1.0.0",
+        version="1.1.0",
        display_name="Contacts",
        description="Core CRM contacts — persons and companies.",
        dependencies=[],
-        routes=[],  # Routes are registered as core routes in main.py
+        routes=[
+            PluginRouteDef(
+                path="/api/v1/contacts",
+                module="app.plugins.builtins.contacts.routes",
+                router_attr="router",
+            ),
+            PluginRouteDef(
+                path="/api/v1/companies",
+                module="app.plugins.builtins.contacts.company_routes",
+                router_attr="router",
+            ),
+            PluginRouteDef(
+                path="/api/v1/contact-folders",
+                module="app.plugins.builtins.contacts.folder_routes",
+                router_attr="router",
+            ),
+            PluginRouteDef(
+                path="/api/v1/contact-folders",
+                module="app.plugins.builtins.contacts.folder_permission_routes",
+                router_attr="router",
+            ),
+        ],
        events=[],
        migrations=[],
+        dashboard_widgets=[
+            FrontendDashboardWidget(
+                id="recent_contacts",
+                label_key="dashboard.recentContacts",
+                label="Recent Contacts",
+                component="@/components/dashboard/RecentContactsWidget",
+                icon="Users",
+                order=10,
+                col_span=2,
+                permission="contacts:read",
+            ),
+        ],
        permissions=[
            "contacts:read",
            "contacts:write",
@@ -59,20 +59,31 @@ class ContractRegistry:
            cls._instance = super().__new__(cls)
            cls._instance._contracts: dict[str, Any] = {}
            cls._instance._loaded: set[str] = set()
+            cls._instance._unregistered: set[str] = set()
        return cls._instance

    # ─── registration ───

    def register(self, plugin_name: str, contract: Any) -> None:
-        """Register or replace a contract for a plugin."""
+        """Register or replace a contract for a plugin.
+
+        Clears the unregistered marker so a later deactivation can be
+        distinguished from a fresh lazy-load again (ARCH-014).
+        """
+        self._unregistered.discard(plugin_name)
        self._contracts[plugin_name] = contract
        self._loaded.add(plugin_name)
        logger.debug("Contract registered for plugin '%s'", plugin_name)

    def unregister(self, plugin_name: str) -> None:
-        """Remove a contract (e.g. when the plugin is deactivated)."""
+        """Remove a contract (e.g. when the plugin is deactivated).
+
+        Marks the plugin as explicitly unregistered so later ``get_contract``
+        calls cannot resurrect the contract via lazy-loading (ARCH-014).
+        """
        self._contracts.pop(plugin_name, None)
        self._loaded.discard(plugin_name)
+        self._unregistered.add(plugin_name)

    # ─── lookup ───

@@ -85,6 +96,11 @@ class ContractRegistry:
        if plugin_name in self._contracts:
            return self._contracts[plugin_name]

+        # Explicitly unregistered (deactivated): never resurrect via
+        # lazy-loading (ARCH-014) — the deactivated contract must stay gone.
+        if plugin_name in self._unregistered:
+            return None
+
        if plugin_name not in self._loaded:
            self._try_lazy_load(plugin_name)

@@ -0,0 +1,111 @@
+"""DMS gemeinsame Helper & Konstanten — BUG-018 God-Object-Split."""
+
+from __future__ import annotations
+
+import os
+import uuid
+
+from fastapi import HTTPException
+
+OFFICE_EXTENSIONS = {
+    ".docx": "docx",
+    ".xlsx": "xlsx",
+    ".pptx": "pptx",
+}
+
+# Max file size: 100 MB
+MAX_FILE_SIZE = 100 * 1024 * 1024
+
+
+def _parse_uuid(val: str, field: str) -> uuid.UUID:
+    try:
+        return uuid.UUID(val)
+    except (ValueError, TypeError):
+        raise HTTPException(
+            400, detail={"detail": f"Invalid {field}", "code": "invalid_id"}
+        ) from None
+
+
+def _file_storage_path(tenant_id: uuid.UUID, file_id: uuid.UUID) -> str:
+    """Build relative storage path for a file (relative to storage base)."""
+    return f"{tenant_id}/{file_id}"
+
+
+def _get_file_extension(filename: str) -> str:
+    """Extract lowercase extension including dot."""
+    return os.path.splitext(filename)[1].lower()
+
+
+
+def _sanitize_filename(filename: str) -> str:
+    """Sanitize a filename for safe use in Content-Disposition headers."""
+    import re
+    # Extract basename only (strip any path components)
+    safe = os.path.basename(filename.replace('\\', '/'))
+    # Remove dangerous characters (keep alnum, dot, dash, underscore, space, unicode)
+    safe = re.sub(r'[^a-zA-Z0-9.\-_\u00c0-\u017f\u4e00-\u9fff ]', '_', safe)
+    # Collapse consecutive dots (path traversal prevention)
+    safe = re.sub(r'\.{2,}', '_', safe)
+    # Collapse multiple spaces
+    safe = re.sub(r' {2,}', ' ', safe)
+    # Strip leading dots and whitespace
+    safe = safe.lstrip('.').strip()
+    # Limit length
+    if len(safe) > 200:
+        name, ext = safe.rsplit('.', 1) if '.' in safe[:200] else (safe[:200], '')
+        safe = name[:200] + ('.' + ext if ext else '')
+    return safe or 'file'
+
+# Blocked file extensions for security
+BLOCKED_EXTENSIONS = {
+    ".exe", ".bat", ".cmd", ".sh", ".jar", ".com", ".scr", ".msi",
+    ".dll", ".vbs", ".ps1", ".app", ".bin", ".reg", ".inf",
+    ".php", ".py", ".pl", ".asp", ".aspx", ".jsp", ".svg", ".htaccess",
+    ".phtml", ".pht", ".cgi", ".cfm", ".erb",
+}
+
+# Allowed MIME types for upload validation
+ALLOWED_MIME_PREFIXES = {
+    "application/pdf",
+    "application/msword",
+    "application/vnd.openxmlformats-officedocument",
+    "application/vnd.oasis.opendocument",
+    "application/vnd.ms-excel",
+    "application/vnd.ms-powerpoint",
+    "application/zip",
+    "application/gzip",
+    "application/x-tar",
+    "application/json",
+    "application/xml",
+    "application/rtf",
+    "application/x-7z-compressed",
+    "application/x-rar-compressed",
+    "text/plain",
+    "text/csv",
+    "text/html",
+    "text/markdown",
+    "image/png",
+    "image/jpeg",
+    "image/gif",
+    "image/webp",
+    "image/bmp",
+    "image/tiff",
+    "image/x-icon",
+    "audio/",
+    "video/",
+    "application/octet-stream",
+}
+
+
+def _is_blocked_filetype(filename: str) -> bool:
+    """Check if a file has a blocked (dangerous) extension."""
+    ext = os.path.splitext(filename)[1].lower()
+    return ext in BLOCKED_EXTENSIONS
+
+
+chunk_size = 1024 * 1024  # 1MB chunks for streaming uploads
+
+# ─── Folders ───
+
+# Public stream-chunk constant (original contract name from tests/test_p1_6_dms_streaming.py)
+CHUNK_SIZE = chunk_size
@@ -0,0 +1,383 @@
+"""DMS Folder-CRUD Routen — extrahiert aus routes.py (BUG-018 God-Object-Split)."""
+
+from __future__ import annotations
+
+import uuid
+
+from fastapi import (
+    APIRouter,
+    Depends,
+    HTTPException,
+    Response,
+    status,
+)
+from sqlalchemy import select, update
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.db import get_db
+from app.core.visibility import apply_visibility_filter, check_single_entity_access
+from app.deps import get_current_user, require_permission
+from app.plugins.builtins.dms.common import (
+    _parse_uuid,
+)
+from app.plugins.builtins.dms.models import File as DmsFile
+from app.plugins.builtins.dms.models import Folder
+from app.plugins.builtins.dms.schemas import FolderCreate, FolderUpdate
+from app.plugins.builtins.permissions.contracts import get_contract as get_perms_contract
+
+_perms_contract = get_perms_contract()
+Permission = _perms_contract.Permission
+
+router = APIRouter(tags=["dms"])
+
+@router.get("/folders", dependencies=[Depends(require_permission("dms:read"))])
+async def list_folders(
+    parent_id: str | None = None,
+    db: AsyncSession = Depends(get_db),
+    current_user: dict = Depends(get_current_user),
+):
+    """AC1: GET /api/v1/dms/folders → 200 + folder tree (recursive)."""
+    tenant_id = uuid.UUID(current_user["tenant_id"])
+
+    # Fetch all non-deleted folders for tenant with visibility filter
+    user_id = uuid.UUID(current_user["user_id"])
+    is_system_admin = current_user.get("role") == "admin"
+    query = select(Folder).where(
+        Folder.tenant_id == tenant_id,
+        Folder.deleted_at.is_(None),
+    )
+    query = await apply_visibility_filter(
+        db, query, "dms_folder", Folder, user_id, tenant_id, is_system_admin
+    )
+    result = await db.execute(query)
+    all_folders = result.scalars().all()
+
+    # Build lookup map
+    folder_map: dict[uuid.UUID, dict] = {}
+    for f in all_folders:
+        folder_map[f.id] = {
+            "id": str(f.id),
+            "name": f.name,
+            "parent_id": str(f.parent_id) if f.parent_id else None,
+            "created_by": str(f.created_by),
+            "deleted_at": None,
+            "path": "",
+            "children": [],
+        }
+
+    # Build path for each folder
+    def _build_path(folder_id: uuid.UUID) -> str:
+        if folder_id not in folder_map:
+            return ""
+        f = folder_map[folder_id]
+        if f["parent_id"] and uuid.UUID(f["parent_id"]) in folder_map:
+            parent_path = _build_path(uuid.UUID(f["parent_id"]))
+            return f"{parent_path}/{f['name']}"
+        return f["name"]
+
+    for fid in folder_map:
+        folder_map[fid]["path"] = _build_path(fid)
+
+    # Build tree
+    root_nodes: list[dict] = []
+    target_parent: uuid.UUID | None = None
+    if parent_id is not None:
+        target_parent = _parse_uuid(parent_id, "parent_id")
+
+    for f in all_folders:
+        node = folder_map[f.id]
+        if f.parent_id is not None and f.parent_id in folder_map:
+            folder_map[f.parent_id]["children"].append(node)
+        elif f.parent_id is None:
+            root_nodes.append(node)
+
+    if target_parent is not None:
+        # Return children of specified parent
+        parent_node = folder_map.get(target_parent)
+        if parent_node is None:
+            raise HTTPException(
+                404, detail={"detail": "Parent folder not found", "code": "not_found"}
+            )
+        return parent_node["children"]
+
+    return root_nodes
+
+
+@router.post("/folders", status_code=status.HTTP_201_CREATED, dependencies=[Depends(require_permission("dms:write"))])
+async def create_folder(
+    body: FolderCreate,
+    db: AsyncSession = Depends(get_db),
+    current_user: dict = Depends(get_current_user),
+):
+    """AC2: POST /api/v1/dms/folders → 201, folder created with path."""
+    tenant_id = uuid.UUID(current_user["tenant_id"])
+    user_id = uuid.UUID(current_user["user_id"])
+    parent_id = _parse_uuid(body.parent_id, "parent_id") if body.parent_id else None
+
+    # Validate parent exists if specified
+    if parent_id is not None:
+        parent_result = await db.execute(
+            select(Folder).where(
+                Folder.id == parent_id,
+                Folder.tenant_id == tenant_id,
+                Folder.deleted_at.is_(None),
+            )
+        )
+        if parent_result.scalar_one_or_none() is None:
+            raise HTTPException(
+                404, detail={"detail": "Parent folder not found", "code": "not_found"}
+            )
+
+    # Check name uniqueness within same parent (non-deleted)
+    existing = await db.execute(
+        select(Folder).where(
+            Folder.tenant_id == tenant_id,
+            Folder.name == body.name,
+            Folder.parent_id == parent_id if parent_id else Folder.parent_id.is_(None),
+            Folder.deleted_at.is_(None),
+        )
+    )
+    if existing.scalar_one_or_none() is not None:
+        raise HTTPException(
+            409, detail={"detail": "Folder name already exists", "code": "duplicate"}
+        )
+
+    # Lifecycle hook: dms.folder.before_create
+    from app.core.hooks import do_action
+    await do_action("dms.folder.before_create", body, db=db, tenant_id=tenant_id, user_id=user_id)
+
+    folder = Folder(
+        tenant_id=tenant_id,
+        name=body.name,
+        parent_id=parent_id,
+        created_by=user_id,
+    )
+    db.add(folder)
+    await db.flush()
+
+    # Lifecycle hook: dms.folder.after_create
+    await do_action("dms.folder.after_create", {'id': str(folder.id), 'name': folder.name, 'parent_id': str(folder.parent_id) if folder.parent_id else None}, db=db, tenant_id=tenant_id, user_id=user_id)
+
+    # Build path
+    path = body.name
+    if parent_id is not None:
+        parent_path_result = await db.execute(select(Folder).where(Folder.id == parent_id))
+        parent_folder = parent_path_result.scalar_one_or_none()
+        if parent_folder:
+            # Recursively build path
+            path_parts = [body.name]
+            current = parent_folder
+            while current is not None:
+                path_parts.insert(0, current.name)
+                if current.parent_id is not None:
+                    cur_result = await db.execute(
+                        select(Folder).where(Folder.id == current.parent_id)
+                    )
+                    current = cur_result.scalar_one_or_none()
+                else:
+                    current = None
+            path = "/".join(path_parts)
+
+    return {
+        "id": str(folder.id),
+        "name": folder.name,
+        "parent_id": str(folder.parent_id) if folder.parent_id else None,
+        "created_by": str(folder.created_by),
+        "deleted_at": None,
+        "path": path,
+        "children": [],
+    }
+
+
+@router.patch("/folders/{folder_id}", dependencies=[Depends(require_permission("dms:write"))])
+async def update_folder(
+    folder_id: str,
+    body: FolderUpdate,
+    db: AsyncSession = Depends(get_db),
+    current_user: dict = Depends(get_current_user),
+):
+    """AC3: PATCH /api/v1/dms/folders/{id} → 200, rename/move."""
+    tenant_id = uuid.UUID(current_user["tenant_id"])
+    user_id = uuid.UUID(current_user["user_id"])
+    is_system_admin = current_user.get("role") == "admin"
+    fid = _parse_uuid(folder_id, "folder_id")
+
+    result = await db.execute(
+        select(Folder).where(
+            Folder.id == fid,
+            Folder.tenant_id == tenant_id,
+            Folder.deleted_at.is_(None),
+        )
+    )
+    folder = result.scalar_one_or_none()
+    if folder is None:
+        raise HTTPException(404, detail={"detail": "Folder not found", "code": "not_found"})
+
+    if not await check_single_entity_access(db, "dms_folder", fid, user_id, tenant_id, "write", is_system_admin):
+        raise HTTPException(403, detail={"detail": "Access denied", "code": "forbidden"})
+
+    data = body.model_dump(exclude_unset=True)
+
+    if "name" in data and data["name"] is not None:
+        # Check uniqueness if name is changing
+        new_parent_id = folder.parent_id
+        if "parent_id" in data and data["parent_id"] is not None:
+            new_parent_id = _parse_uuid(data["parent_id"], "parent_id")
+
+        dup = await db.execute(
+            select(Folder).where(
+                Folder.tenant_id == tenant_id,
+                Folder.name == data["name"],
+                Folder.id != fid,
+                Folder.parent_id == new_parent_id if new_parent_id else Folder.parent_id.is_(None),
+                Folder.deleted_at.is_(None),
+            )
+        )
+        if dup.scalar_one_or_none() is not None:
+            raise HTTPException(
+                409, detail={"detail": "Folder name already exists", "code": "duplicate"}
+            )
+        folder.name = data["name"]
+
+    if "parent_id" in data:
+        new_parent = _parse_uuid(data["parent_id"], "parent_id") if data["parent_id"] else None
+        if new_parent is not None:
+            # Validate parent exists and not creating a cycle
+            if new_parent == fid:
+                raise HTTPException(
+                    400, detail={"detail": "Cannot move folder into itself", "code": "invalid_move"}
+                )
+
+            parent_result = await db.execute(
+                select(Folder).where(
+                    Folder.id == new_parent,
+                    Folder.tenant_id == tenant_id,
+                    Folder.deleted_at.is_(None),
+                )
+            )
+            if parent_result.scalar_one_or_none() is None:
+                raise HTTPException(
+                    404, detail={"detail": "Parent folder not found", "code": "not_found"}
+                )
+
+            # Check for cycle: ensure new_parent is not a descendant of folder
+            async def _is_descendant(ancestor_id: uuid.UUID, descendant_id: uuid.UUID) -> bool:
+                cur_result = await db.execute(select(Folder).where(Folder.id == descendant_id))
+                cur = cur_result.scalar_one_or_none()
+                while cur is not None and cur.parent_id is not None:
+                    if cur.parent_id == ancestor_id:
+                        return True
+                    p_result = await db.execute(select(Folder).where(Folder.id == cur.parent_id))
+                    cur = p_result.scalar_one_or_none()
+                return False
+
+            if await _is_descendant(fid, new_parent):
+                raise HTTPException(
+                    400,
+                    detail={
+                        "detail": "Cannot move folder into its own descendant",
+                        "code": "invalid_move",
+                    },
+                )
+
+        folder.parent_id = new_parent
+
+    await db.flush()
+
+    # Build path
+    path_parts = [folder.name]
+    current_id = folder.parent_id
+    while current_id is not None:
+        cur_result = await db.execute(select(Folder).where(Folder.id == current_id))
+        cur = cur_result.scalar_one_or_none()
+        if cur is None:
+            break
+        path_parts.insert(0, cur.name)
+        current_id = cur.parent_id
+    path = "/".join(path_parts)
+
+    return {
+        "id": str(folder.id),
+        "name": folder.name,
+        "parent_id": str(folder.parent_id) if folder.parent_id else None,
+        "created_by": str(folder.created_by),
+        "deleted_at": None,
+        "path": path,
+        "children": [],
+    }
+
+
+@router.delete("/folders/{folder_id}", status_code=status.HTTP_204_NO_CONTENT, dependencies=[Depends(require_permission("dms:delete"))])
+async def delete_folder(
+    folder_id: str,
+    db: AsyncSession = Depends(get_db),
+    current_user: dict = Depends(get_current_user),
+):
+    """AC4: DELETE /api/v1/dms/folders/{id} → 204, soft-delete with cascade."""
+    tenant_id = uuid.UUID(current_user["tenant_id"])
+    user_id = uuid.UUID(current_user["user_id"])
+    is_system_admin = current_user.get("role") == "admin"
+    fid = _parse_uuid(folder_id, "folder_id")
+
+    result = await db.execute(
+        select(Folder).where(
+            Folder.id == fid,
+            Folder.tenant_id == tenant_id,
+            Folder.deleted_at.is_(None),
+        )
+    )
+    folder = result.scalar_one_or_none()
+    if folder is None:
+        raise HTTPException(404, detail={"detail": "Folder not found", "code": "not_found"})
+
+    if not await check_single_entity_access(db, "dms_folder", fid, user_id, tenant_id, "delete", is_system_admin):
+        raise HTTPException(403, detail={"detail": "Access denied", "code": "forbidden"})
+
+    # Lifecycle hook: dms.folder.before_delete
+    from app.core.hooks import do_action
+    await do_action("dms.folder.before_delete", db=db, tenant_id=tenant_id, user_id=user_id, folder_id=str(fid))
+
+    from datetime import UTC, datetime
+
+    now = datetime.now(UTC)
+
+    # Recursively collect all descendant folder IDs
+    all_folder_ids: list[uuid.UUID] = [fid]
+    queue: list[uuid.UUID] = [fid]
+    while queue:
+        current_id = queue.pop(0)
+        children_result = await db.execute(
+            select(Folder).where(
+                Folder.parent_id == current_id,
+                Folder.tenant_id == tenant_id,
+                Folder.deleted_at.is_(None),
+            )
+        )
+        for child in children_result.scalars().all():
+            all_folder_ids.append(child.id)
+            queue.append(child.id)
+
+    # Soft-delete all folders
+    await db.execute(update(Folder).where(Folder.id.in_(all_folder_ids)).values(deleted_at=now))
+
+    # Soft-delete all files in those folders
+    await db.execute(
+        update(DmsFile)
+        .where(
+            DmsFile.tenant_id == tenant_id,
+            DmsFile.folder_id.in_(all_folder_ids),
+            DmsFile.deleted_at.is_(None),
+        )
+        .values(deleted_at=now)
+    )
+
+    await db.flush()
+
+    # Lifecycle hook: dms.folder.after_delete
+    from app.core.hooks import do_action
+    await do_action("dms.folder.after_delete", db=db, tenant_id=tenant_id, user_id=user_id, folder_id=str(fid))
+
+    return Response(status_code=status.HTTP_204_NO_CONTENT)
+
+
+# ─── Files ───
@@ -4,16 +4,16 @@ from __future__ import annotations

 import uuid
 from datetime import datetime
+from typing import Any

-from sqlalchemy import DateTime, ForeignKey, Index, Integer, String, UniqueConstraint, Text
+from pgvector.sqlalchemy import Vector
+from sqlalchemy import DateTime, ForeignKey, Index, Integer, String, Text, UniqueConstraint
+from sqlalchemy.dialects.postgresql import TSVECTOR
 from sqlalchemy.dialects.postgresql import UUID as PGUUID
 from sqlalchemy.orm import Mapped, mapped_column

 from app.core.db import Base, TenantMixin
 from app.models.owned_mixin import OwnedMixin
-from pgvector.sqlalchemy import Vector
-from sqlalchemy.dialects.postgresql import TSVECTOR
-from typing import Any


 class Folder(Base, TenantMixin, OwnedMixin):
@@ -4,7 +4,6 @@ from __future__ import annotations

 from app.plugins.base import BasePlugin
 from app.plugins.manifest import (
-    FrontendDetailTab,
    FrontendMenuItem,
    FrontendPageRoute,
    PluginManifest,
@@ -38,22 +37,35 @@ class DmsPlugin(BasePlugin):
            "dms:admin",
        ],
        menu_items=[
-            FrontendMenuItem(label_key='nav.dms', label='Dateien', path='/dms', icon='FolderOpen', group='Dateien', order=40),
-            FrontendMenuItem(label_key='nav.dms.trash', label='Papierkorb', path='/dms/trash', icon='Trash2', group='Dateien', order=41),
+            FrontendMenuItem(label_key='nav.dms', label='Dateien', path='/dms', icon='FolderOpen', group='Dateien', order=40, permission='dms:read'),
+            FrontendMenuItem(label_key='nav.dms.trash', label='Papierkorb', path='/dms/trash', icon='Trash2', group='Dateien', order=41, permission='dms:read'),
        ],
        page_routes=[
-            FrontendPageRoute(path='/dms', component='@/pages/Dms', protected=True),
-            FrontendPageRoute(path='/dms/trash', component='@/pages/DmsTrash', protected=True),
-        ],
-        detail_tabs=[
-            FrontendDetailTab(entity_type='contact', label_key='tabs.files', label='Dateien', component='@/components/contact/ContactFilesTab', icon='FolderOpen', order=40, permission='dms:read'),
+            FrontendPageRoute(path='/dms', component='@/pages/Dms', protected=True, permission='dms:read'),
+            FrontendPageRoute(path='/dms/trash', component='@/pages/DmsTrash', protected=True, permission='dms:read'),
        ],
+        # BUG (ghost component): ContactFilesTab does not exist in the
+        # frontend — tab removed until implemented (Block I-D).
+        detail_tabs=[],
        author="LeoCRM Team",
        min_app_version="1.0.0",
        hooks=["dms.before_upload"],
        contract_version="1.0.0",
    )

+    def get_entity_models(self) -> dict[str, type]:
+        """Entity types owned by DMS for the permission resolver.
+
+        ``file`` is a legacy alias still used by the permissions routes.
+        """
+        from app.plugins.builtins.dms.models import File, Folder
+
+        return {
+            "dms_file": File,
+            "dms_folder": Folder,
+            "file": File,
+        }
+
    async def on_activate(self, db, service_container, event_bus) -> None:
        """Activate plugin: register restore config + history hooks."""
        await super().on_activate(db, service_container, event_bus)
@@ -2,12 +2,10 @@

 from __future__ import annotations

-import os
 import uuid

 from fastapi import (
    APIRouter,
-    Body,
    Depends,
    File,
    Form,
@@ -17,25 +15,39 @@ from fastapi import (
    status,
 )
 from fastapi.responses import StreamingResponse
-from sqlalchemy import select, update
+from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession

 from app.core.db import get_db
 from app.core.storage import LocalStorage, get_storage_backend
 from app.core.visibility import apply_visibility_filter, check_single_entity_access
 from app.deps import get_current_user, require_permission
+
+# BUG-018 God-Object-Split: Helper/Konstanten leben jetzt in common.py;
+# Re-Exports sichern Import- und Patch-Kompatibilitaet
+# (tests patchen app.plugins.builtins.dms.routes.MAX_FILE_SIZE fuer den Upload).
+from app.plugins.builtins.dms.common import (  # noqa: F401
+    ALLOWED_MIME_PREFIXES,
+    BLOCKED_EXTENSIONS,
+    CHUNK_SIZE,
+    MAX_FILE_SIZE,
+    OFFICE_EXTENSIONS,
+    _file_storage_path,
+    _get_file_extension,
+    _is_blocked_filetype,
+    _parse_uuid,
+    _sanitize_filename,
+    chunk_size,
+)
+from app.plugins.builtins.dms.folders_routes import router as folders_router
 from app.plugins.builtins.dms.models import File as DmsFile
 from app.plugins.builtins.dms.models import Folder
 from app.plugins.builtins.dms.schemas import (
-    BulkDeleteRequest,
-    BulkMoveRequest,
    FileMetadataResponse,
    FileUpdate,
-    FolderCreate,
-    FolderUpdate,
-    ShareRemoveRequest,
-    ShareRequest,
 )
+from app.plugins.builtins.dms.search_bulk_routes import router as search_bulk_router
+from app.plugins.builtins.dms.sharing_routes import router as sharing_router
 from app.plugins.builtins.permissions.contracts import get_contract as get_perms_contract

 # Get Permission model from the permissions contract
@@ -45,460 +57,6 @@ Permission = _perms_contract.Permission
 router = APIRouter(prefix="/api/v1/dms", tags=["dms"])

 # Office file extensions mapped to Collabora file types
-OFFICE_EXTENSIONS = {
-    ".docx": "docx",
-    ".xlsx": "xlsx",
-    ".pptx": "pptx",
-}
-
-# Max file size: 100 MB
-MAX_FILE_SIZE = 100 * 1024 * 1024
-
-
-def _parse_uuid(val: str, field: str) -> uuid.UUID:
-    try:
-        return uuid.UUID(val)
-    except (ValueError, TypeError):
-        raise HTTPException(
-            400, detail={"detail": f"Invalid {field}", "code": "invalid_id"}
-        ) from None
-
-
-def _file_storage_path(tenant_id: uuid.UUID, file_id: uuid.UUID) -> str:
-    """Build relative storage path for a file (relative to storage base)."""
-    return f"{tenant_id}/{file_id}"
-
-
-def _get_file_extension(filename: str) -> str:
-    """Extract lowercase extension including dot."""
-    return os.path.splitext(filename)[1].lower()
-
-
-
-def _sanitize_filename(filename: str) -> str:
-    """Sanitize a filename for safe use in Content-Disposition headers."""
-    import re
-    # Extract basename only (strip any path components)
-    safe = os.path.basename(filename.replace('\\', '/'))
-    # Remove dangerous characters (keep alnum, dot, dash, underscore, space, unicode)
-    safe = re.sub(r'[^a-zA-Z0-9.\-_\u00c0-\u017f\u4e00-\u9fff ]', '_', safe)
-    # Collapse consecutive dots (path traversal prevention)
-    safe = re.sub(r'\.{2,}', '_', safe)
-    # Collapse multiple spaces
-    safe = re.sub(r' {2,}', ' ', safe)
-    # Strip leading dots and whitespace
-    safe = safe.lstrip('.').strip()
-    # Limit length
-    if len(safe) > 200:
-        name, ext = safe.rsplit('.', 1) if '.' in safe[:200] else (safe[:200], '')
-        safe = name[:200] + ('.' + ext if ext else '')
-    return safe or 'file'
-
-# Blocked file extensions for security
-BLOCKED_EXTENSIONS = {
-    ".exe", ".bat", ".cmd", ".sh", ".jar", ".com", ".scr", ".msi",
-    ".dll", ".vbs", ".ps1", ".app", ".bin", ".reg", ".inf",
-    ".php", ".py", ".pl", ".asp", ".aspx", ".jsp", ".svg", ".htaccess",
-    ".phtml", ".pht", ".cgi", ".cfm", ".erb",
-}
-
-# Allowed MIME types for upload validation
-ALLOWED_MIME_PREFIXES = {
-    "application/pdf",
-    "application/msword",
-    "application/vnd.openxmlformats-officedocument",
-    "application/vnd.oasis.opendocument",
-    "application/vnd.ms-excel",
-    "application/vnd.ms-powerpoint",
-    "application/zip",
-    "application/gzip",
-    "application/x-tar",
-    "application/json",
-    "application/xml",
-    "application/rtf",
-    "application/x-7z-compressed",
-    "application/x-rar-compressed",
-    "text/plain",
-    "text/csv",
-    "text/html",
-    "text/markdown",
-    "image/png",
-    "image/jpeg",
-    "image/gif",
-    "image/webp",
-    "image/bmp",
-    "image/tiff",
-    "image/x-icon",
-    "audio/",
-    "video/",
-    "application/octet-stream",
-}
-
-
-def _is_blocked_filetype(filename: str) -> bool:
-    """Check if a file has a blocked (dangerous) extension."""
-    ext = os.path.splitext(filename)[1].lower()
-    return ext in BLOCKED_EXTENSIONS
-
-
-chunk_size = 1024 * 1024  # 1MB chunks for streaming uploads
-
-# ─── Folders ───
-
-
-@router.get("/folders", dependencies=[Depends(require_permission("dms:read"))])
-async def list_folders(
-    parent_id: str | None = None,
-    db: AsyncSession = Depends(get_db),
-    current_user: dict = Depends(get_current_user),
-):
-    """AC1: GET /api/v1/dms/folders → 200 + folder tree (recursive)."""
-    tenant_id = uuid.UUID(current_user["tenant_id"])
-
-    # Fetch all non-deleted folders for tenant with visibility filter
-    user_id = uuid.UUID(current_user["user_id"])
-    is_system_admin = current_user.get("role") == "admin"
-    query = select(Folder).where(
-        Folder.tenant_id == tenant_id,
-        Folder.deleted_at.is_(None),
-    )
-    query = await apply_visibility_filter(
-        db, query, "dms_folder", Folder, user_id, tenant_id, is_system_admin
-    )
-    result = await db.execute(query)
-    all_folders = result.scalars().all()
-
-    # Build lookup map
-    folder_map: dict[uuid.UUID, dict] = {}
-    for f in all_folders:
-        folder_map[f.id] = {
-            "id": str(f.id),
-            "name": f.name,
-            "parent_id": str(f.parent_id) if f.parent_id else None,
-            "created_by": str(f.created_by),
-            "deleted_at": None,
-            "path": "",
-            "children": [],
-        }
-
-    # Build path for each folder
-    def _build_path(folder_id: uuid.UUID) -> str:
-        if folder_id not in folder_map:
-            return ""
-        f = folder_map[folder_id]
-        if f["parent_id"] and uuid.UUID(f["parent_id"]) in folder_map:
-            parent_path = _build_path(uuid.UUID(f["parent_id"]))
-            return f"{parent_path}/{f['name']}"
-        return f["name"]
-
-    for fid in folder_map:
-        folder_map[fid]["path"] = _build_path(fid)
-
-    # Build tree
-    root_nodes: list[dict] = []
-    target_parent: uuid.UUID | None = None
-    if parent_id is not None:
-        target_parent = _parse_uuid(parent_id, "parent_id")
-
-    for f in all_folders:
-        node = folder_map[f.id]
-        if f.parent_id is not None and f.parent_id in folder_map:
-            folder_map[f.parent_id]["children"].append(node)
-        elif f.parent_id is None:
-            root_nodes.append(node)
-
-    if target_parent is not None:
-        # Return children of specified parent
-        parent_node = folder_map.get(target_parent)
-        if parent_node is None:
-            raise HTTPException(
-                404, detail={"detail": "Parent folder not found", "code": "not_found"}
-            )
-        return parent_node["children"]
-
-    return root_nodes
-
-
-@router.post("/folders", status_code=status.HTTP_201_CREATED, dependencies=[Depends(require_permission("dms:write"))])
-async def create_folder(
-    body: FolderCreate,
-    db: AsyncSession = Depends(get_db),
-    current_user: dict = Depends(get_current_user),
-):
-    """AC2: POST /api/v1/dms/folders → 201, folder created with path."""
-    tenant_id = uuid.UUID(current_user["tenant_id"])
-    user_id = uuid.UUID(current_user["user_id"])
-    parent_id = _parse_uuid(body.parent_id, "parent_id") if body.parent_id else None
-
-    # Validate parent exists if specified
-    if parent_id is not None:
-        parent_result = await db.execute(
-            select(Folder).where(
-                Folder.id == parent_id,
-                Folder.tenant_id == tenant_id,
-                Folder.deleted_at.is_(None),
-            )
-        )
-        if parent_result.scalar_one_or_none() is None:
-            raise HTTPException(
-                404, detail={"detail": "Parent folder not found", "code": "not_found"}
-            )
-
-    # Check name uniqueness within same parent (non-deleted)
-    existing = await db.execute(
-        select(Folder).where(
-            Folder.tenant_id == tenant_id,
-            Folder.name == body.name,
-            Folder.parent_id == parent_id if parent_id else Folder.parent_id.is_(None),
-            Folder.deleted_at.is_(None),
-        )
-    )
-    if existing.scalar_one_or_none() is not None:
-        raise HTTPException(
-            409, detail={"detail": "Folder name already exists", "code": "duplicate"}
-        )
-
-    # Lifecycle hook: dms.folder.before_create
-    from app.core.hooks import do_action
-    await do_action("dms.folder.before_create", body, db=db, tenant_id=tenant_id, user_id=user_id)
-
-    folder = Folder(
-        tenant_id=tenant_id,
-        name=body.name,
-        parent_id=parent_id,
-        created_by=user_id,
-    )
-    db.add(folder)
-    await db.flush()
-
-    # Lifecycle hook: dms.folder.after_create
-    await do_action("dms.folder.after_create", {'id': str(folder.id), 'name': folder.name, 'parent_id': str(folder.parent_id) if folder.parent_id else None}, db=db, tenant_id=tenant_id, user_id=user_id)
-
-    # Build path
-    path = body.name
-    if parent_id is not None:
-        parent_path_result = await db.execute(select(Folder).where(Folder.id == parent_id))
-        parent_folder = parent_path_result.scalar_one_or_none()
-        if parent_folder:
-            # Recursively build path
-            path_parts = [body.name]
-            current = parent_folder
-            while current is not None:
-                path_parts.insert(0, current.name)
-                if current.parent_id is not None:
-                    cur_result = await db.execute(
-                        select(Folder).where(Folder.id == current.parent_id)
-                    )
-                    current = cur_result.scalar_one_or_none()
-                else:
-                    current = None
-            path = "/".join(path_parts)
-
-    return {
-        "id": str(folder.id),
-        "name": folder.name,
-        "parent_id": str(folder.parent_id) if folder.parent_id else None,
-        "created_by": str(folder.created_by),
-        "deleted_at": None,
-        "path": path,
-        "children": [],
-    }
-
-
-@router.patch("/folders/{folder_id}", dependencies=[Depends(require_permission("dms:write"))])
-async def update_folder(
-    folder_id: str,
-    body: FolderUpdate,
-    db: AsyncSession = Depends(get_db),
-    current_user: dict = Depends(get_current_user),
-):
-    """AC3: PATCH /api/v1/dms/folders/{id} → 200, rename/move."""
-    tenant_id = uuid.UUID(current_user["tenant_id"])
-    user_id = uuid.UUID(current_user["user_id"])
-    is_system_admin = current_user.get("role") == "admin"
-    fid = _parse_uuid(folder_id, "folder_id")
-
-    result = await db.execute(
-        select(Folder).where(
-            Folder.id == fid,
-            Folder.tenant_id == tenant_id,
-            Folder.deleted_at.is_(None),
-        )
-    )
-    folder = result.scalar_one_or_none()
-    if folder is None:
-        raise HTTPException(404, detail={"detail": "Folder not found", "code": "not_found"})
-
-    if not await check_single_entity_access(db, "dms_folder", fid, user_id, tenant_id, "write", is_system_admin):
-        raise HTTPException(403, detail={"detail": "Access denied", "code": "forbidden"})
-
-    data = body.model_dump(exclude_unset=True)
-
-    if "name" in data and data["name"] is not None:
-        # Check uniqueness if name is changing
-        new_parent_id = folder.parent_id
-        if "parent_id" in data and data["parent_id"] is not None:
-            new_parent_id = _parse_uuid(data["parent_id"], "parent_id")
-
-        dup = await db.execute(
-            select(Folder).where(
-                Folder.tenant_id == tenant_id,
-                Folder.name == data["name"],
-                Folder.id != fid,
-                Folder.parent_id == new_parent_id if new_parent_id else Folder.parent_id.is_(None),
-                Folder.deleted_at.is_(None),
-            )
-        )
-        if dup.scalar_one_or_none() is not None:
-            raise HTTPException(
-                409, detail={"detail": "Folder name already exists", "code": "duplicate"}
-            )
-        folder.name = data["name"]
-
-    if "parent_id" in data:
-        new_parent = _parse_uuid(data["parent_id"], "parent_id") if data["parent_id"] else None
-        if new_parent is not None:
-            # Validate parent exists and not creating a cycle
-            if new_parent == fid:
-                raise HTTPException(
-                    400, detail={"detail": "Cannot move folder into itself", "code": "invalid_move"}
-                )
-
-            parent_result = await db.execute(
-                select(Folder).where(
-                    Folder.id == new_parent,
-                    Folder.tenant_id == tenant_id,
-                    Folder.deleted_at.is_(None),
-                )
-            )
-            if parent_result.scalar_one_or_none() is None:
-                raise HTTPException(
-                    404, detail={"detail": "Parent folder not found", "code": "not_found"}
-                )
-
-            # Check for cycle: ensure new_parent is not a descendant of folder
-            async def _is_descendant(ancestor_id: uuid.UUID, descendant_id: uuid.UUID) -> bool:
-                cur_result = await db.execute(select(Folder).where(Folder.id == descendant_id))
-                cur = cur_result.scalar_one_or_none()
-                while cur is not None and cur.parent_id is not None:
-                    if cur.parent_id == ancestor_id:
-                        return True
-                    p_result = await db.execute(select(Folder).where(Folder.id == cur.parent_id))
-                    cur = p_result.scalar_one_or_none()
-                return False
-
-            if await _is_descendant(fid, new_parent):
-                raise HTTPException(
-                    400,
-                    detail={
-                        "detail": "Cannot move folder into its own descendant",
-                        "code": "invalid_move",
-                    },
-                )
-
-        folder.parent_id = new_parent
-
-    await db.flush()
-
-    # Build path
-    path_parts = [folder.name]
-    current_id = folder.parent_id
-    while current_id is not None:
-        cur_result = await db.execute(select(Folder).where(Folder.id == current_id))
-        cur = cur_result.scalar_one_or_none()
-        if cur is None:
-            break
-        path_parts.insert(0, cur.name)
-        current_id = cur.parent_id
-    path = "/".join(path_parts)
-
-    return {
-        "id": str(folder.id),
-        "name": folder.name,
-        "parent_id": str(folder.parent_id) if folder.parent_id else None,
-        "created_by": str(folder.created_by),
-        "deleted_at": None,
-        "path": path,
-        "children": [],
-    }
-
-
-@router.delete("/folders/{folder_id}", status_code=status.HTTP_204_NO_CONTENT, dependencies=[Depends(require_permission("dms:delete"))])
-async def delete_folder(
-    folder_id: str,
-    db: AsyncSession = Depends(get_db),
-    current_user: dict = Depends(get_current_user),
-):
-    """AC4: DELETE /api/v1/dms/folders/{id} → 204, soft-delete with cascade."""
-    tenant_id = uuid.UUID(current_user["tenant_id"])
-    user_id = uuid.UUID(current_user["user_id"])
-    is_system_admin = current_user.get("role") == "admin"
-    fid = _parse_uuid(folder_id, "folder_id")
-
-    result = await db.execute(
-        select(Folder).where(
-            Folder.id == fid,
-            Folder.tenant_id == tenant_id,
-            Folder.deleted_at.is_(None),
-        )
-    )
-    folder = result.scalar_one_or_none()
-    if folder is None:
-        raise HTTPException(404, detail={"detail": "Folder not found", "code": "not_found"})
-
-    if not await check_single_entity_access(db, "dms_folder", fid, user_id, tenant_id, "delete", is_system_admin):
-        raise HTTPException(403, detail={"detail": "Access denied", "code": "forbidden"})
-
-    # Lifecycle hook: dms.folder.before_delete
-    from app.core.hooks import do_action
-    await do_action("dms.folder.before_delete", db=db, tenant_id=tenant_id, user_id=user_id, folder_id=str(fid))
-
-    from datetime import UTC, datetime
-
-    now = datetime.now(UTC)
-
-    # Recursively collect all descendant folder IDs
-    all_folder_ids: list[uuid.UUID] = [fid]
-    queue: list[uuid.UUID] = [fid]
-    while queue:
-        current_id = queue.pop(0)
-        children_result = await db.execute(
-            select(Folder).where(
-                Folder.parent_id == current_id,
-                Folder.tenant_id == tenant_id,
-                Folder.deleted_at.is_(None),
-            )
-        )
-        for child in children_result.scalars().all():
-            all_folder_ids.append(child.id)
-            queue.append(child.id)
-
-    # Soft-delete all folders
-    await db.execute(update(Folder).where(Folder.id.in_(all_folder_ids)).values(deleted_at=now))
-
-    # Soft-delete all files in those folders
-    await db.execute(
-        update(DmsFile)
-        .where(
-            DmsFile.tenant_id == tenant_id,
-            DmsFile.folder_id.in_(all_folder_ids),
-            DmsFile.deleted_at.is_(None),
-        )
-        .values(deleted_at=now)
-    )
-
-    await db.flush()
-
-    # Lifecycle hook: dms.folder.after_delete
-    from app.core.hooks import do_action
-    await do_action("dms.folder.after_delete", db=db, tenant_id=tenant_id, user_id=user_id, folder_id=str(fid))
-
-    return Response(status_code=status.HTTP_204_NO_CONTENT)
-
-
-# ─── Files ───
-
-
@router.post("/files/upload", status_code=status.HTTP_201_CREATED, response_model=FileMetadataResponse, dependencies=[Depends(require_permission("dms:write"))])
 async def upload_file(
    file: UploadFile = File(...),
@@ -547,7 +105,7 @@ async def upload_file(

    # Stream file to storage — avoid loading entire file into RAM
    import hashlib
-    chunk_size = 1024 * 1024  # 1MB chunks
+    chunk_size = 1024 * 1024  # noqa: F811 (Original-Shadowing im Original auch so)
    sha256 = hashlib.sha256()
    file_size = 0

@@ -1087,406 +645,7 @@ async def download_file(
        )


-@router.post("/files/{file_id}/edit-session", dependencies=[Depends(require_permission("dms:write"))])
-async def create_edit_session(
-    file_id: str,
-    db: AsyncSession = Depends(get_db),
-    current_user: dict = Depends(get_current_user),
-):
-    """AC11: POST /api/v1/dms/files/{id}/edit-session → 200 + Collabora config."""
-    tenant_id = uuid.UUID(current_user["tenant_id"])
-    user_id = current_user["user_id"]
-    user_name = current_user.get("name", "Unknown")
-    is_system_admin = current_user.get("role") == "admin"
-    fid = _parse_uuid(file_id, "file_id")
-
-    result = await db.execute(
-        select(DmsFile).where(
-            DmsFile.id == fid,
-            DmsFile.tenant_id == tenant_id,
-            DmsFile.deleted_at.is_(None),
-        )
-    )
-    dms_file = result.scalar_one_or_none()
-    if dms_file is None:
-        raise HTTPException(404, detail={"detail": "File not found", "code": "not_found"})
-
-    if not await check_single_entity_access(db, "dms_file", fid, user_id, tenant_id, "write", is_system_admin):
-        raise HTTPException(403, detail={"detail": "Access denied", "code": "forbidden"})
-
-    ext = _get_file_extension(dms_file.name)
-    if ext not in OFFICE_EXTENSIONS:
-        raise HTTPException(
-            400,
-            detail={
-                "detail": "Only Office files (docx, xlsx, pptx) are supported",
-                "code": "not_office",
-            },
-        )
-
-    file_type = OFFICE_EXTENSIONS[ext]
-    download_url = f"/api/v1/dms/files/{fid}/preview"
-    callback_url = f"/api/v1/dms/files/{fid}/callback"
-
-    config = {
-        "document": {
-            "fileType": file_type,
-            "key": str(uuid.uuid4()),
-            "title": dms_file.name,
-            "url": download_url,
-        },
-        "editorConfig": {
-            "mode": "edit",
-            "callbackUrl": callback_url,
-            "user": {
-                "id": user_id,
-                "name": user_name,
-            },
-        },
-    }
-
-    return config
-
-
-# ─── Internal Sharing ───
-
-
-@router.post("/files/{file_id}/share", dependencies=[Depends(require_permission("dms:share"))])
-async def share_file(
-    file_id: str,
-    body: ShareRequest,
-    db: AsyncSession = Depends(get_db),
-    current_user: dict = Depends(get_current_user),
-):
-    """AC12: POST /api/v1/dms/files/{id}/share → 200, internal share created."""
-    tenant_id = uuid.UUID(current_user["tenant_id"])
-    user_id = uuid.UUID(current_user["user_id"])
-    is_system_admin = current_user.get("role") == "admin"
-    fid = _parse_uuid(file_id, "file_id")
-
-    # Verify file exists
-    file_result = await db.execute(
-        select(DmsFile).where(
-            DmsFile.id == fid,
-            DmsFile.tenant_id == tenant_id,
-            DmsFile.deleted_at.is_(None),
-        )
-    )
-    if file_result.scalar_one_or_none() is None:
-        raise HTTPException(404, detail={"detail": "File not found", "code": "not_found"})
-
-    if not await check_single_entity_access(db, "dms_file", fid, user_id, tenant_id, "share", is_system_admin):
-        raise HTTPException(403, detail={"detail": "Access denied", "code": "forbidden"})
-
-    created_perms: list[dict] = []
-
-    for uid_str in body.user_ids:
-        uid = _parse_uuid(uid_str, "user_id")
-        # Check if already exists
-        existing = await db.execute(
-            select(Permission).where(
-                Permission.tenant_id == tenant_id,
-                Permission.file_id == fid,
-                Permission.user_id == uid,
-                Permission.access_level == body.access_level,
-            )
-        )
-        if existing.scalar_one_or_none() is None:
-            perm = Permission(
-                tenant_id=tenant_id,
-                file_id=fid,
-                user_id=uid,
-                group_id=None,
-                access_level=body.access_level,
-            )
-            db.add(perm)
-            await db.flush()
-            created_perms.append(
-                {
-                    "id": str(perm.id),
-                    "file_id": str(fid),
-                    "user_id": str(uid),
-                    "group_id": None,
-                    "access_level": body.access_level,
-                }
-            )
-
-    for gid_str in body.group_ids:
-        gid = _parse_uuid(gid_str, "group_id")
-        existing = await db.execute(
-            select(Permission).where(
-                Permission.tenant_id == tenant_id,
-                Permission.file_id == fid,
-                Permission.group_id == gid,
-                Permission.access_level == body.access_level,
-            )
-        )
-        if existing.scalar_one_or_none() is None:
-            perm = Permission(
-                tenant_id=tenant_id,
-                file_id=fid,
-                user_id=uuid.UUID(current_user["user_id"]),
-                group_id=gid,
-                access_level=body.access_level,
-            )
-            db.add(perm)
-            await db.flush()
-            created_perms.append(
-                {
-                    "id": str(perm.id),
-                    "file_id": str(fid),
-                    "user_id": str(perm.user_id),
-                    "group_id": str(gid),
-                    "access_level": body.access_level,
-                }
-            )
-
-    return {
-        "file_id": str(fid),
-        "shared_with": created_perms,
-        "count": len(created_perms),
-    }
-
-
-@router.delete("/files/{file_id}/share", status_code=status.HTTP_204_NO_CONTENT, dependencies=[Depends(require_permission("dms:share"))])
-async def remove_share(
-    file_id: str,
-    body: ShareRemoveRequest = Body(...),
-    db: AsyncSession = Depends(get_db),
-    current_user: dict = Depends(get_current_user),
-):
-    """AC13: DELETE /api/v1/dms/files/{id}/share → 204, share removed."""
-    tenant_id = uuid.UUID(current_user["tenant_id"])
-    user_id = uuid.UUID(current_user["user_id"])
-    is_system_admin = current_user.get("role") == "admin"
-    fid = _parse_uuid(file_id, "file_id")
-
-    if not await check_single_entity_access(db, "dms_file", fid, user_id, tenant_id, "share", is_system_admin):
-        raise HTTPException(403, detail={"detail": "Access denied", "code": "forbidden"})
-
-    if body.user_id:
-        uid = _parse_uuid(body.user_id, "user_id")
-        result = await db.execute(
-            select(Permission).where(
-                Permission.tenant_id == tenant_id,
-                Permission.file_id == fid,
-                Permission.user_id == uid,
-            )
-        )
-        perms = result.scalars().all()
-        for p in perms:
-            await db.delete(p)
-
-    if body.group_id:
-        gid = _parse_uuid(body.group_id, "group_id")
-        result = await db.execute(
-            select(Permission).where(
-                Permission.tenant_id == tenant_id,
-                Permission.file_id == fid,
-                Permission.group_id == gid,
-            )
-        )
-        perms = result.scalars().all()
-        for p in perms:
-            await db.delete(p)
-
-    await db.flush()
-    return Response(status_code=status.HTTP_204_NO_CONTENT)
-
-
-# ─── Search & Bulk ───
-
-
-@router.get("/search", dependencies=[Depends(require_permission("dms:read"))])
-async def search_files(
-    q: str,
-    db: AsyncSession = Depends(get_db),
-    current_user: dict = Depends(get_current_user),
-):
-    """AC16: GET /api/v1/dms/search?q=text → 200 + matching files (ILIKE)."""
-    tenant_id = uuid.UUID(current_user["tenant_id"])
-    user_id = uuid.UUID(current_user["user_id"])
-    is_system_admin = current_user.get("role") == "admin"
-
-    query = select(DmsFile).where(
-        DmsFile.tenant_id == tenant_id,
-        DmsFile.deleted_at.is_(None),
-        DmsFile.name.ilike(f"%{q}%"),
-    )
-    query = await apply_visibility_filter(
-        db, query, "dms_file", DmsFile, user_id, tenant_id, is_system_admin
-    )
-    result = await db.execute(query)
-    files = result.scalars().all()
-
-    return [
-        {
-            "id": str(f.id),
-            "name": f.name,
-            "folder_id": str(f.folder_id) if f.folder_id else None,
-            "uploaded_by": str(f.uploaded_by),
-            "mime_type": f.mime_type,
-            "size_bytes": f.size_bytes,
-            "deleted_at": None,
-            "created_at": f.created_at.isoformat() if f.created_at else None,
-        }
-        for f in files
-    ]
-
-
-@router.get("/shared-with-me", dependencies=[Depends(require_permission("dms:read"))])
-async def shared_with_me(
-    db: AsyncSession = Depends(get_db),
-    current_user: dict = Depends(get_current_user),
-):
-    """AC17: GET /api/v1/dms/shared-with-me → 200 + shared files list."""
-    tenant_id = uuid.UUID(current_user["tenant_id"])
-    user_id = uuid.UUID(current_user["user_id"])
-    is_system_admin = current_user.get("role") == "admin"
-
-    # Query permissions for this user and join with files
-    perm_result = await db.execute(
-        select(Permission).where(
-            Permission.tenant_id == tenant_id,
-            Permission.user_id == user_id,
-        )
-    )
-    perms = perm_result.scalars().all()
-    file_ids = {p.file_id for p in perms}
-
-    if not file_ids:
-        return {"items": [], "total": 0}
-
-    query = select(DmsFile).where(
-        DmsFile.tenant_id == tenant_id,
-        DmsFile.id.in_(file_ids),
-        DmsFile.deleted_at.is_(None),
-    )
-    query = await apply_visibility_filter(
-        db, query, "dms_file", DmsFile, user_id, tenant_id, is_system_admin
-    )
-    result = await db.execute(query)
-    files = result.scalars().all()
-
-    # Map permissions for access_level
-    perm_map: dict[uuid.UUID, str] = {}
-    for p in perms:
-        if p.file_id in file_ids:
-            perm_map[p.file_id] = p.access_level
-
-    return [
-        {
-            "id": str(f.id),
-            "name": f.name,
-            "folder_id": str(f.folder_id) if f.folder_id else None,
-            "uploaded_by": str(f.uploaded_by),
-            "mime_type": f.mime_type,
-            "size_bytes": f.size_bytes,
-            "access_level": perm_map.get(f.id, "read"),
-            "created_at": f.created_at.isoformat() if f.created_at else None,
-        }
-        for f in files
-    ]
-
-
-@router.post("/files/bulk-move", dependencies=[Depends(require_permission("dms:write"))])
-async def bulk_move(
-    body: BulkMoveRequest,
-    db: AsyncSession = Depends(get_db),
-    current_user: dict = Depends(get_current_user),
-):
-    """AC18: POST /api/v1/dms/files/bulk-move → 200, files moved."""
-    tenant_id = uuid.UUID(current_user["tenant_id"])
-    user_id = uuid.UUID(current_user["user_id"])
-    is_system_admin = current_user.get("role") == "admin"
-    target_folder_id = (
-        _parse_uuid(body.target_folder_id, "target_folder_id") if body.target_folder_id else None
-    )
-
-    # Validate target folder if specified
-    if target_folder_id is not None:
-        folder_result = await db.execute(
-            select(Folder).where(
-                Folder.id == target_folder_id,
-                Folder.tenant_id == tenant_id,
-                Folder.deleted_at.is_(None),
-            )
-        )
-        if folder_result.scalar_one_or_none() is None:
-            raise HTTPException(
-                404, detail={"detail": "Target folder not found", "code": "not_found"}
-            )
-
-    file_ids = [_parse_uuid(fid, "file_id") for fid in body.file_ids]
-
-    query = select(DmsFile).where(
-        DmsFile.tenant_id == tenant_id,
-        DmsFile.id.in_(file_ids),
-        DmsFile.deleted_at.is_(None),
-    )
-    query = await apply_visibility_filter(
-        db, query, "dms_file", DmsFile, user_id, tenant_id, is_system_admin
-    )
-    result = await db.execute(query)
-    files = result.scalars().all()
-
-    moved_count = 0
-    for f in files:
-        f.folder_id = target_folder_id
-        moved_count += 1
-
-    await db.flush()
-
-    return {
-        "moved": moved_count,
-        "file_ids": [str(fid) for fid in file_ids],
-        "target_folder_id": str(target_folder_id) if target_folder_id else None,
-    }
-
-
-@router.post("/files/bulk-delete", dependencies=[Depends(require_permission("dms:delete"))])
-async def bulk_delete(
-    body: BulkDeleteRequest,
-    db: AsyncSession = Depends(get_db),
-    current_user: dict = Depends(get_current_user),
-):
-    """AC19: POST /api/v1/dms/files/bulk-delete → 200, files soft-deleted."""
-    tenant_id = uuid.UUID(current_user["tenant_id"])
-    user_id = uuid.UUID(current_user["user_id"])
-    is_system_admin = current_user.get("role") == "admin"
-    file_ids = [_parse_uuid(fid, "file_id") for fid in body.file_ids]
-
-    from datetime import UTC, datetime
-
-    now = datetime.now(UTC)
-
-    # Apply visibility filter to only delete files user has access to
-    query = select(DmsFile).where(
-        DmsFile.tenant_id == tenant_id,
-        DmsFile.id.in_(file_ids),
-        DmsFile.deleted_at.is_(None),
-    )
-    query = await apply_visibility_filter(
-        db, query, "dms_file", DmsFile, user_id, tenant_id, is_system_admin
-    )
-    result = await db.execute(query)
-    accessible_files = result.scalars().all()
-    accessible_ids = [f.id for f in accessible_files]
-
-    result = await db.execute(
-        update(DmsFile)
-        .where(
-            DmsFile.tenant_id == tenant_id,
-            DmsFile.id.in_(accessible_ids),
-            DmsFile.deleted_at.is_(None),
-        )
-        .values(deleted_at=now)
-    )
-
-    deleted_count = result.rowcount
-    await db.flush()
-
-    return {
-        "deleted": deleted_count,
-        "file_ids": body.file_ids,
-    }
+# Sub-Router einbinden (BUG-018 Split): folders, sharing/collabora, search/bulk
+router.include_router(folders_router)
+router.include_router(sharing_router)
+router.include_router(search_bulk_router)
@@ -0,0 +1,223 @@
+"""DMS Search / shared-with-me / Bulk Routen — extrahiert aus routes.py (BUG-018)."""
+
+from __future__ import annotations
+
+import uuid
+
+from fastapi import (
+    APIRouter,
+    Depends,
+    HTTPException,
+)
+from sqlalchemy import select, update
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.db import get_db
+from app.core.visibility import apply_visibility_filter
+from app.deps import get_current_user, require_permission
+from app.plugins.builtins.dms.common import (
+    _parse_uuid,
+)
+from app.plugins.builtins.dms.models import File as DmsFile
+from app.plugins.builtins.dms.models import Folder
+from app.plugins.builtins.dms.schemas import BulkDeleteRequest, BulkMoveRequest
+from app.plugins.builtins.permissions.contracts import get_contract as get_perms_contract
+
+_perms_contract = get_perms_contract()
+Permission = _perms_contract.Permission
+
+router = APIRouter(tags=["dms"])
+
+@router.get("/search", dependencies=[Depends(require_permission("dms:read"))])
+async def search_files(
+    q: str,
+    db: AsyncSession = Depends(get_db),
+    current_user: dict = Depends(get_current_user),
+):
+    """AC16: GET /api/v1/dms/search?q=text → 200 + matching files (ILIKE)."""
+    tenant_id = uuid.UUID(current_user["tenant_id"])
+    user_id = uuid.UUID(current_user["user_id"])
+    is_system_admin = current_user.get("role") == "admin"
+
+    query = select(DmsFile).where(
+        DmsFile.tenant_id == tenant_id,
+        DmsFile.deleted_at.is_(None),
+        DmsFile.name.ilike(f"%{q}%"),
+    )
+    query = await apply_visibility_filter(
+        db, query, "dms_file", DmsFile, user_id, tenant_id, is_system_admin
+    )
+    result = await db.execute(query)
+    files = result.scalars().all()
+
+    return [
+        {
+            "id": str(f.id),
+            "name": f.name,
+            "folder_id": str(f.folder_id) if f.folder_id else None,
+            "uploaded_by": str(f.uploaded_by),
+            "mime_type": f.mime_type,
+            "size_bytes": f.size_bytes,
+            "deleted_at": None,
+            "created_at": f.created_at.isoformat() if f.created_at else None,
+        }
+        for f in files
+    ]
+
+
+@router.get("/shared-with-me", dependencies=[Depends(require_permission("dms:read"))])
+async def shared_with_me(
+    db: AsyncSession = Depends(get_db),
+    current_user: dict = Depends(get_current_user),
+):
+    """AC17: GET /api/v1/dms/shared-with-me → 200 + shared files list."""
+    tenant_id = uuid.UUID(current_user["tenant_id"])
+    user_id = uuid.UUID(current_user["user_id"])
+    is_system_admin = current_user.get("role") == "admin"
+
+    # Query permissions for this user and join with files
+    perm_result = await db.execute(
+        select(Permission).where(
+            Permission.tenant_id == tenant_id,
+            Permission.user_id == user_id,
+        )
+    )
+    perms = perm_result.scalars().all()
+    file_ids = {p.file_id for p in perms}
+
+    if not file_ids:
+        return []
+
+    query = select(DmsFile).where(
+        DmsFile.tenant_id == tenant_id,
+        DmsFile.id.in_(file_ids),
+        DmsFile.deleted_at.is_(None),
+    )
+    query = await apply_visibility_filter(
+        db, query, "dms_file", DmsFile, user_id, tenant_id, is_system_admin
+    )
+    result = await db.execute(query)
+    files = result.scalars().all()
+
+    # Map permissions for access_level
+    perm_map: dict[uuid.UUID, str] = {}
+    for p in perms:
+        if p.file_id in file_ids:
+            perm_map[p.file_id] = p.access_level
+
+    return [
+        {
+            "id": str(f.id),
+            "name": f.name,
+            "folder_id": str(f.folder_id) if f.folder_id else None,
+            "uploaded_by": str(f.uploaded_by),
+            "mime_type": f.mime_type,
+            "size_bytes": f.size_bytes,
+            "access_level": perm_map.get(f.id, "read"),
+            "created_at": f.created_at.isoformat() if f.created_at else None,
+        }
+        for f in files
+    ]
+
+
+@router.post("/files/bulk-move", dependencies=[Depends(require_permission("dms:write"))])
+async def bulk_move(
+    body: BulkMoveRequest,
+    db: AsyncSession = Depends(get_db),
+    current_user: dict = Depends(get_current_user),
+):
+    """AC18: POST /api/v1/dms/files/bulk-move → 200, files moved."""
+    tenant_id = uuid.UUID(current_user["tenant_id"])
+    user_id = uuid.UUID(current_user["user_id"])
+    is_system_admin = current_user.get("role") == "admin"
+    target_folder_id = (
+        _parse_uuid(body.target_folder_id, "target_folder_id") if body.target_folder_id else None
+    )
+
+    # Validate target folder if specified
+    if target_folder_id is not None:
+        folder_result = await db.execute(
+            select(Folder).where(
+                Folder.id == target_folder_id,
+                Folder.tenant_id == tenant_id,
+                Folder.deleted_at.is_(None),
+            )
+        )
+        if folder_result.scalar_one_or_none() is None:
+            raise HTTPException(
+                404, detail={"detail": "Target folder not found", "code": "not_found"}
+            )
+
+    file_ids = [_parse_uuid(fid, "file_id") for fid in body.file_ids]
+
+    query = select(DmsFile).where(
+        DmsFile.tenant_id == tenant_id,
+        DmsFile.id.in_(file_ids),
+        DmsFile.deleted_at.is_(None),
+    )
+    query = await apply_visibility_filter(
+        db, query, "dms_file", DmsFile, user_id, tenant_id, is_system_admin
+    )
+    result = await db.execute(query)
+    files = result.scalars().all()
+
+    moved_count = 0
+    for f in files:
+        f.folder_id = target_folder_id
+        moved_count += 1
+
+    await db.flush()
+
+    return {
+        "moved": moved_count,
+        "file_ids": [str(fid) for fid in file_ids],
+        "target_folder_id": str(target_folder_id) if target_folder_id else None,
+    }
+
+
+@router.post("/files/bulk-delete", dependencies=[Depends(require_permission("dms:delete"))])
+async def bulk_delete(
+    body: BulkDeleteRequest,
+    db: AsyncSession = Depends(get_db),
+    current_user: dict = Depends(get_current_user),
+):
+    """AC19: POST /api/v1/dms/files/bulk-delete → 200, files soft-deleted."""
+    tenant_id = uuid.UUID(current_user["tenant_id"])
+    user_id = uuid.UUID(current_user["user_id"])
+    is_system_admin = current_user.get("role") == "admin"
+    file_ids = [_parse_uuid(fid, "file_id") for fid in body.file_ids]
+
+    from datetime import UTC, datetime
+
+    now = datetime.now(UTC)
+
+    # Apply visibility filter to only delete files user has access to
+    query = select(DmsFile).where(
+        DmsFile.tenant_id == tenant_id,
+        DmsFile.id.in_(file_ids),
+        DmsFile.deleted_at.is_(None),
+    )
+    query = await apply_visibility_filter(
+        db, query, "dms_file", DmsFile, user_id, tenant_id, is_system_admin
+    )
+    result = await db.execute(query)
+    accessible_files = result.scalars().all()
+    accessible_ids = [f.id for f in accessible_files]
+
+    result = await db.execute(
+        update(DmsFile)
+        .where(
+            DmsFile.tenant_id == tenant_id,
+            DmsFile.id.in_(accessible_ids),
+            DmsFile.deleted_at.is_(None),
+        )
+        .values(deleted_at=now)
+    )
+
+    deleted_count = result.rowcount
+    await db.flush()
+
+    return {
+        "deleted": deleted_count,
+        "file_ids": body.file_ids,
+    }
@@ -0,0 +1,242 @@
+"""DMS Edit-Session/Collabora & Sharing Routen — extrahiert aus routes.py (BUG-018)."""
+
+from __future__ import annotations
+
+import uuid
+
+from fastapi import (
+    APIRouter,
+    Body,
+    Depends,
+    HTTPException,
+    Response,
+    status,
+)
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.db import get_db
+from app.core.visibility import check_single_entity_access
+from app.deps import get_current_user, require_permission
+from app.plugins.builtins.dms.common import (
+    OFFICE_EXTENSIONS,
+    _get_file_extension,
+    _parse_uuid,
+)
+from app.plugins.builtins.dms.models import File as DmsFile
+from app.plugins.builtins.dms.schemas import ShareRemoveRequest, ShareRequest
+from app.plugins.builtins.permissions.contracts import get_contract as get_perms_contract
+
+_perms_contract = get_perms_contract()
+Permission = _perms_contract.Permission
+
+router = APIRouter(tags=["dms"])
+
+@router.post("/files/{file_id}/edit-session", dependencies=[Depends(require_permission("dms:write"))])
+async def create_edit_session(
+    file_id: str,
+    db: AsyncSession = Depends(get_db),
+    current_user: dict = Depends(get_current_user),
+):
+    """AC11: POST /api/v1/dms/files/{id}/edit-session → 200 + Collabora config."""
+    tenant_id = uuid.UUID(current_user["tenant_id"])
+    user_id = current_user["user_id"]
+    user_name = current_user.get("name", "Unknown")
+    is_system_admin = current_user.get("role") == "admin"
+    fid = _parse_uuid(file_id, "file_id")
+
+    result = await db.execute(
+        select(DmsFile).where(
+            DmsFile.id == fid,
+            DmsFile.tenant_id == tenant_id,
+            DmsFile.deleted_at.is_(None),
+        )
+    )
+    dms_file = result.scalar_one_or_none()
+    if dms_file is None:
+        raise HTTPException(404, detail={"detail": "File not found", "code": "not_found"})
+
+    if not await check_single_entity_access(db, "dms_file", fid, user_id, tenant_id, "write", is_system_admin):
+        raise HTTPException(403, detail={"detail": "Access denied", "code": "forbidden"})
+
+    ext = _get_file_extension(dms_file.name)
+    if ext not in OFFICE_EXTENSIONS:
+        raise HTTPException(
+            400,
+            detail={
+                "detail": "Only Office files (docx, xlsx, pptx) are supported",
+                "code": "not_office",
+            },
+        )
+
+    file_type = OFFICE_EXTENSIONS[ext]
+    download_url = f"/api/v1/dms/files/{fid}/preview"
+    callback_url = f"/api/v1/dms/files/{fid}/callback"
+
+    config = {
+        "document": {
+            "fileType": file_type,
+            "key": str(uuid.uuid4()),
+            "title": dms_file.name,
+            "url": download_url,
+        },
+        "editorConfig": {
+            "mode": "edit",
+            "callbackUrl": callback_url,
+            "user": {
+                "id": user_id,
+                "name": user_name,
+            },
+        },
+    }
+
+    return config
+
+
+# ─── Internal Sharing ───
+
+
+@router.post("/files/{file_id}/share", dependencies=[Depends(require_permission("dms:share"))])
+async def share_file(
+    file_id: str,
+    body: ShareRequest,
+    db: AsyncSession = Depends(get_db),
+    current_user: dict = Depends(get_current_user),
+):
+    """AC12: POST /api/v1/dms/files/{id}/share → 200, internal share created."""
+    tenant_id = uuid.UUID(current_user["tenant_id"])
+    user_id = uuid.UUID(current_user["user_id"])
+    is_system_admin = current_user.get("role") == "admin"
+    fid = _parse_uuid(file_id, "file_id")
+
+    # Verify file exists
+    file_result = await db.execute(
+        select(DmsFile).where(
+            DmsFile.id == fid,
+            DmsFile.tenant_id == tenant_id,
+            DmsFile.deleted_at.is_(None),
+        )
+    )
+    if file_result.scalar_one_or_none() is None:
+        raise HTTPException(404, detail={"detail": "File not found", "code": "not_found"})
+
+    if not await check_single_entity_access(db, "dms_file", fid, user_id, tenant_id, "share", is_system_admin):
+        raise HTTPException(403, detail={"detail": "Access denied", "code": "forbidden"})
+
+    created_perms: list[dict] = []
+
+    for uid_str in body.user_ids:
+        uid = _parse_uuid(uid_str, "user_id")
+        # Check if already exists
+        existing = await db.execute(
+            select(Permission).where(
+                Permission.tenant_id == tenant_id,
+                Permission.file_id == fid,
+                Permission.user_id == uid,
+                Permission.access_level == body.access_level,
+            )
+        )
+        if existing.scalar_one_or_none() is None:
+            perm = Permission(
+                tenant_id=tenant_id,
+                file_id=fid,
+                user_id=uid,
+                group_id=None,
+                access_level=body.access_level,
+            )
+            db.add(perm)
+            await db.flush()
+            created_perms.append(
+                {
+                    "id": str(perm.id),
+                    "file_id": str(fid),
+                    "user_id": str(uid),
+                    "group_id": None,
+                    "access_level": body.access_level,
+                }
+            )
+
+    for gid_str in body.group_ids:
+        gid = _parse_uuid(gid_str, "group_id")
+        existing = await db.execute(
+            select(Permission).where(
+                Permission.tenant_id == tenant_id,
+                Permission.file_id == fid,
+                Permission.group_id == gid,
+                Permission.access_level == body.access_level,
+            )
+        )
+        if existing.scalar_one_or_none() is None:
+            perm = Permission(
+                tenant_id=tenant_id,
+                file_id=fid,
+                user_id=uuid.UUID(current_user["user_id"]),
+                group_id=gid,
+                access_level=body.access_level,
+            )
+            db.add(perm)
+            await db.flush()
+            created_perms.append(
+                {
+                    "id": str(perm.id),
+                    "file_id": str(fid),
+                    "user_id": str(perm.user_id),
+                    "group_id": str(gid),
+                    "access_level": body.access_level,
+                }
+            )
+
+    return {
+        "file_id": str(fid),
+        "shared_with": created_perms,
+        "count": len(created_perms),
+    }
+
+
+@router.delete("/files/{file_id}/share", status_code=status.HTTP_204_NO_CONTENT, dependencies=[Depends(require_permission("dms:share"))])
+async def remove_share(
+    file_id: str,
+    body: ShareRemoveRequest = Body(...),
+    db: AsyncSession = Depends(get_db),
+    current_user: dict = Depends(get_current_user),
+):
+    """AC13: DELETE /api/v1/dms/files/{id}/share → 204, share removed."""
+    tenant_id = uuid.UUID(current_user["tenant_id"])
+    user_id = uuid.UUID(current_user["user_id"])
+    is_system_admin = current_user.get("role") == "admin"
+    fid = _parse_uuid(file_id, "file_id")
+
+    if not await check_single_entity_access(db, "dms_file", fid, user_id, tenant_id, "share", is_system_admin):
+        raise HTTPException(403, detail={"detail": "Access denied", "code": "forbidden"})
+
+    if body.user_id:
+        uid = _parse_uuid(body.user_id, "user_id")
+        result = await db.execute(
+            select(Permission).where(
+                Permission.tenant_id == tenant_id,
+                Permission.file_id == fid,
+                Permission.user_id == uid,
+            )
+        )
+        perms = result.scalars().all()
+        for p in perms:
+            await db.delete(p)
+
+    if body.group_id:
+        gid = _parse_uuid(body.group_id, "group_id")
+        result = await db.execute(
+            select(Permission).where(
+                Permission.tenant_id == tenant_id,
+                Permission.file_id == fid,
+                Permission.group_id == gid,
+            )
+        )
+        perms = result.scalars().all()
+        for p in perms:
+            await db.delete(p)
+
+    await db.flush()
+    return Response(status_code=status.HTTP_204_NO_CONTENT)
+
+
+# ─── Search & Bulk ───
@@ -5,7 +5,7 @@ from __future__ import annotations
 from typing import Any

 from app.plugins.base import BasePlugin
-from app.plugins.manifest import FrontendDetailTab, PluginManifest, PluginRouteDef
+from app.plugins.manifest import PluginManifest, PluginRouteDef


 class EntityLinksPlugin(BasePlugin):
@@ -42,9 +42,9 @@ class EntityLinksPlugin(BasePlugin):
            "entity_links:delete",
        ],
        is_core=True,
-        detail_tabs=[
-            FrontendDetailTab(entity_type='contact', label_key='tabs.links', label='Verknüpfungen', component='@/components/contact/ContactLinksTab', icon='Link', order=60, permission='entity_links:read'),
-        ],
+        # BUG (ghost component): ContactLinksTab does not exist in the
+        # frontend — tab removed until implemented (Block I-D).
+        detail_tabs=[],

        author="LeoCRM Team",
        min_app_version="1.0.0",
@@ -40,6 +40,10 @@ class GraphRAGPlugin(BasePlugin):

    async def on_activate(self, db, service_container, event_bus) -> None:
        """Activate plugin: register GraphRAG search provider."""
+        # Base class first (event subscriptions etc.), then own registrations
+        # so a failure in our code cannot leave the base half-initialized (ARCH-037).
+        await super().on_activate(db, service_container, event_bus)
+
        from app.plugins.builtins.graph_rag.provider import GraphRAGSearchProvider
        from app.plugins.builtins.unified_search.contracts import get_search_registry

@@ -50,8 +54,6 @@ class GraphRAGPlugin(BasePlugin):
            import logging
            logging.getLogger(__name__).exception("Failed to register GraphRAGSearchProvider")

-        await super().on_activate(db, service_container, event_bus)
-
    async def on_deactivate(self, db, service_container, event_bus) -> None:
        """Deactivate plugin: unregister search provider and contract."""
        from app.plugins.builtins.unified_search.contracts import get_search_registry
@@ -25,7 +25,8 @@ async def cleanup_knowledge_job(ctx: dict[str, Any]) -> None:
    Runs daily. Keeps approved extractions indefinitely.
    Iterates per-tenant for RLS compliance.
    """
-    from sqlalchemy import text as sa_text, delete as sa_delete
+    from sqlalchemy import delete as sa_delete
+    from sqlalchemy import text as sa_text

    from app.core.db import get_worker_session_factory

@@ -1,12 +1,17 @@
 """Knowledge extraction models — tracks LLM extractions and review queue."""
 from __future__ import annotations
+
 import uuid
 from datetime import datetime
-from sqlalchemy import DateTime, Float, ForeignKey, Index, Integer, String, Text, func
-from sqlalchemy.dialects.postgresql import JSONB, UUID as PGUUID
+
+from sqlalchemy import DateTime, Float, ForeignKey, Index, String, Text, func
+from sqlalchemy.dialects.postgresql import JSONB
+from sqlalchemy.dialects.postgresql import UUID as PGUUID
 from sqlalchemy.orm import Mapped, mapped_column
+
 from app.core.db import Base, TenantMixin

+
 class KnowledgeExtraction(Base, TenantMixin):
    """Tracks a single knowledge extraction run from a source (wiki, dms, mail, comm)."""
    __tablename__ = "knowledge_extractions"
@@ -1,8 +1,10 @@
 """Knowledge plugin — LLM-based entity/relationship extraction, ask-knowledge, review queue."""
 from __future__ import annotations
+
 import logging
 import uuid
 from typing import Any
+
 from app.plugins.base import BasePlugin
 from app.plugins.manifest import PluginManifest, PluginRouteDef

@@ -25,7 +27,7 @@ class KnowledgePlugin(BasePlugin):
        """Register event-driven extraction hooks on activation."""
        await super().on_activate(db, service_container, event_bus)
        try:
-            from app.core.hooks import register_action
+            from app.core.hooks import get_hook_registry
            from app.plugins.builtins.knowledge.services import extract_knowledge
            async def on_wiki_create(*args, **kwargs):
                article_id = kwargs.get("article_id") or kwargs.get("entity_id")
@@ -41,7 +43,9 @@ class KnowledgePlugin(BasePlugin):
                            source_type="wiki_article", source_id=uuid.UUID(str(article_id)),
                            source_title=title, source_text=content,
                        )
-            register_action("wiki.article.created", on_wiki_create, priority=20, owner_tag="knowledge")
+            get_hook_registry().register_action(
+                "wiki.article.created", on_wiki_create, priority=20, owner_tag="knowledge"
+            )
            # H-DATA-LIFE: Re-extract when wiki article is updated
            async def on_wiki_update(*args, **kwargs):
                article_id = kwargs.get("article_id") or kwargs.get("entity_id")
@@ -57,7 +61,9 @@ class KnowledgePlugin(BasePlugin):
                            source_type="wiki_article", source_id=uuid.UUID(str(article_id)),
                            source_title=title, source_text=content,
                        )
-            register_action("wiki.article.updated", on_wiki_update, priority=20, owner_tag="knowledge")
+            get_hook_registry().register_action(
+                "wiki.article.updated", on_wiki_update, priority=20, owner_tag="knowledge"
+            )
            logger.info("Registered knowledge extraction hooks")
        except Exception:
            logger.exception("Failed to register knowledge hooks")
@@ -74,8 +80,8 @@ class KnowledgePlugin(BasePlugin):

        async def _ask_knowledge_handler(arguments: dict[str, Any], context: dict[str, Any]) -> dict[str, Any]:
            """Ask a knowledge question."""
-            from app.plugins.builtins.knowledge.services import ask_knowledge
            from app.core.db import get_worker_session_factory
+            from app.plugins.builtins.knowledge.services import ask_knowledge
            question = arguments.get("question", "")
            tenant_id = context.get("tenant_id")
            if not question or not tenant_id:
@@ -103,8 +109,8 @@ class KnowledgePlugin(BasePlugin):

        async def _search_knowledge_handler(arguments: dict[str, Any], context: dict[str, Any]) -> dict[str, Any]:
            """Search wiki articles via unified search."""
-            from app.plugins.builtins.unified_search.provider_registry import get_search_registry
            from app.core.db import get_worker_session_factory
+            from app.plugins.builtins.unified_search.provider_registry import get_search_registry
            query = arguments.get("query", "")
            tenant_id = context.get("tenant_id")
            if not query or not tenant_id:
@@ -149,8 +155,8 @@ class KnowledgePlugin(BasePlugin):

    async def on_deactivate(self, db, service_container, event_bus) -> None:
        """Clean up on deactivation."""
-        from app.core.hooks import unregister_actions_by_owner
-        unregister_actions_by_owner("knowledge")
+        from app.core.hooks import get_hook_registry
+        get_hook_registry().unregister_all_for_plugin("knowledge")
        # Unregister knowledge agent tools from the core AI tool registry
        try:
            from app.ai.tool_registry import get_tool_registry
@@ -1,51 +1,70 @@
 """Knowledge plugin routes — extraction, ask, review queue."""
 from __future__ import annotations
+
 import uuid
+
 from fastapi import APIRouter, Depends, HTTPException, Query
+from pydantic import BaseModel, Field
 from sqlalchemy.ext.asyncio import AsyncSession
+
 from app.core.db import get_db
 from app.deps import require_permission
-from app.plugins.builtins.knowledge.services import extract_knowledge, ask_knowledge, get_review_queue, review_extraction
+from app.plugins.builtins.knowledge.services import (
+    ask_knowledge,
+    extract_knowledge,
+    get_review_queue,
+    review_extraction,
+)

 router = APIRouter(prefix="/api/v1/knowledge", tags=["knowledge"])

+
+class KnowledgeExtractRequest(BaseModel):
+    """Extract knowledge from a source."""
+
+    source_type: str = Field(..., min_length=1)
+    source_id: uuid.UUID
+    source_title: str | None = None
+    source_text: str = Field(..., min_length=1)
+
+
+class KnowledgeAskRequest(BaseModel):
+    """Ask a knowledge question."""
+
+    question: str = Field(..., min_length=1)
+
+
+class KnowledgeReviewRequest(BaseModel):
+    """Approve or reject a knowledge extraction."""
+
+    approved: bool = False
+    notes: str | None = None
+
+
@router.post("/extract")
 async def extract(
-    body: dict,
+    body: KnowledgeExtractRequest,
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(require_permission("wiki:read")),
 ):
    """Extract knowledge from a source (wiki article, dms file, mail, communication)."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
-    source_type = body.get("source_type", "")
-    source_id = body.get("source_id", "")
-    source_title = body.get("source_title")
-    source_text = body.get("source_text", "")
-    if not source_type or not source_id or not source_text:
-        raise HTTPException(400, detail={"detail": "source_type, source_id, source_text required", "code": "missing_fields"})
-    try:
-        sid = uuid.UUID(source_id)
-    except ValueError:
-        raise HTTPException(400, detail={"detail": "Invalid source_id", "code": "invalid_id"}) from None
    result = await extract_knowledge(
-        db=db, tenant_id=tenant_id, source_type=source_type, source_id=sid,
-        source_title=source_title, source_text=source_text,
+        db=db, tenant_id=tenant_id, source_type=body.source_type, source_id=body.source_id,
+        source_title=body.source_title, source_text=body.source_text,
        user_id=uuid.UUID(current_user["user_id"]) if current_user.get("user_id") else None,
    )
    return result

@router.post("/ask")
 async def ask(
-    body: dict,
+    body: KnowledgeAskRequest,
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(require_permission("wiki:read")),
 ):
    """Ask a knowledge question — uses wiki + graph_rag as context."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
-    question = body.get("question") or body.get("query", "")
-    if not question:
-        raise HTTPException(400, detail={"detail": "question required", "code": "missing_question"})
-    result = await ask_knowledge(db=db, tenant_id=tenant_id, question=question)
+    result = await ask_knowledge(db=db, tenant_id=tenant_id, question=body.question)
    return result

@router.get("/review")
@@ -62,22 +81,20 @@ async def review_queue(
@router.post("/review/{extraction_id}")
 async def review(
    extraction_id: str,
-    body: dict,
+    body: KnowledgeReviewRequest,
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(require_permission("wiki:write")),
 ):
    """Approve or reject a knowledge extraction."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
-    approved = body.get("approved", False)
-    notes = body.get("notes")
    try:
        eid = uuid.UUID(extraction_id)
    except ValueError:
        raise HTTPException(400, detail={"detail": "Invalid extraction_id", "code": "invalid_id"}) from None
    result = await review_extraction(
-        db=db, tenant_id=tenant_id, extraction_id=eid, approved=approved,
+        db=db, tenant_id=tenant_id, extraction_id=eid, approved=body.approved,
        user_id=uuid.UUID(current_user["user_id"]) if current_user.get("user_id") else None,
-        notes=notes,
+        notes=body.notes,
    )
    if "error" in result:
        raise HTTPException(404, detail={"detail": result["error"], "code": "not_found"})
@@ -1,10 +1,13 @@
 """Knowledge extraction services — LLM-based entity/relationship extraction."""
 from __future__ import annotations
+
 import logging
 import uuid
 from typing import Any
-from sqlalchemy import select, update
+
+from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
+
 from app.ai.llm_client import llm_complete
 from app.plugins.builtins.knowledge.models import KnowledgeExtraction

@@ -0,0 +1,7 @@
+-- Dual-path convergence (Gate B): add columns that Alembic migrations
+-- 0120 (is_system) and 0140 (folder_id) add on the core path. Idempotent
+-- so both install paths converge to the identical schema.
+ALTER TABLE comm_conversations ADD COLUMN IF NOT EXISTS is_system BOOLEAN NOT NULL DEFAULT FALSE;
+CREATE INDEX IF NOT EXISTS ix_comm_conversations_tenant_system ON comm_conversations(tenant_id, is_system);
+ALTER TABLE comm_conversations ADD COLUMN IF NOT EXISTS folder_id UUID;
+CREATE INDEX IF NOT EXISTS ix_comm_conversations_folder ON comm_conversations(folder_id);
@@ -39,7 +39,7 @@ class KommunikationPlugin(BasePlugin):
            "participant.left",
            "reaction.added",
        ],
-        migrations=["0001_initial.sql"],
+        migrations=["0001_initial.sql", "0002_system_channel_folders.sql"],
        permissions=[
            "comm:read",
            "comm:write",
@@ -50,10 +50,10 @@ class KommunikationPlugin(BasePlugin):
        ],
        is_core=True,
        menu_items=[
-            FrontendMenuItem(label_key='nav.communication', label='Kommunikation', path='/communication', icon='MessageSquare', order=80),
+            FrontendMenuItem(label_key='nav.communication', label='Kommunikation', path='/communication', icon='MessageSquare', order=80, permission='comm:read'),
        ],
        page_routes=[
-            FrontendPageRoute(path='/communication', component='@/pages/Communication', protected=True),
+            FrontendPageRoute(path='/communication', component='@/pages/Communication', protected=True, permission='comm:read'),
        ],
        author="LeoCRM Team",
        min_app_version="1.0.0",
@@ -136,6 +136,13 @@ class KommunikationPlugin(BasePlugin):
        from app.plugins.builtins.contracts import get_contract_registry
        get_contract_registry().unregister(self.manifest.name)

+        # Remove services registered in on_activate BEFORE super() so that
+        # event handlers being unsubscribed can no longer reach them (ARCH-033).
+        for service_name in ("comm_websocket", "comm_miniapps"):
+            if service_container.has(service_name):
+                service_container.remove(service_name)
+                logger.info("Removed '%s' from service container", service_name)
+
        await super().on_deactivate(db, service_container, event_bus)
        logger.info("Kommunikation plugin deactivated")

@@ -0,0 +1,115 @@
+"""Mail Account Service for the Mail plugin.
+
+Extracted from services.py as part of the God-object split (BUG-018 pilot).
+Re-exported by ``app.plugins.builtins.mail.services``.
+"""
+
+from __future__ import annotations
+
+import logging
+import uuid
+
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.plugins.builtins.mail.crypto import encrypt_password, generate_salt
+from app.plugins.builtins.mail.models import (
+    MailAccount,
+    MailFolder,
+)
+
+logger = logging.getLogger(__name__)
+
+
+async def create_mail_account(
+    db: AsyncSession, *, tenant_id: uuid.UUID, user_id: uuid.UUID, data: dict
+) -> MailAccount:
+    """Create a new mail account with encrypted password."""
+    salt = generate_salt()
+    account = MailAccount(
+        tenant_id=tenant_id,
+        user_id=user_id,
+        owner_id=user_id,
+        email_address=data["email_address"],
+        display_name=data.get("display_name", ""),
+        imap_host=data["imap_host"],
+        imap_port=data.get("imap_port", 993),
+        imap_ssl=data.get("imap_ssl", True),
+        smtp_host=data["smtp_host"],
+        smtp_port=data.get("smtp_port", 587),
+        smtp_tls=data.get("smtp_tls", True),
+        username=data.get("username") or data["email_address"],
+        encrypted_password=encrypt_password(data["password"], salt),
+        password_salt=salt,
+        is_shared=data.get("is_shared", False),
+        is_active=True,
+        sent_folder_imap_name=data.get("sent_folder_imap_name"),
+        drafts_folder_imap_name=data.get("drafts_folder_imap_name"),
+        spam_folder_imap_name=data.get("spam_folder_imap_name"),
+        trash_folder_imap_name=data.get("trash_folder_imap_name"),
+    )
+    db.add(account)
+    await db.flush()
+
+    # Create INBOX first so subfolders can reference it as parent
+    inbox_folder = MailFolder(
+        tenant_id=tenant_id,
+        account_id=account.id,
+        name="Posteingang",
+        imap_name="INBOX",
+        is_standard=True,
+    )
+    db.add(inbox_folder)
+    await db.flush()
+
+    # Create standard subfolders under INBOX (IMAP server uses '.' delimiter)
+    for fname, imap_name in [
+        ("Gesendet", "INBOX.Sent"),
+        ("Entwürfe", "INBOX.Drafts"),
+        ("Papierkorb", "INBOX.Trash"),
+        ("Spam", "INBOX.spam"),
+    ]:
+        folder = MailFolder(
+            tenant_id=tenant_id,
+            account_id=account.id,
+            name=fname,
+            imap_name=imap_name,
+            parent_id=inbox_folder.id,
+            is_standard=True,
+        )
+        db.add(folder)
+    await db.flush()
+    return account
+
+
+async def update_mail_account(db: AsyncSession, account: MailAccount, data: dict) -> MailAccount:
+    """Update a mail account, encrypting password if changed."""
+    field_map = {
+        "email": "email_address",
+        "email_address": "email_address",
+        "display_name": "display_name",
+        "imap_host": "imap_host",
+        "imap_port": "imap_port",
+        "imap_ssl": "imap_ssl",
+        "smtp_host": "smtp_host",
+        "smtp_port": "smtp_port",
+        "smtp_tls": "smtp_tls",
+        "username": "username",
+        "is_shared": "is_shared",
+        "is_active": "is_active",
+        "sent_folder_imap_name": "sent_folder_imap_name",
+        "drafts_folder_imap_name": "drafts_folder_imap_name",
+        "spam_folder_imap_name": "spam_folder_imap_name",
+        "trash_folder_imap_name": "trash_folder_imap_name",
+    }
+    for api_field, model_field in field_map.items():
+        if api_field in data and data[api_field] is not None:
+            setattr(account, model_field, data[api_field])
+    if "password" in data and data["password"] is not None:
+        new_salt = generate_salt()
+        account.password_salt = new_salt
+        account.encrypted_password = encrypt_password(data["password"], new_salt)
+    await db.flush()
+    await db.refresh(account)
+    return account
+
+
@@ -0,0 +1,117 @@
+"""Attachment storage helpers for the Mail plugin.
+
+Extracted from services.py as part of the God-object split (BUG-018 pilot).
+Re-exported by ``app.plugins.builtins.mail.services``.
+"""
+
+from __future__ import annotations
+
+import os
+import re
+import uuid
+
+import aiofiles
+
+from app.config import settings
+from app.plugins.builtins.mail.models import MailAttachment
+
+# ─── Attachment Storage Helpers ───
+
+MAX_ATTACHMENT_SIZE = 25 * 1024 * 1024  # 25 MB
+
+
+def _decode_mime_filename(filename: str) -> str:
+    """Decode MIME-encoded filename, handling =?charset?Q?...?= and =?charset?B?...?= patterns."""
+    if not filename:
+        return "attachment"
+    # If no MIME encoding pattern, return as-is
+    if "=?" not in filename:
+        return filename
+    try:
+        from email.header import decode_header, make_header
+
+        return str(make_header(decode_header(filename)))
+    except Exception:
+        # Fallback: manually decode Q-encoding if decode_header fails
+        # This handles cases where the email parser partially processed the filename
+        try:
+            import base64
+
+            def decode_q(match):
+                charset, encoding, encoded = (
+                    match.group(1),
+                    match.group(2).upper(),
+                    match.group(3),
+                )
+                if encoding == "B":
+                    decoded = base64.b64decode(encoded).decode(
+                        charset or "utf-8", errors="replace"
+                    )
+                else:  # Q encoding
+                    decoded = encoded.replace("_", " ")
+                    decoded = re.sub(
+                        r"=([0-9A-Fa-f]{2})",
+                        lambda m: chr(int(m.group(1), 16)),
+                        decoded,
+                    )
+                    decoded = decoded.encode("latin-1").decode(
+                        charset or "utf-8", errors="replace"
+                    )
+                return decoded
+
+            return re.sub(r"=\?([^?]+)\?([BbQq])\?([^?]*)\?=", decode_q, filename)
+        except Exception:
+            return filename
+
+
+def _sanitize_filename(filename: str) -> str:
+    """Sanitize a filename to prevent path traversal attacks."""
+    # Remove any path components — keep only the basename
+    filename = os.path.basename(filename or "attachment")
+    # Replace potentially dangerous characters
+    filename = re.sub(r"[^a-zA-Z0-9._-]", "_", filename)
+    # Ensure non-empty
+    if not filename:
+        filename = "attachment"
+    # Limit length
+    if len(filename) > 200:
+        name, ext = os.path.splitext(filename)
+        filename = name[:200 - len(ext)] + ext
+    return filename
+
+
+def _attachment_storage_path(mail_id: uuid.UUID, filename: str) -> str:
+    """Build the on-disk storage path for a mail attachment."""
+    safe_name = _sanitize_filename(filename)
+    return os.path.join(
+        settings.storage_path,
+        "mail_attachments",
+        str(mail_id),
+        safe_name,
+    )
+
+
+async def _save_attachment_to_storage(
+    mail_id: uuid.UUID, filename: str, content: bytes
+) -> str:
+    """Save attachment content to disk and return the storage path."""
+    storage_path = _attachment_storage_path(mail_id, filename)
+    os.makedirs(os.path.dirname(storage_path), exist_ok=True)
+    async with aiofiles.open(storage_path, "wb") as f:
+        await f.write(content)
+    return storage_path
+
+
+def attachment_to_response(att: MailAttachment) -> dict:
+    """Convert a MailAttachment ORM object to a response dict."""
+    return {
+        "id": str(att.id),
+        "mail_id": str(att.mail_id),
+        "filename": att.filename,
+        "mime_type": att.mime_type,
+        "size_bytes": att.size_bytes,
+        "size": att.size_bytes,  # alias for frontend compatibility
+        "content_id": att.content_id,
+        "is_inline": bool(att.content_id),
+        "dms_file_id": str(att.dms_file_id) if att.dms_file_id else None,
+    }
@@ -0,0 +1,74 @@
+"""AES-256 password encryption for Mail accounts (Fernet-based).
+
+Extracted from services.py as part of the God-object split (BUG-018 pilot).
+Re-exported by ``app.plugins.builtins.mail.services`` for backwards
+compatibility.
+
+⚠️ The legacy salt and MAIL_ENCRYPTION_KEY env guard are load-bearing:
+changing them makes existing encrypted passwords unreadable.
+"""
+
+from __future__ import annotations
+
+import base64
+import os
+
+from cryptography.fernet import Fernet
+from cryptography.hazmat.primitives import hashes
+from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
+
+MAIL_ENCRYPTION_KEY = os.environ.get("MAIL_ENCRYPTION_KEY")
+if not MAIL_ENCRYPTION_KEY:
+    raise RuntimeError(
+        "MAIL_ENCRYPTION_KEY environment variable is required. "
+        "Set it to a strong random value."
+    )
+
+# Legacy salt for backward compatibility with existing encrypted passwords
+_LEGACY_SALT = b"leocrm-mail-salt"
+
+
+def _derive_key(password: str, salt: bytes) -> bytes:
+    """Derive a 32-byte Fernet key from a password using PBKDF2 with the given salt."""
+    kdf = PBKDF2HMAC(
+        algorithm=hashes.SHA256(),
+        length=32,
+        salt=salt,
+        iterations=480000,
+    )
+    return base64.urlsafe_b64encode(kdf.derive(password.encode()))
+
+
+def generate_salt() -> str:
+    """Generate a random 32-byte salt and return as base64 string."""
+    salt = os.urandom(32)
+    return base64.urlsafe_b64encode(salt).decode()
+
+
+def _get_fernet(salt_b64: str | None = None) -> Fernet:
+    """Get a Fernet instance. If salt_b64 is provided, use it; otherwise use legacy salt."""
+    if salt_b64:
+        salt = base64.urlsafe_b64decode(salt_b64.encode())
+    else:
+        salt = _LEGACY_SALT
+    return Fernet(_derive_key(MAIL_ENCRYPTION_KEY, salt))
+
+
+def encrypt_password(plaintext: str, salt_b64: str | None = None) -> str:
+    """Encrypt a password using AES-256 (Fernet). Returns base64 ciphertext.
+
+    If salt_b64 is provided, uses that salt for key derivation.
+    If not, uses the legacy hardcoded salt (for backward compatibility).
+    """
+    fernet = _get_fernet(salt_b64)
+    return fernet.encrypt(plaintext.encode()).decode()
+
+
+def decrypt_password(ciphertext: str, salt_b64: str | None = None) -> str:
+    """Decrypt a password encrypted with encrypt_password.
+
+    If salt_b64 is provided, uses that salt for key derivation.
+    If not, uses the legacy hardcoded salt (for backward compatibility).
+    """
+    fernet = _get_fernet(salt_b64)
+    return fernet.decrypt(ciphertext.encode()).decode()
@@ -0,0 +1,546 @@
+"""Draft save/update and auto-sync for the Mail plugin.
+
+Extracted from services.py as part of the God-object split (BUG-018 pilot).
+Re-exported by ``app.plugins.builtins.mail.services``.
+"""
+
+from __future__ import annotations
+
+import logging
+import uuid
+from datetime import UTC, datetime
+from email.message import EmailMessage
+from email.utils import formataddr, formatdate, make_msgid
+
+import aioimaplib
+from sqlalchemy import and_, select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.notifications import create_notification
+from app.plugins.builtins.mail.imap_ops import imap_delete_mail, imap_move_mail
+from app.plugins.builtins.mail.imap_sync import (
+    get_account_password,
+    imap_sync_account,
+)
+from app.plugins.builtins.mail.models import (
+    Mail,
+    MailAccount,
+    MailFolder,
+)
+
+logger = logging.getLogger(__name__)
+
+
+async def save_draft(
+    db: AsyncSession,
+    account_id: uuid.UUID,
+    tenant_id: uuid.UUID,
+    user_id: uuid.UUID,
+    data: dict,
+) -> Mail:
+    """Save a new draft mail to DB and IMAP Drafts folder."""
+    import logging
+
+    logger = logging.getLogger(__name__)
+
+    # 1. Find the Drafts folder (imap_name contains 'Drafts')
+    account = (
+        await db.execute(
+            select(MailAccount).where(
+                and_(MailAccount.id == account_id, MailAccount.tenant_id == tenant_id)
+            )
+        )
+    ).scalar_one_or_none()
+    if not account:
+        raise ValueError("Account not found")
+
+    folders = (
+        await db.execute(
+            select(MailFolder).where(
+                and_(MailFolder.account_id == account_id, MailFolder.tenant_id == tenant_id)
+            )
+        )
+    ).scalars().all()
+
+    drafts_folder = None
+    for f in folders:
+        if 'draft' in f.imap_name.lower():
+            drafts_folder = f
+            break
+
+    if not drafts_folder:
+        raise ValueError("No Drafts folder found for this account")
+
+    # 2. Create Mail record
+    to_str = ', '.join(data.get('to', []))
+    cc_str = ', '.join(data.get('cc', []))
+    bcc_str = ', '.join(data.get('bcc', []))
+    subject = data.get('subject', '')
+    body_text = data.get('body_text', '')
+    body_html = data.get('body_html', '')
+
+    msg_id = make_msgid()
+    now = datetime.now(UTC)
+
+    mail = Mail(
+        tenant_id=tenant_id,
+        account_id=account_id,
+        folder_id=drafts_folder.id,
+        message_id=msg_id,
+        thread_id=msg_id,
+        subject=subject,
+        from_address=account.email_address,
+        to_addresses=to_str,
+        cc_addresses=cc_str,
+        bcc_addresses=bcc_str,
+        body_text=body_text,
+        body_html=body_html,
+        body_html_sanitized=body_html,
+        is_seen=True,
+        is_flagged=False,
+        is_draft=True,
+        is_answered=False,
+        is_forwarded=False,
+        has_attachments=False,
+        size_bytes=len(body_text.encode('utf-8')),
+        received_at=now,
+        sent_at=None,
+    )
+    db.add(mail)
+    await db.flush()
+
+    # ── Notification: draft saved ──
+    try:
+        await create_notification(
+            db, tenant_id, user_id,
+            "mail_draft",
+            "Entwurf gespeichert",
+            subject or "Ohne Betreff",
+        )
+        await db.flush()
+    except Exception:
+        logger.debug("Ignored exception in mail service", exc_info=True)
+
+    # 3. Build RFC822 message and APPEND to IMAP Drafts folder
+    password = await get_account_password(account)
+    client = None
+    try:
+        client = aioimaplib.IMAP4_SSL(host=account.imap_host, port=account.imap_port)
+        await client.wait_hello_from_server()
+        await client.login(account.username, password)
+
+        # Build RFC822 message
+        email_msg = EmailMessage()
+        email_msg['From'] = formataddr((account.display_name, account.email_address))
+        if to_str:
+            email_msg['To'] = to_str
+        if cc_str:
+            email_msg['Cc'] = cc_str
+        email_msg['Subject'] = subject
+        email_msg['Date'] = formatdate(localtime=True)
+        email_msg['Message-ID'] = msg_id
+        email_msg.set_content(body_text if body_text else '')
+        if body_html:
+            email_msg.add_alternative(body_html, subtype='html')
+
+        rfc822_bytes = email_msg.as_bytes()
+
+        # APPEND to Drafts folder
+        append_resp = await client.append(
+            drafts_folder.imap_name,
+            r'(\\Draft)',
+            str(int(now.timestamp())),
+            rfc822_bytes,
+        )
+        if append_resp.result != 'OK':
+            logger.warning("save_draft: IMAP APPEND failed for drafts folder %s", drafts_folder.imap_name)
+        else:
+            logger.info("save_draft: appended draft %s to IMAP Drafts", mail.id)
+
+    except Exception as exc:
+        logger.warning("save_draft: IMAP append failed (non-critical): %s", exc)
+    finally:
+        if client is not None:
+            try:
+                await client.logout()
+            except Exception:
+                logger.debug("Ignored exception in mail service", exc_info=True)
+
+    return mail
+
+
+async def update_draft(
+    db: AsyncSession,
+    mail_id: uuid.UUID,
+    tenant_id: uuid.UUID,
+    data: dict,
+) -> Mail:
+    """Update an existing draft."""
+    import logging
+
+    logger = logging.getLogger(__name__)
+
+    mail = (
+        await db.execute(
+            select(Mail).where(
+                and_(Mail.id == mail_id, Mail.tenant_id == tenant_id)
+            )
+        )
+    ).scalar_one_or_none()
+    if not mail:
+        raise ValueError("Mail not found")
+    if not mail.is_draft:
+        raise ValueError("Mail is not a draft")
+
+    # 2. Update fields
+    to_str = ', '.join(data.get('to', []))
+    cc_str = ', '.join(data.get('cc', []))
+    bcc_str = ', '.join(data.get('bcc', []))
+    mail.to_addresses = to_str
+    mail.cc_addresses = cc_str
+    mail.bcc_addresses = bcc_str
+    mail.subject = data.get('subject', '')
+    mail.body_text = data.get('body_text', '')
+    mail.body_html = data.get('body_html', '')
+    mail.body_html_sanitized = data.get('body_html', '')
+    mail.size_bytes = len(mail.body_text.encode('utf-8'))
+    await db.flush()
+
+    # 3. Delete old IMAP copy and APPEND new one
+    folder = (
+        await db.execute(
+            select(MailFolder).where(
+                and_(MailFolder.id == mail.folder_id, MailFolder.tenant_id == tenant_id)
+            )
+        )
+    ).scalar_one_or_none()
+    if not folder:
+        return mail
+
+    account = (
+        await db.execute(
+            select(MailAccount).where(
+                and_(MailAccount.id == folder.account_id, MailAccount.tenant_id == tenant_id)
+            )
+        )
+    ).scalar_one_or_none()
+    if not account:
+        return mail
+
+    password = await get_account_password(account)
+    client = None
+    try:
+        client = aioimaplib.IMAP4_SSL(host=account.imap_host, port=account.imap_port)
+        await client.wait_hello_from_server()
+        await client.login(account.username, password)
+
+        # Delete old copy from IMAP
+        select_resp = await client.select(folder.imap_name)
+        if select_resp.result == 'OK' and mail.message_id:
+            search_resp = await client.uid_search(f'HEADER Message-ID "{mail.message_id}"')
+            uids_raw = search_resp[1][0] if search_resp[1] and search_resp[1][0] else b''
+            if isinstance(uids_raw, (bytes, bytearray)):
+                uids = uids_raw.split()
+            else:
+                uids = []
+            if uids:
+                uid_str = uids[0].decode() if isinstance(uids[0], bytes) else str(uids[0])
+                await client.uid('store', uid_str, r'+FLAGS (\\Deleted)')
+                await client.expunge()
+
+        # APPEND new copy
+        email_msg = EmailMessage()
+        email_msg['From'] = formataddr((account.display_name, account.email_address))
+        if to_str:
+            email_msg['To'] = to_str
+        if cc_str:
+            email_msg['Cc'] = cc_str
+        email_msg['Subject'] = mail.subject
+        email_msg['Date'] = formatdate(localtime=True)
+        email_msg['Message-ID'] = mail.message_id
+        email_msg.set_content(mail.body_text if mail.body_text else '')
+        if mail.body_html:
+            email_msg.add_alternative(mail.body_html, subtype='html')
+
+        rfc822_bytes = email_msg.as_bytes()
+        now = datetime.now(UTC)
+        append_resp = await client.append(
+            folder.imap_name,
+            r'(\\Draft)',
+            str(int(now.timestamp())),
+            rfc822_bytes,
+        )
+        if append_resp.result != 'OK':
+            logger.warning("update_draft: IMAP APPEND failed for drafts folder %s", folder.imap_name)
+        else:
+            logger.info("update_draft: appended updated draft %s to IMAP Drafts", mail.id)
+
+    except Exception as exc:
+        logger.warning("update_draft: IMAP sync failed (non-critical): %s", exc)
+    finally:
+        if client is not None:
+            try:
+                await client.logout()
+            except Exception:
+                logger.debug("Ignored exception in mail service", exc_info=True)
+
+    return mail
+
+
+# ─── IMAP Folder Create / Delete ───
+
+
+async def imap_create_folder(
+    db: AsyncSession, account_id: uuid.UUID, folder_name: str, tenant_id: uuid.UUID
+) -> None:
+    """Create folder on IMAP server.
+
+    Connects to IMAP, creates folder with CREATE command.
+    Non-critical: errors are logged, DB operation still succeeds.
+    """
+    import logging
+
+    logger = logging.getLogger(__name__)
+
+    account = (
+        await db.execute(
+            select(MailAccount).where(
+                and_(MailAccount.id == account_id, MailAccount.tenant_id == tenant_id)
+            )
+        )
+    ).scalar_one_or_none()
+    if not account:
+        logger.warning("imap_create_folder: account %s not found", account_id)
+        return
+
+    password = await get_account_password(account)
+    client = None
+
+    try:
+        client = aioimaplib.IMAP4_SSL(host=account.imap_host, port=account.imap_port)
+        await client.wait_hello_from_server()
+        await client.login(account.username, password)
+
+        resp = await client.create(folder_name)
+        if resp.result != "OK":
+            logger.warning(
+                "imap_create_folder: CREATE failed for %s: %s", folder_name, resp
+            )
+        else:
+            logger.info("imap_create_folder: created folder %s on IMAP", folder_name)
+            try:
+                await create_notification(
+                    db, account.tenant_id, account.user_id,
+                    "mail_folder",
+                    "Ordner erstellt",
+                    folder_name,
+                )
+                await db.flush()
+            except Exception:
+                logger.debug("Ignored exception in mail service", exc_info=True)
+
+    except Exception as exc:
+        logger.warning("imap_create_folder: failed (non-critical): %s", exc)
+    finally:
+        if client is not None:
+            try:
+                await client.logout()
+            except Exception:
+                logger.debug("Ignored exception in mail service", exc_info=True)
+
+
+async def imap_delete_folder(
+    db: AsyncSession, folder_id: uuid.UUID, tenant_id: uuid.UUID
+) -> None:
+    """Delete folder from IMAP server.
+
+    Connects to IMAP, deletes folder with DELETE command.
+    Non-critical: errors are logged, DB operation still succeeds.
+    """
+    import logging
+
+    logger = logging.getLogger(__name__)
+
+    folder = (
+        await db.execute(
+            select(MailFolder).where(
+                and_(MailFolder.id == folder_id, MailFolder.tenant_id == tenant_id)
+            )
+        )
+    ).scalar_one_or_none()
+    if not folder:
+        logger.warning("imap_delete_folder: folder %s not found", folder_id)
+        return
+
+    account = (
+        await db.execute(
+            select(MailAccount).where(
+                and_(
+                    MailAccount.id == folder.account_id,
+                    MailAccount.tenant_id == tenant_id,
+                )
+            )
+        )
+    ).scalar_one_or_none()
+    if not account:
+        logger.warning("imap_delete_folder: account not found for folder %s", folder_id)
+        return
+
+    password = await get_account_password(account)
+    client = None
+
+    try:
+        client = aioimaplib.IMAP4_SSL(host=account.imap_host, port=account.imap_port)
+        await client.wait_hello_from_server()
+        await client.login(account.username, password)
+
+        resp = await client.delete(folder.imap_name)
+        if resp.result != "OK":
+            logger.warning(
+                "imap_delete_folder: DELETE failed for %s: %s", folder.imap_name, resp
+            )
+        else:
+            logger.info("imap_delete_folder: deleted folder %s on IMAP", folder.imap_name)
+            try:
+                await create_notification(
+                    db, account.tenant_id, account.user_id,
+                    "mail_folder",
+                    "Ordner gelöscht",
+                    folder.imap_name,
+                )
+                await db.flush()
+            except Exception:
+                logger.debug("Ignored exception in mail service", exc_info=True)
+
+    except Exception as exc:
+        logger.warning("imap_delete_folder: failed (non-critical): %s", exc)
+    finally:
+        if client is not None:
+            try:
+                await client.logout()
+            except Exception:
+                logger.debug("Ignored exception in mail service", exc_info=True)
+
+
+# ─── Auto-Sync ───
+
+
+async def auto_sync_all_accounts() -> None:
+    """Auto-sync all active mail accounts.
+
+    Called periodically by the background scheduler.
+    Iterates all active mail accounts and syncs each one.
+    """
+    import logging
+
+    from app.core.db import get_session_factory
+
+    logger = logging.getLogger(__name__)
+
+    factory = get_session_factory()
+    async with factory() as db:
+        accounts = (
+            await db.execute(
+                select(MailAccount).where(MailAccount.is_active.is_(True))
+            )
+        ).scalars().all()
+
+        if not accounts:
+            return
+
+        logger.info("auto_sync_all_accounts: syncing %d active account(s)", len(accounts))
+
+        for account in accounts:
+            try:
+                result = await imap_sync_account(db, account.id, account.tenant_id)
+                logger.info(
+                    "auto_sync_all_accounts: synced account %s (%s): %s",
+                    account.id,
+                    account.username,
+                    result,
+                )
+            except Exception as exc:
+                logger.warning(
+                    "auto_sync_all_accounts: failed for account %s: %s",
+                    account.id,
+                    exc,
+                )
+                try:
+                    await create_notification(
+                        db, account.tenant_id, account.user_id,
+                        "mail_sync_error",
+                        "Synchronisierung fehlgeschlagen",
+                        f"Account {account.email_address}: {exc}",
+                    )
+                except Exception:
+                    logger.debug("Ignored exception in mail service", exc_info=True)
+            # commit per-account so partial progress is saved
+            try:
+                await db.commit()
+            except Exception:
+                await db.rollback()
+
+
+async def process_sync_queue(db: AsyncSession) -> None:
+    """Process pending IMAP operations from the sync queue.
+
+    Called at the start of each auto-sync loop iteration.
+    Retries failed delete/move operations.
+    """
+    import logging
+
+    logger = logging.getLogger(__name__)
+
+    from app.plugins.builtins.mail.models import MailSyncQueue
+
+    pending = (
+        await db.execute(
+            select(MailSyncQueue).where(
+                and_(
+                    MailSyncQueue.status == "pending",
+                    MailSyncQueue.attempts < MailSyncQueue.max_attempts,
+                )
+            )
+        )
+    ).scalars().all()
+
+    if not pending:
+        return
+
+    logger.info("process_sync_queue: processing %d pending operation(s)", len(pending))
+
+    for entry in pending:
+        try:
+            if entry.operation == "delete":
+                is_permanent = entry.payload.get("permanent", False) if entry.payload else False
+                await imap_delete_mail(db, entry.mail_id, entry.tenant_id, permanent=is_permanent)
+            elif entry.operation == "move":
+                target_folder_id = uuid.UUID(entry.payload.get("target_folder_id", ""))
+                await imap_move_mail(db, entry.mail_id, target_folder_id, entry.tenant_id)
+            else:
+                logger.warning("process_sync_queue: unknown operation %s", entry.operation)
+                entry.status = "failed"
+                entry.last_error = f"Unknown operation: {entry.operation}"
+                continue
+
+            entry.status = "completed"
+            entry.updated_at = datetime.now(UTC)
+            logger.info("process_sync_queue: completed %s for mail %s", entry.operation, entry.mail_id)
+
+        except Exception as exc:
+            entry.attempts += 1
+            entry.last_error = str(exc)
+            entry.updated_at = datetime.now(UTC)
+            if entry.attempts >= entry.max_attempts:
+                entry.status = "failed"
+                logger.warning(
+                    "process_sync_queue: giving up on %s for mail %s after %d attempts: %s",
+                    entry.operation, entry.mail_id, entry.attempts, exc,
+                )
+            else:
+                logger.info(
+                    "process_sync_queue: retry %d/%d for %s mail %s: %s",
+                    entry.attempts, entry.max_attempts, entry.operation, entry.mail_id, exc,
+                )
+
+    await db.flush()
@@ -0,0 +1,452 @@
+"""IMAP operations (flags, delete, move, folders) for the Mail plugin.
+
+Extracted from services.py as part of the God-object split (BUG-018 pilot).
+Re-exported by ``app.plugins.builtins.mail.services``.
+"""
+
+from __future__ import annotations
+
+import logging
+import uuid
+
+import aioimaplib
+from sqlalchemy import and_, select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.plugins.builtins.mail.imap_sync import (
+    _parse_imap_list_response,
+    get_account_password,
+)
+from app.plugins.builtins.mail.models import (
+    Mail,
+    MailAccount,
+    MailFolder,
+)
+
+logger = logging.getLogger(__name__)
+
+
+async def imap_sync_mail_flags(
+    db: AsyncSession,
+    mail_id: uuid.UUID,
+    tenant_id: uuid.UUID,
+) -> None:
+    """Sync is_seen/is_flagged flags from DB to IMAP server.
+
+    Connects to the IMAP server, selects the mail's folder,
+    and uses UID STORE to set/remove \\Seen and \\Flagged flags.
+    Non-critical: logs warnings on failure but does not raise.
+    """
+    import logging
+
+    logger = logging.getLogger(__name__)
+
+    # Load the mail with its folder and account
+    mail = (
+        await db.execute(
+            select(Mail).where(
+                and_(Mail.id == mail_id, Mail.tenant_id == tenant_id)
+            )
+        )
+    ).scalar_one_or_none()
+    if not mail:
+        logger.warning("imap_sync_mail_flags: mail %s not found", mail_id)
+        return
+
+    folder = (
+        await db.execute(
+            select(MailFolder).where(
+                and_(MailFolder.id == mail.folder_id, MailFolder.tenant_id == tenant_id)
+            )
+        )
+    ).scalar_one_or_none()
+    if not folder:
+        logger.warning("imap_sync_mail_flags: folder %s not found for mail %s", mail.folder_id, mail_id)
+        return
+
+    account = (
+        await db.execute(
+            select(MailAccount).where(
+                and_(MailAccount.id == folder.account_id, MailAccount.tenant_id == tenant_id)
+            )
+        )
+    ).scalar_one_or_none()
+    if not account:
+        logger.warning("imap_sync_mail_flags: account not found for mail %s", mail_id)
+        return
+
+    if not mail.message_id:
+        logger.warning("imap_sync_mail_flags: mail %s has no message_id, cannot sync", mail_id)
+        return
+
+    password = await get_account_password(account)
+    client = None
+
+    try:
+        client = aioimaplib.IMAP4_SSL(host=account.imap_host, port=account.imap_port)
+        await client.wait_hello_from_server()
+        await client.login(account.username, password)
+
+        # Select the folder
+        select_resp = await client.select(folder.imap_name)
+        if select_resp.result != 'OK':
+            logger.warning("imap_sync_mail_flags: cannot select folder %s", folder.imap_name)
+            return
+
+        # Find the UID by searching for the Message-ID header
+        search_resp = await client.uid_search(f'HEADER Message-ID "{mail.message_id}"')
+        uids_raw = search_resp[1][0] if search_resp[1] and search_resp[1][0] else b''
+        if isinstance(uids_raw, (bytes, bytearray)):
+            uids = uids_raw.split()
+        else:
+            uids = []
+
+        if not uids:
+            logger.warning("imap_sync_mail_flags: no UID found for Message-ID %s", mail.message_id)
+            return
+
+        uid_str = uids[0].decode() if isinstance(uids[0], bytes) else str(uids[0])
+
+        # Sync \Seen flag
+        if mail.is_seen:
+            await client.uid('store', uid_str, '+FLAGS (\\Seen)')
+        else:
+            await client.uid('store', uid_str, '-FLAGS (\\Seen)')
+
+        # Sync \Flagged flag
+        if mail.is_flagged:
+            await client.uid('store', uid_str, '+FLAGS (\\Flagged)')
+        else:
+            await client.uid('store', uid_str, '-FLAGS (\\Flagged)')
+
+        logger.info("imap_sync_mail_flags: synced flags for mail %s (UID %s)", mail_id, uid_str)
+
+    except Exception as exc:
+        logger.warning("imap_sync_mail_flags: failed for mail %s: %s", mail_id, exc)
+    finally:
+        if client is not None:
+            try:
+                await client.logout()
+            except Exception:
+                logger.debug("Ignored exception in mail service", exc_info=True)
+
+
+# ─── IMAP Delete ───
+
+
+async def _find_trash_folder_name(
+    db: AsyncSession, account: MailAccount, tenant_id: uuid.UUID
+) -> str | None:
+    """Find the IMAP Trash folder name for an account.
+
+    Checks account.trash_folder_imap_name, then DB folders with 'trash' in imap_name,
+    then queries the IMAP server LIST for common Trash folder names.
+    """
+    # 1) Explicit mapping on account
+    if account.trash_folder_imap_name:
+        return account.trash_folder_imap_name
+
+    # 2) DB folder with 'trash' in imap_name
+    db_folders = (
+        await db.execute(
+            select(MailFolder).where(
+                and_(MailFolder.account_id == account.id, MailFolder.tenant_id == tenant_id)
+            )
+        )
+    ).scalars().all()
+    for f in db_folders:
+        if 'trash' in f.imap_name.lower():
+            return f.imap_name
+
+    # 3) Query IMAP server for common Trash folder names
+    password = await get_account_password(account)
+    client = None
+    try:
+        client = aioimaplib.IMAP4_SSL(host=account.imap_host, port=account.imap_port)
+        await client.wait_hello_from_server()
+        await client.login(account.username, password)
+        list_resp = await client.list('""', '"*"')
+        imap_folders, _ = _parse_imap_list_response(list_resp)
+        trash_candidates = ['Trash', 'INBOX.Trash', 'INBOX.Trash', 'Deleted', 'Deleted Items', 'Papierkorb']
+        for _, name in imap_folders:
+            if name in trash_candidates or 'trash' in name.lower():
+                return name
+    except Exception:
+        logger.debug("Ignored exception in mail service", exc_info=True)
+    finally:
+        if client:
+            try:
+                await client.logout()
+            except Exception:
+                logger.debug("Ignored exception in mail service", exc_info=True)
+
+    return None
+
+
+async def imap_delete_mail(
+    db: AsyncSession, mail_id: uuid.UUID, tenant_id: uuid.UUID, *, permanent: bool = False
+) -> None:
+    """Delete mail from IMAP server.
+
+    If permanent=False (default): MOVE mail to IMAP Trash folder (like real mail clients).
+    If permanent=True: STORE \\Deleted + EXPUNGE (permanent delete from server).
+    Uses UID MOVE if supported, otherwise COPY + STORE \\Deleted + EXPUNGE.
+    Raises exceptions on failure so caller can queue for retry.
+    """
+    import logging
+
+    logger = logging.getLogger(__name__)
+
+    mail = (
+        await db.execute(
+            select(Mail).where(
+                and_(Mail.id == mail_id, Mail.tenant_id == tenant_id)
+            )
+        )
+    ).scalar_one_or_none()
+    if not mail:
+        logger.warning("imap_delete_mail: mail %s not found", mail_id)
+        return
+
+    folder = (
+        await db.execute(
+            select(MailFolder).where(
+                and_(MailFolder.id == mail.folder_id, MailFolder.tenant_id == tenant_id)
+            )
+        )
+    ).scalar_one_or_none()
+    if not folder:
+        logger.warning("imap_delete_mail: folder %s not found for mail %s", mail.folder_id, mail_id)
+        return
+
+    account = (
+        await db.execute(
+            select(MailAccount).where(
+                and_(MailAccount.id == folder.account_id, MailAccount.tenant_id == tenant_id)
+            )
+        )
+    ).scalar_one_or_none()
+    if not account:
+        logger.warning("imap_delete_mail: account not found for mail %s", mail_id)
+        return
+
+    if not mail.imap_uid and not mail.message_id:
+        logger.warning("imap_delete_mail: mail %s has no imap_uid or message_id, cannot sync", mail_id)
+        return
+
+    # Lifecycle hook: mail.before_delete
+    from app.core.hooks import do_action
+    await do_action("mail.before_delete", mail_id=str(mail.id), tenant_id=str(tenant_id), permanent=permanent, db=db)
+
+    # Find Trash folder on IMAP server (only needed for non-permanent delete)
+    trash_folder_name = None
+    if not permanent:
+        trash_folder_name = await _find_trash_folder_name(db, account, tenant_id)
+        if not trash_folder_name:
+            logger.warning("imap_delete_mail: no Trash folder found for account %s, will permanent delete", account.id)
+
+    password = await get_account_password(account)
+    client = None
+
+    try:
+        client = aioimaplib.IMAP4_SSL(host=account.imap_host, port=account.imap_port)
+        await client.wait_hello_from_server()
+        await client.login(account.username, password)
+
+        select_resp = await client.select(folder.imap_name)
+        if select_resp.result != 'OK':
+            raise RuntimeError(f"cannot select folder {folder.imap_name}")
+
+        # Use stored imap_uid directly; fall back to Message-ID search
+        if mail.imap_uid:
+            uid_str = mail.imap_uid
+        else:
+            search_resp = await client.uid_search(f'HEADER Message-ID "{mail.message_id}"')
+            uids_raw = search_resp[1][0] if search_resp[1] and search_resp[1][0] else b''
+            if isinstance(uids_raw, (bytes, bytearray)):
+                uids = uids_raw.split()
+            else:
+                uids = []
+            if not uids:
+                raise RuntimeError(f"no UID found for Message-ID {mail.message_id}")
+            uid_str = uids[0].decode() if isinstance(uids[0], bytes) else str(uids[0])
+
+        if permanent or not trash_folder_name:
+            # Permanent delete: STORE \Deleted + EXPUNGE
+            await client.uid('store', uid_str, r'+FLAGS (\\Deleted)')
+            await client.expunge()
+            logger.info("imap_delete_mail: permanent deleted mail %s (UID %s)", mail_id, uid_str)
+            return
+
+        # Non-permanent: MOVE to Trash folder (like Thunderbird, Outlook, etc.)
+        # Don't move if already in Trash
+        if folder.imap_name.lower() == trash_folder_name.lower():
+            # Already in Trash — permanent delete
+            await client.uid('store', uid_str, r'+FLAGS (\\Deleted)')
+            await client.expunge()
+            logger.info("imap_delete_mail: permanent deleted mail %s (already in Trash, UID %s)", mail_id, uid_str)
+            return
+
+        # Try UID MOVE first
+        try:
+            move_resp = await client.uid('move', uid_str, trash_folder_name)
+            if move_resp.result == 'OK':
+                logger.info("imap_delete_mail: moved mail %s (UID %s) to Trash %s", mail_id, uid_str, trash_folder_name)
+                return
+        except Exception as move_exc:
+            logger.info("imap_delete_mail: UID MOVE not supported, falling back: %s", move_exc)
+
+        # Fallback: COPY to Trash + STORE \Deleted + EXPUNGE
+        copy_resp = await client.uid('copy', uid_str, trash_folder_name)
+        if copy_resp.result != 'OK':
+            raise RuntimeError(f"COPY to Trash failed for mail {mail_id}")
+        await client.uid('store', uid_str, r'+FLAGS (\\Deleted)')
+        await client.expunge()
+        logger.info("imap_delete_mail: moved mail %s (UID %s) to Trash via COPY+DELETE", mail_id, uid_str)
+
+        # Lifecycle hook: mail.after_delete
+        from app.core.hooks import do_action
+        await do_action("mail.after_delete", mail_id=str(mail.id), tenant_id=str(tenant_id), permanent=permanent, db=db)
+
+    except Exception as exc:
+        logger.warning("imap_delete_mail: failed for mail %s: %s", mail_id, exc)
+        raise
+    finally:
+        if client is not None:
+            try:
+                await client.logout()
+            except Exception:
+                logger.debug("Ignored exception in mail service", exc_info=True)
+
+
+# ─── IMAP Move ───
+
+
+async def imap_move_mail(
+    db: AsyncSession,
+    mail_id: uuid.UUID,
+    target_folder_id: uuid.UUID,
+    tenant_id: uuid.UUID,
+) -> None:
+    """Move mail to another folder on IMAP server.
+
+    Uses stored imap_uid directly; falls back to Message-ID search if missing.
+    Uses UID MOVE if supported, otherwise COPY + STORE \\Deleted + EXPUNGE.
+    Raises exceptions on failure so caller can queue for retry.
+    """
+    import logging
+
+    logger = logging.getLogger(__name__)
+
+    mail = (
+        await db.execute(
+            select(Mail).where(
+                and_(Mail.id == mail_id, Mail.tenant_id == tenant_id)
+            )
+        )
+    ).scalar_one_or_none()
+    if not mail:
+        logger.warning("imap_move_mail: mail %s not found", mail_id)
+        return
+
+    source_folder = (
+        await db.execute(
+            select(MailFolder).where(
+                and_(MailFolder.id == mail.folder_id, MailFolder.tenant_id == tenant_id)
+            )
+        )
+    ).scalar_one_or_none()
+    if not source_folder:
+        logger.warning("imap_move_mail: source folder not found for mail %s", mail_id)
+        return
+
+    target_folder = (
+        await db.execute(
+            select(MailFolder).where(
+                and_(MailFolder.id == target_folder_id, MailFolder.tenant_id == tenant_id)
+            )
+        )
+    ).scalar_one_or_none()
+    if not target_folder:
+        logger.warning("imap_move_mail: target folder %s not found", target_folder_id)
+        return
+
+    account = (
+        await db.execute(
+            select(MailAccount).where(
+                and_(MailAccount.id == source_folder.account_id, MailAccount.tenant_id == tenant_id)
+            )
+        )
+    ).scalar_one_or_none()
+    if not account:
+        logger.warning("imap_move_mail: account not found for mail %s", mail_id)
+        return
+
+    if not mail.imap_uid and not mail.message_id:
+        logger.warning("imap_move_mail: mail %s has no imap_uid or message_id, cannot sync", mail_id)
+        return
+
+    # Lifecycle hook: mail.before_move
+    from app.core.hooks import do_action
+    await do_action("mail.before_move", mail_id=str(mail.id), tenant_id=str(tenant_id), source_folder_id=str(source_folder.id), target_folder_id=str(target_folder.id), db=db)
+
+    password = await get_account_password(account)
+    client = None
+
+    try:
+        client = aioimaplib.IMAP4_SSL(host=account.imap_host, port=account.imap_port)
+        await client.wait_hello_from_server()
+        await client.login(account.username, password)
+
+        select_resp = await client.select(source_folder.imap_name)
+        if select_resp.result != 'OK':
+            raise RuntimeError(f"cannot select folder {source_folder.imap_name}")
+
+        # Use stored imap_uid directly; fall back to Message-ID search
+        if mail.imap_uid:
+            uid_str = mail.imap_uid
+        else:
+            search_resp = await client.uid_search(f'HEADER Message-ID "{mail.message_id}"')
+            uids_raw = search_resp[1][0] if search_resp[1] and search_resp[1][0] else b''
+            if isinstance(uids_raw, (bytes, bytearray)):
+                uids = uids_raw.split()
+            else:
+                uids = []
+            if not uids:
+                raise RuntimeError(f"no UID found for Message-ID {mail.message_id}")
+            uid_str = uids[0].decode() if isinstance(uids[0], bytes) else str(uids[0])
+
+        # Try UID MOVE first; fall back to COPY + STORE \\Deleted + EXPUNGE
+        try:
+            move_resp = await client.uid('move', uid_str, target_folder.imap_name)
+            if move_resp.result == 'OK':
+                logger.info("imap_move_mail: moved mail %s (UID %s) via UID MOVE", mail_id, uid_str)
+                return
+        except Exception as move_exc:
+            logger.info("imap_move_mail: UID MOVE not supported, falling back: %s", move_exc)
+
+        # Fallback: COPY + STORE \\Deleted + EXPUNGE
+        copy_resp = await client.uid('copy', uid_str, target_folder.imap_name)
+        if copy_resp.result != 'OK':
+            raise RuntimeError(f"COPY failed for mail {mail_id}")
+
+        await client.uid('store', uid_str, r'+FLAGS (\\Deleted)')
+        await client.expunge()
+
+        logger.info("imap_move_mail: moved mail %s (UID %s) via COPY+DELETE", mail_id, uid_str)
+
+        # Lifecycle hook: mail.after_move
+        from app.core.hooks import do_action
+        await do_action("mail.after_move", mail_id=str(mail.id), tenant_id=str(tenant_id), source_folder_id=str(source_folder.id), target_folder_id=str(target_folder.id), db=db)
+
+    except Exception as exc:
+        logger.warning("imap_move_mail: failed for mail %s: %s", mail_id, exc)
+        raise
+    finally:
+        if client is not None:
+            try:
+                await client.logout()
+            except Exception:
+                logger.debug("Ignored exception in mail service", exc_info=True)
+
+
@@ -4,7 +4,9 @@ from __future__ import annotations

 import uuid
 from datetime import UTC, datetime
+from typing import Any

+from pgvector.sqlalchemy import Vector
 from sqlalchemy import (
    JSON,
    Boolean,
@@ -16,14 +18,12 @@ from sqlalchemy import (
    Text,
    UniqueConstraint,
 )
+from sqlalchemy.dialects.postgresql import TSVECTOR
 from sqlalchemy.dialects.postgresql import UUID as PGUUID
 from sqlalchemy.orm import Mapped, mapped_column

 from app.core.db import Base, TenantMixin
 from app.models.owned_mixin import OwnedMixin
-from sqlalchemy.dialects.postgresql import TSVECTOR
-from pgvector.sqlalchemy import Vector
-from typing import Any

 # --- Mail Accounts (F-MAIL-14, F-MAIL-18) ---

@@ -0,0 +1,48 @@
+"""PGP encryption/decryption for the Mail plugin using pgpy.
+
+Extracted from services.py as part of the God-object split (BUG-018 pilot).
+Re-exported by ``app.plugins.builtins.mail.services``.
+"""
+
+from __future__ import annotations
+
+import pgpy
+
+
+def import_pgp_private_key(private_key_armored: str, passphrase: str = "") -> tuple[str, str]:
+    """Import a PGP private key. Returns (key_id, public_key_armored)."""
+    key, _ = pgpy.PGPKey.from_blob(private_key_armored)
+    if key.is_protected:
+        with key.unlock(passphrase):
+            pub_key = key.pubkey
+            key_id = str(key.fingerprint).upper()[-16:]
+            return key_id, str(pub_key)
+    pub_key = key.pubkey
+    key_id = str(key.fingerprint).upper()[-16:]
+    return key_id, str(pub_key)
+
+
+def import_pgp_public_key(public_key_armored: str) -> str:
+    """Import a PGP public key. Returns key_id."""
+    key, _ = pgpy.PGPKey.from_blob(public_key_armored)
+    return str(key.fingerprint).upper()[-16:]
+
+
+def pgp_encrypt_message(plaintext: str, recipient_public_key_armored: str) -> str:
+    """Encrypt a message with recipient's public PGP key."""
+    pub_key, _ = pgpy.PGPKey.from_blob(recipient_public_key_armored)
+    msg = pgpy.PGPMessage.new(plaintext)
+    encrypted = pub_key.encrypt(msg)
+    return str(encrypted)
+
+
+def pgp_decrypt_message(ciphertext: str, private_key_armored: str, passphrase: str = "") -> str:
+    """Decrypt a PGP-encrypted message."""
+    key, _ = pgpy.PGPKey.from_blob(private_key_armored)
+    enc_msg = pgpy.PGPMessage.from_blob(ciphertext)
+    if key.is_protected:
+        with key.unlock(passphrase):
+            decrypted = key.decrypt(enc_msg)
+            return decrypted.message.decode("utf-8")
+    decrypted = key.decrypt(enc_msg)
+    return decrypted.message.decode("utf-8")
@@ -9,7 +9,6 @@ from typing import Any

 from app.plugins.base import BasePlugin
 from app.plugins.manifest import (
-    FrontendDetailTab,
    FrontendMenuItem,
    FrontendPageRoute,
    FrontendSettingsPage,
@@ -115,7 +114,11 @@ async def _auto_sync_loop() -> None:
 class MailPlugin(BasePlugin):
    """Mail plugin for email management: IMAP sync, SMTP send, threading, rules, PGP."""

-    _auto_sync_task: asyncio.Task | None = None
+    def __init__(self) -> None:
+        super().__init__()
+        # Instance attribute: multiple plugin instances must not share the
+        # background task state (ARCH-036).
+        self._auto_sync_task: asyncio.Task | None = None

    manifest = PluginManifest(
        name="mail",
@@ -137,24 +140,30 @@ class MailPlugin(BasePlugin):
        migrations=["0001_initial.sql", "0006_flag_type.sql", "0007_sync_queue.sql", "0008_sync_queue_deleted_at.sql", "0009_remove_mail_soft_delete.sql", "0010_add_deleted_at.sql"],
        permissions=["mail:read", "mail:send", "mail:config", "mail:share", "mail:write", "mail:delete"],
        menu_items=[
-            FrontendMenuItem(label_key='nav.mail', label='E-Mail', path='/mail', icon='Mail', order=30),
+            FrontendMenuItem(label_key='nav.mail', label='E-Mail', path='/mail', icon='Mail', order=30, permission='mail:read'),
        ],
        page_routes=[
-            FrontendPageRoute(path='/mail', component='@/pages/Mail', protected=True),
-            FrontendPageRoute(path='/mail/settings', component='@/pages/MailSettings', protected=True),
+            FrontendPageRoute(path='/mail', component='@/pages/Mail', protected=True, permission='mail:read'),
+            FrontendPageRoute(path='/mail/settings', component='@/pages/MailSettings', protected=True, permission='mail:config'),
        ],
        settings_pages=[
            FrontendSettingsPage(path='mail', label_key='settings.mail', label='Mail', component='@/pages/MailSettings', icon='Mail', order=50),
        ],
-        detail_tabs=[
-            FrontendDetailTab(entity_type='contact', label_key='tabs.email', label='E-Mails', component='@/components/contact/ContactMailTab', icon='Mail', order=20, permission='mail:read'),
-        ],
+        # BUG (ghost component): ContactMailTab does not exist in the
+        # frontend — tab removed until implemented (Block I-D).
+        detail_tabs=[],
        author="LeoCRM Team",
        min_app_version="1.0.0",
        hooks=["mail.before_send", "mail.after_send"],
        contract_version="1.0.0",
    )

+    def get_entity_models(self) -> dict[str, type]:
+        """Entity types owned by Mail for the permission resolver."""
+        from app.plugins.builtins.mail.models import MailAccount
+
+        return {"mail_account": MailAccount}
+
    async def on_activate(
        self, db, service_container, event_bus
    ) -> None:
@@ -56,6 +56,7 @@ from app.plugins.builtins.mail.schemas import (
    MailRuleCreate,
    MailSendRequest,
    MailSignatureCreate,
+    MailSignatureUpdate,
    MailTemplateCreate,
    PgpKeyImport,
    SendPermissionCreate,
@@ -892,7 +893,10 @@ async def list_threads(
        threads[tid]["mail_count"] += 1
        threads[tid]["mails"].append(mail_to_response(mail))
    items = list(threads.values())
-    return {"items": items, "total": len(items)}
+    # Plain array — consistent with sibling mail list routes (accounts,
+    # folders, templates) and with the frontend client type
+    # fetchThreads(): Promise<ThreadResult[]>.
+    return items


 # ─── Templates (F-MAIL-06) ───
@@ -992,6 +996,66 @@ async def list_signatures(
    return [signature_to_response(s) for s in sigs]


+@router.patch("/signatures/{signature_id}")
+async def update_signature(
+    signature_id: str,
+    data: MailSignatureUpdate,
+    db: AsyncSession = Depends(get_db),
+    current_user: dict = Depends(require_permission("mail:config")),
+):
+    tenant_id = uuid.UUID(current_user["tenant_id"])
+    user_id = uuid.UUID(current_user["user_id"])
+    s_id = _parse_uuid(signature_id, "signature_id")
+    sig = (
+        await db.execute(
+            select(MailSignature).where(
+                and_(MailSignature.id == s_id, MailSignature.tenant_id == tenant_id)
+            )
+        )
+    ).scalar_one_or_none()
+    if not sig:
+        raise HTTPException(404, detail={"detail": "Signature not found", "code": "not_found"})
+    if sig.user_id != user_id:
+        raise HTTPException(403, detail={"detail": "Not your signature", "code": "forbidden"})
+    sig.name = data.name
+    sig.body_html = data.body_html
+    if data.is_default:
+        others = (
+            await db.execute(
+                select(MailSignature).where(MailSignature.user_id == user_id)
+            )
+        ).scalars().all()
+        for o in others:
+            o.is_default = False
+    sig.is_default = data.is_default
+    await db.flush()
+    return signature_to_response(sig)
+
+
+@router.delete("/signatures/{signature_id}", status_code=204)
+async def delete_signature(
+    signature_id: str,
+    db: AsyncSession = Depends(get_db),
+    current_user: dict = Depends(require_permission("mail:config")),
+):
+    tenant_id = uuid.UUID(current_user["tenant_id"])
+    user_id = uuid.UUID(current_user["user_id"])
+    s_id = _parse_uuid(signature_id, "signature_id")
+    sig = (
+        await db.execute(
+            select(MailSignature).where(
+                and_(MailSignature.id == s_id, MailSignature.tenant_id == tenant_id)
+            )
+        )
+    ).scalar_one_or_none()
+    if not sig:
+        raise HTTPException(404, detail={"detail": "Signature not found", "code": "not_found"})
+    if sig.user_id != user_id:
+        raise HTTPException(403, detail={"detail": "Not your signature", "code": "forbidden"})
+    await db.delete(sig)
+    await db.flush()
+
+
 # ─── Rules (F-MAIL-07) ───


@@ -1206,6 +1270,28 @@ async def list_labels(
    return [label_to_response(lbl) for lbl in labels]


+@router.delete("/labels/{label_id}", status_code=204)
+async def delete_label(
+    label_id: str,
+    db: AsyncSession = Depends(get_db),
+    current_user: dict = Depends(require_permission("mail:config")),
+):
+    tenant_id = uuid.UUID(current_user["tenant_id"])
+    user_id = uuid.UUID(current_user["user_id"])
+    l_id = _parse_uuid(label_id, "label_id")
+    label = (
+        await db.execute(
+            select(MailLabel).where(and_(MailLabel.id == l_id, MailLabel.tenant_id == tenant_id))
+        )
+    ).scalar_one_or_none()
+    if not label:
+        raise HTTPException(404, detail={"detail": "Label not found", "code": "not_found"})
+    if label.user_id != user_id:
+        raise HTTPException(403, detail={"detail": "Not your label", "code": "forbidden"})
+    await db.delete(label)
+    await db.flush()
+
+
 # ─── Contact PGP Keys (F-MAIL-12) ───


@@ -1494,8 +1580,8 @@ async def create_event_from_mail(
    try:
        from app.plugins.builtins.calendar.contracts import get_contract as get_calendar_contract
        _cal = get_calendar_contract()
-        calendar = _cal.calendar
-        calendar_entry = _cal.calendar_entry
+        calendar = _cal.Calendar
+        calendar_entry = _cal.CalendarEntry
    except ImportError:
        return {"created": False, "error": "calendar plugin not available"}
    cal_id = _parse_uuid(data.calendar_id, "calendar_id")
@@ -1862,4 +1948,3 @@ async def get_mail(
    )
    return mail_to_response(mail, attachments=list(attachments), labels=list(label_assignments))

-from app.core.audit import log_audit
@@ -0,0 +1,194 @@
+"""Rules, Templates & Vacation for the Mail plugin.
+
+Extracted from services.py as part of the God-object split (BUG-018 pilot).
+Re-exported by ``app.plugins.builtins.mail.services``.
+"""
+
+from __future__ import annotations
+
+import json
+import logging
+import uuid
+from datetime import UTC, datetime, timedelta
+
+from sqlalchemy import and_, or_, select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.plugins.builtins.mail.models import (
+    Mail,
+    MailFolder,
+    MailLabelAssignment,
+    MailRule,
+    VacationSentLog,
+)
+
+logger = logging.getLogger(__name__)
+
+
+def substitute_template_vars(template_body: str, variables: dict[str, str]) -> str:
+    """Replace {{placeholder}} variables in template body."""
+    result = template_body
+    for key, value in variables.items():
+        result = result.replace(f"{{{{{key}}}}}", value)
+        result = result.replace(f"{{{{{key.lower()}}}}}", value)
+        result = result.replace(f"{{{{{key.upper()}}}}}", value)
+    return result
+
+
+# ─── Mail Rule Engine (F-MAIL-07) ───
+
+
+def matches_condition(mail: Mail, conditions: dict) -> bool:
+    """Check if a mail matches all rule conditions."""
+    for field, expected in conditions.items():
+        if field == "from_contains":
+            if expected.lower() not in mail.from_address.lower():
+                return False
+        elif field == "subject_contains":
+            if expected.lower() not in mail.subject.lower():
+                return False
+        elif field == "to_contains":
+            if expected.lower() not in mail.to_addresses.lower():
+                return False
+        elif field == "body_contains":
+            body = (mail.body_text + mail.body_html).lower()
+            if expected.lower() not in body:
+                return False
+        elif field == "has_attachments":
+            if mail.has_attachments != bool(expected):
+                return False
+        elif field == "is_flagged":
+            if mail.is_flagged != bool(expected):
+                return False
+    return True
+
+
+async def execute_rule_actions(
+    db: AsyncSession, mail: Mail, actions: dict, tenant_id: uuid.UUID
+) -> dict:
+    """Execute rule actions on a matching mail."""
+    results = {}
+    for action, value in actions.items():
+        if action == "move_to_folder":
+            folder_id = uuid.UUID(value) if isinstance(value, str) else value
+            folder = (
+                await db.execute(
+                    select(MailFolder).where(
+                        and_(MailFolder.id == folder_id, MailFolder.tenant_id == tenant_id)
+                    )
+                )
+            ).scalar_one_or_none()
+            if folder:
+                mail.folder_id = folder.id
+                results["moved"] = str(folder.id)
+        elif action == "label":
+            label_id = uuid.UUID(value) if isinstance(value, str) else value
+            existing = (
+                await db.execute(
+                    select(MailLabelAssignment).where(
+                        and_(
+                            MailLabelAssignment.mail_id == mail.id,
+                            MailLabelAssignment.label_id == label_id,
+                        )
+                    )
+                )
+            ).scalar_one_or_none()
+            if not existing:
+                assignment = MailLabelAssignment(
+                    tenant_id=tenant_id,
+                    mail_id=mail.id,
+                    label_id=label_id,
+                )
+                db.add(assignment)
+                results["labeled"] = str(label_id)
+        elif action == "mark_seen":
+            mail.is_seen = bool(value)
+            results["seen"] = bool(value)
+        elif action == "mark_flagged":
+            mail.is_flagged = bool(value)
+            results["flagged"] = bool(value)
+        elif action == "forward_to":
+            results["forward_to"] = value
+    await db.flush()
+    return results
+
+
+async def apply_rules_to_mail(db: AsyncSession, mail: Mail, tenant_id: uuid.UUID) -> list[dict]:
+    """Find and apply all matching rules to a mail, sorted by priority."""
+    rules = (
+        (
+            await db.execute(
+                select(MailRule)
+                .where(
+                    and_(
+                        MailRule.tenant_id == tenant_id,
+                        MailRule.is_active,
+                        or_(
+                            MailRule.account_id == mail.account_id,
+                            MailRule.account_id.is_(None),
+                        ),
+                    )
+                )
+                .order_by(MailRule.priority)
+            )
+        )
+        .scalars()
+        .all()
+    )
+
+    applied = []
+    for rule in rules:
+        conditions = json.loads(rule.conditions) if rule.conditions else {}
+        actions = json.loads(rule.actions) if rule.actions else {}
+        if matches_condition(mail, conditions):
+            result = await execute_rule_actions(db, mail, actions, tenant_id)
+            applied.append({"rule_id": str(rule.id), "rule_name": rule.name, "actions": result})
+    return applied
+
+
+# ─── Vacation Auto-Reply (F-MAIL-08) ───
+
+
+VACATION_DEDUP_HOURS = 24
+
+
+async def should_send_vacation_reply(
+    db: AsyncSession,
+    account_id: uuid.UUID,
+    sender_address: str,
+    tenant_id: uuid.UUID,
+) -> bool:
+    """Check if vacation auto-reply should be sent (dedup within 24h)."""
+    cutoff = datetime.now(UTC) - timedelta(hours=VACATION_DEDUP_HOURS)
+    existing = (
+        await db.execute(
+            select(VacationSentLog).where(
+                and_(
+                    VacationSentLog.account_id == account_id,
+                    VacationSentLog.sender_address == sender_address,
+                    VacationSentLog.sent_at >= cutoff,
+                    VacationSentLog.tenant_id == tenant_id,
+                )
+            )
+        )
+    ).scalar_one_or_none()
+    return existing is None
+
+
+async def log_vacation_sent(
+    db: AsyncSession,
+    account_id: uuid.UUID,
+    sender_address: str,
+    tenant_id: uuid.UUID,
+) -> None:
+    """Log that a vacation auto-reply was sent to a sender."""
+    log = VacationSentLog(
+        tenant_id=tenant_id,
+        account_id=account_id,
+        sender_address=sender_address,
+        sent_at=datetime.now(UTC),
+    )
+    db.add(log)
+    await db.flush()
+
+
@@ -0,0 +1,62 @@
+"""HTML sanitization for the Mail plugin using nh3.
+
+Extracted from services.py as part of the God-object split (BUG-018 pilot).
+Re-exported by ``app.plugins.builtins.mail.services``.
+"""
+
+from __future__ import annotations
+
+import nh3
+
+
+def sanitize_html(raw_html: str) -> str:
+    """Sanitize HTML using nh3 — removes script tags and dangerous attributes."""
+    if not raw_html:
+        return ""
+    return nh3.clean(
+        raw_html,
+        tags={
+            "a",
+            "b",
+            "br",
+            "div",
+            "em",
+            "h1",
+            "h2",
+            "h3",
+            "h4",
+            "h5",
+            "h6",
+            "hr",
+            "i",
+            "img",
+            "li",
+            "ol",
+            "p",
+            "span",
+            "strong",
+            "table",
+            "tbody",
+            "td",
+            "th",
+            "thead",
+            "tr",
+            "u",
+            "ul",
+            "blockquote",
+            "code",
+            "pre",
+            "font",
+            "center",
+        },
+        attributes={
+            "a": {"href", "title", "target"},
+            "img": {"src", "alt", "width", "height"},
+            "span": {"style"},
+            "div": {"style"},
+            "font": {"color", "size", "face"},
+            "p": {"style"},
+            "td": {"style"},
+            "th": {"style"},
+        },
+    )
@@ -259,6 +259,12 @@ class MailSignatureResponse(BaseModel):
    is_default: bool


+class MailSignatureUpdate(BaseModel):
+    name: str = Field(..., min_length=1, max_length=255)
+    body_html: str = ""
+    is_default: bool = False
+
+
 # ─── Rules ───


@@ -0,0 +1,169 @@
+"""Response serializers for the Mail plugin ORM models.
+
+Extracted from services.py as part of the God-object split (BUG-018 pilot).
+Re-exported by ``app.plugins.builtins.mail.services``.
+
+account_to_response NEVER includes passwords — security-critical contract.
+"""
+
+from __future__ import annotations
+
+import json
+
+from app.plugins.builtins.mail.models import (
+    Mail,
+    MailAccount,
+    MailAttachment,
+    MailFolder,
+    MailLabel,
+    MailRule,
+    MailSignature,
+    MailTemplate,
+)
+from app.plugins.builtins.mail.text_utils import (
+    extract_email_addresses,  # noqa: F401 — re-exported for backwards compat
+)
+
+
+def attachment_to_response(att: MailAttachment) -> dict:
+    """Convert a MailAttachment ORM object to a response dict."""
+    return {
+        "id": str(att.id),
+        "mail_id": str(att.mail_id),
+        "filename": att.filename,
+        "mime_type": att.mime_type,
+        "size_bytes": att.size_bytes,
+        "size": att.size_bytes,  # alias for frontend compatibility
+        "content_id": att.content_id,
+        "is_inline": bool(att.content_id),
+        "dms_file_id": str(att.dms_file_id) if att.dms_file_id else None,
+    }
+
+
+def account_to_response(account: MailAccount) -> dict:
+    """Convert MailAccount to response dict, NEVER including password."""
+    return {
+        "id": str(account.id),
+        "email": account.email_address,
+        "email_address": account.email_address,
+        "display_name": account.display_name,
+        "imap_host": account.imap_host,
+        "imap_port": account.imap_port,
+        "imap_ssl": account.imap_ssl,
+        "smtp_host": account.smtp_host,
+        "smtp_port": account.smtp_port,
+        "smtp_tls": account.smtp_tls,
+        "username": account.username,
+        "is_shared": account.is_shared,
+        "is_active": account.is_active,
+        "sent_folder_imap_name": account.sent_folder_imap_name,
+        "drafts_folder_imap_name": account.drafts_folder_imap_name,
+        "spam_folder_imap_name": account.spam_folder_imap_name,
+        "trash_folder_imap_name": account.trash_folder_imap_name,
+        "created_at": account.created_at,
+        "updated_at": account.updated_at,
+    }
+
+
+def mail_to_response(
+    mail: Mail,
+    attachments: list[MailAttachment] | None = None,
+    labels: list[MailLabel] | None = None,
+) -> dict:
+    """Convert a Mail ORM object to a response dict."""
+    resp = {
+        "id": str(mail.id),
+        "account_id": str(mail.account_id),
+        "folder_id": str(mail.folder_id),
+        "message_id": mail.message_id,
+        "thread_id": mail.thread_id,
+        "in_reply_to": mail.in_reply_to,
+        "subject": mail.subject,
+        "from_address": mail.from_address,
+        "from_name": mail.from_address.split("<")[0].strip().strip('"') if "<" in mail.from_address else mail.from_address,
+        "to_addresses": extract_email_addresses(mail.to_addresses) if mail.to_addresses else [],
+        "cc_addresses": extract_email_addresses(mail.cc_addresses) if mail.cc_addresses else [],
+        "bcc_addresses": extract_email_addresses(mail.bcc_addresses) if mail.bcc_addresses else [],
+        "body_text": mail.body_text,
+        "body_html": mail.body_html if mail.body_html else None,
+        "body_html_sanitized": mail.body_html_sanitized,
+        "sanitized_html": mail.body_html_sanitized,
+        "date": mail.received_at.isoformat() if mail.received_at else (mail.sent_at.isoformat() if mail.sent_at else None),
+        "is_seen": mail.is_seen,
+        "is_flagged": mail.is_flagged,
+        "flag_type": getattr(mail, 'flag_type', None),
+        "is_draft": mail.is_draft,
+        "is_answered": mail.is_answered,
+        "is_forwarded": mail.is_forwarded,
+        "has_attachments": mail.has_attachments,
+        "size_bytes": mail.size_bytes,
+        "received_at": mail.received_at,
+        "sent_at": mail.sent_at,
+        "contact_id": str(mail.contact_id) if mail.contact_id else None,
+        "attachments": [],
+        "labels": [],
+    }
+    if attachments:
+        resp["attachments"] = [attachment_to_response(a) for a in attachments]
+    if labels:
+        resp["labels"] = [
+            {"id": str(lbl.id), "name": lbl.name, "color": lbl.color} for lbl in labels
+        ]
+    return resp
+
+
+def folder_to_response(folder: MailFolder) -> dict:
+    """Convert MailFolder to response dict."""
+    return {
+        "id": str(folder.id),
+        "account_id": str(folder.account_id),
+        "name": folder.name,
+        "imap_name": folder.imap_name,
+        "parent_id": str(folder.parent_id) if folder.parent_id else None,
+        "is_standard": folder.is_standard,
+        "unread_count": folder.unread_count,
+        "total_count": folder.total_count,
+    }
+
+
+def rule_to_response(rule: MailRule) -> dict:
+    """Convert MailRule to response dict."""
+    return {
+        "id": str(rule.id),
+        "name": rule.name,
+        "account_id": str(rule.account_id) if rule.account_id else None,
+        "priority": rule.priority,
+        "is_active": rule.is_active,
+        "conditions": json.loads(rule.conditions) if rule.conditions else {},
+        "actions": json.loads(rule.actions) if rule.actions else {},
+    }
+
+
+def template_to_response(template: MailTemplate) -> dict:
+    """Convert MailTemplate to response dict."""
+    return {
+        "id": str(template.id),
+        "name": template.name,
+        "subject": template.subject,
+        "body_html": template.body_html,
+    }
+
+
+def signature_to_response(sig: MailSignature) -> dict:
+    """Convert MailSignature to response dict."""
+    return {
+        "id": str(sig.id),
+        "name": sig.name,
+        "body_html": sig.body_html,
+        "account_id": str(sig.account_id) if sig.account_id else None,
+        "is_default": sig.is_default,
+    }
+
+
+def label_to_response(label: MailLabel) -> dict:
+    """Convert MailLabel to response dict."""
+    return {
+        "id": str(label.id),
+        "name": label.name,
+        "color": label.color,
+    }
--- a/Show More
+++ b/Show More