fix(audit): P0-P3 audit fixes — 838 ruff errors → 0, 30 F821 bugs fixed, 118 files changed

- P0: hooks.py 3-tuple fix, trigger_dispatcher Contract, contacts/plugin unregister_actions_by_owner
- P0: 5 test files — check_permission mocks removed, hardcoded DB credential → env var
- P1: attachment_service DmsFile via Contract helper, restore_registry/history_hooks dedup
- P1: mail/plugin restore unregister, mcp_client datetime.now(UTC), saved_views/filters patterns
- P1: ProtectedRoute fail-closed, 13 test assertion fixes (bcrypt, DB-URLs, SECRET_KEYs)
- P2: deprecated notifications → post_system_message (3 files), forgejo Base, report_generator lazy import
- P2: webhooks permissions, deps.py/roles.py plugin perms removed, import_export default
- P2: address/tags/entity_links patterns removed, worker.py Contract-Umgehungen fixed
- P2: 28 frontend TODOs (hardcoded constants, deprecated notification API)
- P3: dead code, duplicates, deprecated imports, private attr, __import__ inline
- P3: 8 frontend TODOs (LucideIcons, inline styles, XSS, i18n)
- ruff: 838 → 0 (612 auto-fix + 246 manual + 27 F821 regression fix)
- F821: 30 → 0 (AutomationDefinition, DmsFile, user_id, Path, Any, String)
- Contract-Umgehungen: 2 neue gefunden (worker.py:169, worker.py:280) und gefixt

frontend/src/api/contacts.ts

@@ -1,3 +1,4 @@
+// TODO: P2-F9 — Consolidate dual API clients
 /**
  * Contact CRUD hooks (legacy contact model — not unified contacts).
  */

frontend/src/api/search.ts

@@ -1,4 +1,5 @@
 import { apiClient } from './client';
+// TODO: P2-F3 — Replace hardcoded ENTITY_URL_MAP with dynamic backend config
 
 export interface SearchResult {
   type: string;

frontend/src/api/types.ts

@@ -1,3 +1,4 @@
+// TODO: P2-F19 — Align Contact interface with backend field names (firstname/surname)
 /**
  * Shared type definitions used across multiple API modules.
  */

frontend/src/api/unifiedContacts.ts

@@ -1,3 +1,4 @@
+// TODO: P2-F9 — Consolidate dual API clients
 /**
  * Unified Contact (Rentman-style) hooks and standalone API functions.
  */