T08a: Frontend DMS + Tags + Permissions UI — 33 tests, tsc clean, vite build pass

- DMS file browser: folder tree + file grid + upload dropzone + search + preview modal
- DMS share dialog: user/group share + public share links with password+expiry
- DMS bulk actions: bulk move + bulk delete with confirm dialogs
- DMS trash view: deleted files list with restore button
- Tags: TagPicker on company/contact detail pages (new tabs tab)
- Tags: TagCloud + BulkTagDialog for bulk tag assignment
- Permissions: share link creation, permission display, copy-link button
- API clients: dms.ts, tags.ts, permissions.ts
- Routes: /dms, /dms/trash added to router
- Sidebar: DMS nav link updated
- i18n: de.json + en.json translations for DMS/Tags/Permissions
- 33 new tests (5 test files), full regression 276/276 pass
- tsc --noEmit: 0 errors, vite build: 252 modules

.a0/worklog.md

@@ -144,3 +144,13 @@
 - ARIA spec: aria-sort value corrected to 'ascending'
 - **Results:** 112/112 tests pass, tsc clean, vite build successful
 - **Commit:** e28d11f
+
+## 2026-07-01 15:41 — T06: Mail Plugin Backend Complete
+- **Mail Plugin implementiert:** 8 neue Dateien, 4667 Zeilen
+- **14 Models:** mail_accounts, mail_folders, mails, attachments, labels, rules, templates, signatures, vacation_sent_log, seen_by, delegates, send_permissions, pgp_keys, contact_pgp_keys
+- **Features:** IMAP sync, SMTP send/reply/forward, threading, templates, rules, vacation (dedup), PGP, shared mailboxes, delegates, send permissions, HTML sanitization, FTS search, contact linking, calendar event creation
+- **Tests:** 46/46 pass, 74.56% coverage
+- **Regression:** 527/527 pass (0 failures)
+- **Ruff:** 0 errors, format clean
+- **Commit:** f646c59
+- **Risks:** Coverage 74.56% (target 80%), ILIKE fallback instead of tsvector, ARQ worker not wired