fix: comprehensive system audit fixes (55+ issues)

CRITICAL:
- Fix SQL injection in prestart.sh (parameterized query)
- Fix secret key validation (always validate, not just production)
- Fix workspace model partial index bug (func.text -> text)
- Fix HealthResponse schema (add checks field)
- Fix Tenant import in permissions.py (NameError on every auth request)
- Fix README tech stack (React instead of Alpine.js)
- Delete broken test_cross_tenant_security_v2.py
- Add fail-closed RLS migration 0084 (48 tenant tables)

HIGH:
- Add GeneralRateLimitMiddleware for all API routes
- Add file type blocklist for DMS and attachment uploads
- Fix guest auth: Pydantic schema, tenant_slug required, CSRF bypass
- Fix CSRF bypass path matching (in -> endswith)
- Add worker healthcheck in docker-compose.yml
- Add ARQ max_tries=3 for job retries
- Fix 28 bare pass in mail services (-> logger.debug)
- Fix print() -> logger in main.py and ai_assistant
- Fix duplicate email handling (catch IntegrityError -> 409)
- Add session revocation (invalidate_all_user_sessions)
- Add resource limits to all containers
- Fix CORS default (localhost -> production domain)
- Fix SameSite=Lax -> Strict
- Fix Redis password visibility in healthcheck
- Fix npm vulnerabilities (19 -> 9)
- Fix Sidebar OOM (wildcard lucide import -> curated ICON_MAP)

MEDIUM:
- Localize ErrorBoundary to German
- Wire Mail.tsx save/delete filter to API
- Document system_notif plugin (no routes needed)
- Fix datetime.utcnow() -> datetime.now(UTC)
- Pin litellm version (>=1.0,<2.0)
- Move CSRF token from sessionStorage to in-memory
- Fix restore_backup error handling and transaction
- Fix Dms.tsx useEffect cleanup
- Add skip-to-content link for accessibility
- Add selectinload imports to 3 services
- Add .env.example missing variables
- Fix AppShell/TopBar/Sidebar test mocks

NEW TESTS:
- test_guest_auth.py (6 tests)
- test_user_service.py (8 tests)
- test_backup_service.py (5 tests)

NEW SCHEMAS:
- saved_filter, saved_view, user_preference, workspace, entity_policy

Tests: 22/22 PASSED

frontend/package.json

@@ -45,7 +45,8 @@
     "react-hook-form": "^7.53.0",
     "react-i18next": "^15.0.0",
     "react-markdown": "^10.1.0",
-    "react-router-dom": "^6.26.0",
+    "react-router": "^8.3.0",
+    "react-router-dom": "^7.18.2",
     "remark-gfm": "^4.0.1",
     "zod": "^3.23.8",
     "zustand": "^4.5.5"
@@ -58,16 +59,18 @@
     "@types/react": "^18.3.8",
     "@types/react-dom": "^18.3.0",
     "@vitejs/plugin-react": "^4.3.1",
-    "@vitest/coverage-v8": "^2.1.0",
+    "@vitest/coverage-v8": "^4.1.10",
     "autoprefixer": "^10.4.20",
+    "esbuild": "^0.28.1",
     "identity-obj-proxy": "^3.0.0",
     "jsdom": "^25.0.0",
     "postcss": "^8.4.47",
     "tailwindcss": "^3.4.13",
     "typescript": "^5.6.0",
-    "vite": "^5.4.0",
+    "vite": "^8.2.0",
     "vite-bundle-visualizer": "^1.2.1",
-    "vite-plugin-pwa": "^1.3.0",
-    "vitest": "^2.1.0"
+    "vite-plugin-pwa": "^1.2.0",
+    "vitest": "^4.1.10",
+    "workbox-build": "^7.4.1"
   }
 }