feat(5.22): Saved Searches / Smart Lists — reusable filters for list views

- SavedFilter model with TenantMixin (name, entity_type, filter_criteria JSONB, user_id)
- Routes: GET/POST /saved-filters, DELETE /saved-filters/{id} with RBAC
- Alembic migration 0029_saved_filters creates saved_filters table
- Frontend: SavedFilters.tsx component with save/load/delete UI
- Frontend: api/savedFilters.ts with React Query hooks
- Integrated into ContactsListPage as example
- i18n keys for savedFilters.* in de.json and en.json
- Tests: test_saved_filters.py (9 tests) + SavedFilters.test.tsx (3 tests)
- Registered SavedFilter in conftest.py

app/main.py

@@ -48,6 +48,7 @@ from app.routes import (
     system_settings,
     attachments,
     custom_fields,
+    saved_filters,
 )
 
 
@@ -306,6 +307,7 @@ def create_app() -> FastAPI:
     app.include_router(addresses.router)
     app.include_router(audit.router)
     app.include_router(custom_fields.router)
+    app.include_router(saved_filters.router)
 
     # ── Register plugin routes (before SPA catch-all) ──────────────────
     registry = get_registry()