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

app/routes/__init__.py

@@ -3,26 +3,26 @@
 from app.routes import (
     addresses,  # noqa: F401
     ai_copilot,  # noqa: F401
-    bank_accounts,  # noqa: F401
+    attachments,  # noqa: F401
     audit,  # noqa: F401
     auth,  # noqa: F401
+    bank_accounts,  # noqa: F401
     contacts,  # noqa: F401
+    currencies,  # noqa: F401
     dashboard,  # noqa: F401
     entity_history,  # noqa: F401
-    currencies,  # noqa: F401
-    taxes,  # noqa: F401
-    sequences,  # noqa: F401
-    system_settings,  # noqa: F401
-    attachments,  # noqa: F401
+    guests,  # noqa: F401  # ⚠️ Guest-System umgebaut — Guests sind jetzt reguläre User mit role=guest
     health,  # noqa: F401
     import_export,  # noqa: F401
     metrics,  # noqa: F401
     notifications,  # noqa: F401
     plugins,  # noqa: F401
     roles,  # noqa: F401
+    sequences,  # noqa: F401
+    system_settings,  # noqa: F401
+    taxes,  # noqa: F401
     tenants,  # noqa: F401
-    users,  # noqa: F401
     user_preferences,  # noqa: F401
+    users,  # noqa: F401
     workflows,  # noqa: F401
-    guests,  # noqa: F401  # ⚠️ Guest-System umgebaut — Guests sind jetzt reguläre User mit role=guest
 )