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/api_tokens.py

@@ -3,8 +3,7 @@
 from __future__ import annotations
 
 import uuid
-from datetime import datetime, timedelta, timezone
-from typing import Any
+from datetime import UTC, datetime, timedelta
 
 from fastapi import APIRouter, Depends, HTTPException, status
 from pydantic import BaseModel
@@ -12,7 +11,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.core.api_token import create_api_token, list_api_tokens, revoke_api_token
 from app.core.db import get_db
-from app.deps import get_current_user, require_permission
+from app.deps import require_permission
 
 router = APIRouter(prefix="/api/v1/tokens", tags=["api-tokens"])
 
@@ -39,7 +38,7 @@ async def create_token(
 
     expires_at = None
     if body.expires_in_days is not None:
-        expires_at = datetime.now(timezone.utc) + timedelta(days=body.expires_in_days)
+        expires_at = datetime.now(UTC) + timedelta(days=body.expires_in_days)
 
     result = await create_api_token(
         db, tenant_id, user_id, body.name, body.scopes, expires_at,
@@ -71,7 +70,7 @@ async def revoke_token(
     try:
         tid = uuid.UUID(token_id)
     except ValueError:
-        raise HTTPException(400, detail={"detail": "Invalid token_id", "code": "invalid_id"})
+        raise HTTPException(400, detail={"detail": "Invalid token_id", "code": "invalid_id"}) from None
     revoked = await revoke_api_token(db, tenant_id, tid)
     if not revoked:
         raise HTTPException(404, detail={"detail": "Token not found or already revoked", "code": "not_found"})