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/plugins/builtins/automation/agent_runner.py

@@ -16,8 +16,8 @@ from typing import Any
 
 from sqlalchemy import func, select
 
-from app.core.db import get_session_factory
 from app.ai.llm_client import llm_complete
+from app.core.db import get_session_factory
 
 logger = logging.getLogger(__name__)
 
@@ -161,15 +161,6 @@ async def run_agent(
     try:
         async def _run_llm() -> None:
             """Inner coroutine for LLM call with tool execution."""
-            from app.ai.llm_client import LLMClient
-
-            llm = LLMClient(
-                model=agent.model or None,
-                api_key=agent.api_key or None,
-                api_base=agent.api_base or None,
-                provider=agent.provider or None,
-            )
-
             # Build system prompt from agent configuration
             system_prompt = agent.system_prompt or "You are a helpful AI assistant."
             user_prompt = f"Context: {context_data}"
@@ -241,7 +232,7 @@ async def run_agent(
         # Run with timeout
         try:
             await asyncio.wait_for(_run_llm(), timeout=max_duration)
-        except asyncio.TimeoutError:
+        except TimeoutError:
             logger.warning(
                 "Agent %s execution timed out after %d seconds",
                 agent.id, max_duration,
@@ -295,6 +286,6 @@ async def run_agent(
 
 
 # Register all job functions with the job registry
-from app.core.job_registry import register_job
+from app.core.job_registry import register_job  # noqa: E402
 
-register_job("run_agent", run_agent)
+register_job("run_agent", run_agent)