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/contracts.py

@@ -5,7 +5,9 @@ Exposes models, services, scheduler, and agent communication for other plugins.
 
 from __future__ import annotations
 
-from app.plugins.builtins.contracts import get_contract_registry
+from app.plugins.builtins.automation.agent_comm import send_agent_message
+from app.plugins.builtins.automation.agent_runner import run_agent
+from app.plugins.builtins.automation.execution_engine import run_automation
 from app.plugins.builtins.automation.models import (
     AgentDefinition,
     AgentRun,
@@ -15,19 +17,17 @@ from app.plugins.builtins.automation.models import (
     AutomationRun,
     AutomationVersion,
 )
+from app.plugins.builtins.automation.scheduler import (
+    calculate_next_run,
+    scheduler_tick,
+)
 from app.plugins.builtins.automation.services import (
     AgentService,
     AutomationService,
     CronJobService,
     RunLogService,
 )
-from app.plugins.builtins.automation.agent_runner import run_agent
-from app.plugins.builtins.automation.execution_engine import run_automation
-from app.plugins.builtins.automation.scheduler import (
-    calculate_next_run,
-    scheduler_tick,
-)
-from app.plugins.builtins.automation.agent_comm import send_agent_message
+from app.plugins.builtins.contracts import get_contract_registry
 
 
 class AutomationContract:
@@ -73,8 +73,6 @@ get_contract_registry().register("automation", _contract)
 __all__ = [
     "AutomationContract",
     "AgentDefinition",
-    "Automation",
-    "CronJob",
     "AgentService",
     "AutomationService",
     "CronJobService",