feat(F): F-PROACTIVE consolidate proactive AI — trigger_dispatcher dispatches agents on context/UI events

app/plugins/builtins/tasks/plugin.py

@@ -76,9 +76,18 @@ class TasksPlugin(BasePlugin):
         return {"task": Task}
 
     async def on_activate(self, db, service_container, event_bus) -> None:
-        """Activate plugin: register restore config + history hooks."""
+        """Activate plugin: register restore config + history hooks + AI tools."""
         await super().on_activate(db, service_container, event_bus)
 
+        # Register task AI tools (F-TASK-AGENT)
+        try:
+            from app.plugins.builtins.ai_assistant.contracts import get_tool_registry
+            from app.plugins.builtins.tasks.ai_tools import register_task_tools
+            register_task_tools(get_tool_registry())
+        except Exception:
+            import logging
+            logging.getLogger(__name__).exception("Failed to register task AI tools")
+
         # Register restore config for Task entities (P0-7 fix)
         from app.core.restore_registry import RestoreConfig, get_restore_registry
         from app.plugins.builtins.tasks.models import Task
@@ -101,7 +110,15 @@ class TasksPlugin(BasePlugin):
     async def on_deactivate(
         self, db, service_container, event_bus
     ) -> None:
-        """Deactivate plugin: unregister contract, restore, history, events."""
+        """Deactivate plugin: unregister contract, restore, history, events, AI tools."""
+        # Unregister task AI tools (F-TASK-AGENT)
+        try:
+            from app.plugins.builtins.ai_assistant.contracts import get_tool_registry
+            get_tool_registry().unregister_plugin("tasks")
+        except Exception:
+            import logging
+            logging.getLogger(__name__).exception("Failed to unregister task AI tools")
+
         # Contract abmelden
         from app.plugins.builtins.contracts import get_contract_registry
         get_contract_registry().unregister(self.manifest.name)