feat(copilot): add user-aware LLM calls and project cleanup

- Modified `llm_call` and `generate_title` functions to accept `config` parameter, extracting `user_id` and `jwt_token` for per-user LLM configuration and API authentication
- Updated `create_base_model_with_tools` and `create_title_model` calls to pass user authentication details
- Added `jwt_token` to state for tool usage in GNS3 API calls
- Integrated chat router into controller API routes under `/chat` endpoint
- Implemented `_cleanup_copilot_agent` method in `Project` class to remove AgentService resources upon project closure, preventing resource leaks
- Enhanced error handling in agent cleanup to avoid interrupting project close operations

gns3server/controller/project.py

@@ -849,6 +849,9 @@ class Project:
         if not ignore_notification:
             self.emit_controller_notification("project.closed", self.asdict())
 
+        # Cleanup GNS3 Copilot AgentService for this project
+        await self._cleanup_copilot_agent()
+
         self.reset()
         self._closing = False
 
@@ -885,6 +888,23 @@ class Project:
         except OSError as e:
             log.warning(f"Could not delete unused pictures: {e}")
 
+    async def _cleanup_copilot_agent(self):
+        """
+        Cleanup GNS3 Copilot AgentService for this project.
+
+        This should be called when the project is closed to free resources.
+        """
+        try:
+            from gns3server.agent.gns3_copilot.project_agent_manager import get_project_agent_manager
+
+            agent_manager = await get_project_agent_manager()
+            if agent_manager.has_agent(self._id):
+                log.info(f"Cleaning up AgentService for project '{self.name}' ({self._id})")
+                await agent_manager.remove_agent(self._id)
+        except Exception as e:
+            # Don't fail project close if agent cleanup fails
+            log.warning(f"Failed to cleanup AgentService for project '{self.name}': {e}")
+
     async def delete(self):
 
         if self._status != "opened":