Feat: message manage (#12196)

### What problem does this PR solve?

Manage message and use in agent.

Issue #4213 

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

api/db/services/canvas_service.py

@@ -123,6 +123,19 @@ class UserCanvasService(CommonService):
             logging.exception(e)
             return False, None
 
+    @classmethod
+    @DB.connection_context()
+    def get_basic_info_by_canvas_ids(cls, canvas_id):
+        fields = [
+            cls.model.id,
+            cls.model.avatar,
+            cls.model.user_id,
+            cls.model.title,
+            cls.model.permission,
+            cls.model.canvas_category
+        ]
+        return cls.model.select(*fields).where(cls.model.id.in_(canvas_id)).dicts()
+
     @classmethod
     @DB.connection_context()
     def get_by_tenant_ids(cls, joined_tenant_ids, user_id,
@@ -198,7 +211,7 @@ async def completion(tenant_id, agent_id, session_id=None, **kwargs):
         if not isinstance(cvs.dsl, str):
             cvs.dsl = json.dumps(cvs.dsl, ensure_ascii=False)
         session_id=get_uuid()
-        canvas = Canvas(cvs.dsl, tenant_id, agent_id)
+        canvas = Canvas(cvs.dsl, tenant_id, agent_id, canvas_id=cvs.id)
         canvas.reset()
         conv = {
             "id": session_id,