Fix: canvas sharing bug. (#9339)

### What problem does this PR solve?


### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

api/apps/canvas_app.py

 @login_required
 def rm():
     for i in request.json["canvas_ids"]:
-        if not UserCanvasService.query(user_id=current_user.id,id=i):
+        if not UserCanvasService.accessible(i, current_user.id):
             return get_json_result(
                 data=False, message='Only owner of canvas authorized for this operation.',
                 code=RetCode.OPERATING_ERROR)
         if not UserCanvasService.save(**req):
             return get_data_error_result(message="Fail to save canvas.")
     else:
-        if not UserCanvasService.query(user_id=current_user.id, id=req["id"]):
+        if not UserCanvasService.accessible(req["id"], current_user.id):
             return get_json_result(
                 data=False, message='Only owner of canvas authorized for this operation.',
                 code=RetCode.OPERATING_ERROR)
 @manager.route('/get/<canvas_id>', methods=['GET'])  # noqa: F821
 @login_required
 def get(canvas_id):
-    e, c = UserCanvasService.get_by_tenant_id(canvas_id)
-    tids = [t.tenant_id for t in UserTenantService.query(user_id=current_user.id)]
-    if not e or (c["user_id"] != current_user.id and c["user_id"]  not in tids):
+    if not UserCanvasService.accessible(canvas_id, current_user.id):
         return get_data_error_result(message="canvas not found.")
+    e, c = UserCanvasService.get_by_tenant_id(canvas_id)
     return get_json_result(data=c)
 
 
     files = req.get("files", [])
     inputs = req.get("inputs", {})
     user_id = req.get("user_id", current_user.id)
-    e, cvs = UserCanvasService.get_by_id(req["id"])
-    if not e:
-        return get_data_error_result(message="canvas not found.")
-    if not UserCanvasService.query(user_id=current_user.id, id=req["id"]):
+    if not UserCanvasService.accessible(req["id"], current_user.id):
         return get_json_result(
             data=False, message='Only owner of canvas authorized for this operation.',
             code=RetCode.OPERATING_ERROR)
 
+    e, cvs = UserCanvasService.get_by_id(req["id"])
+    if not e:
+        return get_data_error_result(message="canvas not found.")
+
     if not isinstance(cvs.dsl, str):
         cvs.dsl = json.dumps(cvs.dsl, ensure_ascii=False)
 
 @login_required
 def reset():
     req = request.json
+    if not UserCanvasService.accessible(req["id"], current_user.id):
+        return get_json_result(
+            data=False, message='Only owner of canvas authorized for this operation.',
+            code=RetCode.OPERATING_ERROR)
     try:
         e, user_canvas = UserCanvasService.get_by_id(req["id"])
         if not e:
             return get_data_error_result(message="canvas not found.")
-        if not UserCanvasService.query(user_id=current_user.id, id=req["id"]):
-            return get_json_result(
-                data=False, message='Only owner of canvas authorized for this operation.',
-                code=RetCode.OPERATING_ERROR)
 
         canvas = Canvas(json.dumps(user_canvas.dsl), current_user.id)
         canvas.reset()
 @login_required
 def debug():
     req = request.json
+    if not UserCanvasService.accessible(req["id"], current_user.id):
+        return get_json_result(
+            data=False, message='Only owner of canvas authorized for this operation.',
+            code=RetCode.OPERATING_ERROR)
     try:
         e, user_canvas = UserCanvasService.get_by_id(req["id"])
-        if not e:
-            return get_data_error_result(message="canvas not found.")
-        if not UserCanvasService.query(user_id=current_user.id, id=req["id"]):
-            return get_json_result(
-                data=False, message='Only owner of canvas authorized for this operation.',
-                code=RetCode.OPERATING_ERROR)
-
         canvas = Canvas(json.dumps(user_canvas.dsl), current_user.id)
         canvas.reset()
         canvas.message_id = get_uuid()
 def setting():
     req = request.json
     req["user_id"] = current_user.id
+
+    if not UserCanvasService.accessible(req["id"], current_user.id):
+        return get_json_result(
+            data=False, message='Only owner of canvas authorized for this operation.',
+            code=RetCode.OPERATING_ERROR)
+
     e,flow = UserCanvasService.get_by_id(req["id"])
     if not e:
         return get_data_error_result(message="canvas not found.")
         flow["permission"] = req["permission"]
     if req["avatar"]:
         flow["avatar"] = req["avatar"]
-    if not UserCanvasService.query(user_id=current_user.id, id=req["id"]):
-        return get_json_result(
-            data=False, message='Only owner of canvas authorized for this operation.',
-            code=RetCode.OPERATING_ERROR)
+
     num= UserCanvasService.update_by_id(req["id"], flow)
     return get_json_result(data=num)
 
 @login_required
 def sessions(canvas_id):
     tenant_id = current_user.id
-    if not UserCanvasService.query(user_id=tenant_id, id=canvas_id):
-        return get_error_data_result(message=f"You don't own the agent {canvas_id}.")
+    if not UserCanvasService.accessible(canvas_id, tenant_id):
+        return get_json_result(
+            data=False, message='Only owner of canvas authorized for this operation.',
+            code=RetCode.OPERATING_ERROR)
 
     user_id = request.args.get("user_id")
     page_number = int(request.args.get("page", 1))

api/db/services/canvas_service.py

         agents = agents.paginate(page_number, items_per_page)
         return list(agents.dicts()), count
 
+    @classmethod
+    @DB.connection_context()
+    def accessible(cls, canvas_id, tenant_id):
+        from api.db.services.user_service import UserTenantService
+        e, c = UserCanvasService.get_by_tenant_id(canvas_id)
+        if not e:
+            return False
+
+        tids = [t.tenant_id for t in UserTenantService.query(user_id=tenant_id)]
+        if c["user_id"] != canvas_id and c["user_id"]  not in tids:
+            return False
+        return True
 
 def completion(tenant_id, agent_id, session_id=None, **kwargs):
     query = kwargs.get("query", "") or kwargs.get("question", "")