From 4a1b228d953b1accd8210285f281bbe242ef07f0 Mon Sep 17 00:00:00 2001
From: 437147838 <437147838@qq.com>
Date: Sat, 30 May 2026 23:59:48 +0800
Subject: [PATCH] fix: remove redundant .to_dict() call in list_tasks API

TaskManager.list_tasks() already returns serialized dicts, so calling
.to_dict() on each item causes AttributeError: 'dict' object has no
attribute 'to_dict'

Fixes: AttributeError in /api/graph/tasks endpoint
---
 backend/app/api/graph.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/backend/app/api/graph.py b/backend/app/api/graph.py
index 759ff48b0e..ba9f458feb 100644
--- a/backend/app/api/graph.py
+++ b/backend/app/api/graph.py
@@ -559,7 +559,7 @@ def list_tasks():
     
     return jsonify({
         "success": True,
-        "data": [t.to_dict() for t in tasks],
+        "data": tasks,  # list_tasks() already returns to_dict() results
         "count": len(tasks)
     })