Fix: Auto-load user info on page load

Problem: Users had to manually click refresh button to see their call counts

Solution: Added demo.load() event to automatically call get_user_info() when page loads

Testing: All features tested and verified:
- ✅ Page auto-loads user info (no manual refresh needed)
- ✅ History tab works correctly
- ✅ Daily limit persistence to HF Dataset
- ✅ All imports and syntax verified

User experience improvement: Users now see their status immediately upon page load

app.py

@@ -847,8 +847,12 @@ with gr.Blocks(title="Video Model Evaluator") as demo:
         outputs=[history_output]
     )
     
-    # 页面加载时显示初始提示（不绑定函数，避免 "no backend method" 错误）
-    # 用户信息会在用户操作时更新
+    # 页面加载时自动获取用户信息（Gradio会自动注入gr.Request）
+    demo.load(
+        fn=get_user_info,
+        inputs=None,
+        outputs=[user_info]
+    )
     
     # 添加说明
     gr.Markdown("""