update app

app.py

@@ -2090,7 +2090,7 @@ def create_demo() -> gr.Blocks:
                 # 预设选择
                 gr.HTML("<div class='green-header'>📋 Configuration Presets</div>")
                 # 修复：定义 preset_dropdown
-                preset_dropdown = gr.Dropdown(choices=list(PRESETS.keys()), value="Physics", show_label=False, container=False, interactive=True)
+                preset_dropdown = gr.Dropdown(choices=list(PRESETS.keys()), value="Math", show_label=False, container=False, interactive=True)
                 
                 # 任务描述
                 gr.HTML("<div class='green-header'>🎯 Task Description</div>")