fix: 推理菜单submenu指向正确的harnessed_reasoning菜单

之前'推理'菜单的submenu错误指向了/harnessed_agent/menu.ui，
改为/harnessed_reasoning/menu.ui后可以看到：
- 推理控制台
- 推理交互
- 推理会话
- 推理配置

wwwroot/menu.ui

@@ -18,7 +18,7 @@
 			{
 				"name": "reasoning",
 				"label": "推理",
-				"submenu": "{{entire_url('/harnessed_agent/menu.ui')}}"
+				"submenu": "{{entire_url('/harnessed_reasoning/menu.ui')}}"
 			},
 			{
 				"name": "pricing",