refactor: 移除 VSCode 设置中的配置项，使用预配置的默认值

package.json

@@ -70,27 +70,7 @@
         "id": "iccoder",
         "label": "IC Coder"
       }
-    ],
-    "configuration": {
-      "title": "IC Coder",
-      "properties": {
-        "icCoder.backendUrl": {
-          "type": "string",
-          "default": "http://192.168.1.108:2233",
-          "description": "后端服务地址"
-        },
-        "icCoder.timeout": {
-          "type": "number",
-          "default": 60000,
-          "description": "请求超时时间（毫秒）"
-        },
-        "icCoder.userId": {
-          "type": "string",
-          "default": "default-user",
-          "description": "用户ID（临时配置）"
-        }
-      }
-    }
+    ]
   },
   "scripts": {
     "vscode:prepublish": "pnpm run package",