fix(config): 更新开发默认服务器地址

test/config/server_endpoint_test.dart

@@ -57,7 +57,7 @@ void main() {
   });
 
   test('should_use_the_configured_lan_address_for_device_default', () {
-    expect(AppConfig.devHostBaseUrl, 'http://10.157.242.1:8081');
+    expect(AppConfig.devHostBaseUrl, 'http://192.168.31.187:8081');
   });
 
   test('should_apply_stored_url_only_when_debug_is_enabled', () async {