feat: 添加应用品牌信息支持，重构主页 URL 生成逻辑

lib/config/app_config.dart

@@ -4,6 +4,8 @@ enum Environment {
 
 class AppConfig {
   static const Environment currentEnvironment = Environment.production;
+  static const String appName = '本地打包';
+  static const String appLogo = '';
 
   static final Map<Environment, List<String>> _environmentHosts = {
     Environment.production: [
@@ -15,11 +17,15 @@ class AppConfig {
     return _environmentHosts[currentEnvironment] ?? const [];
   }
 
-  static String get homeUrl {
+  static String homeUrl({String? appName, String? appLogo}) {
     final host = environmentHosts.isNotEmpty
         ? environmentHosts.first
         : 'h5-im.imharry.work';
-    return _normalizeHomeUrl(host);
+    return _withShellBranding(
+      _normalizeHomeUrl(host),
+      appName: appName,
+      appLogo: appLogo,
+    );
   }
 
   static String _normalizeHomeUrl(String host) {
@@ -29,4 +35,26 @@ class AppConfig {
     }
     return 'https://$value/';
   }
+
+  static String _withShellBranding(
+    String url, {
+    String? appName,
+    String? appLogo,
+  }) {
+    final uri = Uri.parse(url);
+    final queryParameters = Map<String, String>.from(uri.queryParameters)
+      ..['flutter_shell'] = '1';
+
+    final trimmedName = (appName ?? AppConfig.appName).trim();
+    if (trimmedName.isNotEmpty) {
+      queryParameters['shell_app_name'] = trimmedName;
+    }
+
+    final trimmedLogo = (appLogo ?? AppConfig.appLogo).trim();
+    if (trimmedLogo.isNotEmpty) {
+      queryParameters['shell_app_logo'] = trimmedLogo;
+    }
+
+    return uri.replace(queryParameters: queryParameters).toString();
+  }
 }