feat: 优化 H5 线路切换逻辑；实现独立 WebView 管理和状态控制

lib/config/app_config.dart

@@ -76,29 +76,11 @@ class AppConfig {
   }
 
   static bool shouldRewriteMainFrameUrl(String url) {
-    final uri = Uri.tryParse(url);
-    if (uri == null) {
-      return false;
-    }
-
-    final host = uri.host.toLowerCase();
-    return (legacyWebHosts.contains(host) && !_isConfiguredH5Host(host)) ||
-        _hasShellParams(uri);
+    return false;
   }
 
   static String canonicalizeMainFrameUrl(String url) {
-    final uri = _removeShellParams(Uri.parse(url));
-    final host = uri.host.toLowerCase();
-    if (!legacyWebHosts.contains(host) || _isConfiguredH5Host(host)) {
-      return uri.toString();
-    }
-
-    return uri
-        .replace(
-          scheme: 'https',
-          host: canonicalWebHost,
-        )
-        .toString();
+    return url;
   }
 
   static int? lineIndexForUrl(String url) {
@@ -134,16 +116,6 @@ class AppConfig {
     );
   }
 
-  static bool _hasShellParams(Uri uri) {
-    final fragmentParameters = Uri.splitQueryString(uri.fragment);
-    return uri.queryParameters.containsKey('flutter_shell') ||
-        uri.queryParameters.containsKey('shell_cache_bust') ||
-        uri.queryParameters.containsKey('shell_app_name') ||
-        uri.queryParameters.containsKey('shell_app_logo') ||
-        fragmentParameters.containsKey('shell_app_name') ||
-        fragmentParameters.containsKey('shell_app_logo');
-  }
-
   static int _safeLineIndex(int index, int length) {
     if (length <= 0 || index < 0 || index >= length) {
       return 0;
@@ -151,10 +123,6 @@ class AppConfig {
     return index;
   }
 
-  static bool _isConfiguredH5Host(String host) {
-    return h5Lines.any((line) => line.uri.host.toLowerCase() == host);
-  }
-
   static bool _isSameLine(Uri lineUri, Uri uri) {
     if (lineUri.host.toLowerCase() != uri.host.toLowerCase()) {
       return false;