chore: remove temporary H5 cache diagnostics

lib/main.dart

@@ -11,48 +11,8 @@ import 'config/app_config.dart';
 const _shellBackground = Color(0xFFF8FBFF);
 const _shellAccent = Color(0xFF0089FF);
 const _shellSubText = Color(0xFF8E9AB0);
-const _showH5DebugOverlay = bool.fromEnvironment(
-  'H5_SHELL_DEBUG',
-  defaultValue: true,
-);
 const _shellBrandingChannel =
     MethodChannel('io.openim.flutter.im_webview_app/shell_branding');
-const _h5MountedCheckScript = r'''
-(() => document.body?.classList.contains('app-mounted') === true)();
-''';
-const _h5SnapshotScript = r'''
-(() => {
-  const shrinkAssetUrl = (value) => {
-    try {
-      const absolute = new URL(value, window.location.href).href;
-      const match = absolute.match(/\/assets\/[^?#]+/);
-      return match ? match[0] : absolute;
-    } catch (_) {
-      return value || '';
-    }
-  };
-
-  const scripts = Array.from(document.scripts)
-    .map((script) => script.src)
-    .filter(Boolean)
-    .map(shrinkAssetUrl)
-    .filter((src) => src.includes('/assets/'));
-  const bodyText = (document.body?.innerText || '')
-    .replace(/\s+/g, ' ')
-    .slice(0, 180);
-  let shellBrand = '';
-  try {
-    shellBrand = window.sessionStorage.getItem('OPENIM_FLUTTER_SHELL_BRAND') || '';
-  } catch (_) {}
-
-  return JSON.stringify({
-    href: window.location.href,
-    scripts,
-    bodyText,
-    shellBrand,
-  });
-})();
-''';
 
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();
@@ -137,7 +97,6 @@ class _H5ShellPageState extends State<H5ShellPage> {
 
   int _progress = 0;
   String? _loadError;
-  String _h5DebugText = 'H5 loading...';
   bool _showShellCover = true;
   bool _shellBrandingLoaded = false;
   late ShellBranding _shellBranding;
@@ -202,9 +161,7 @@ class _H5ShellPageState extends State<H5ShellPage> {
 
   Future<void> _handlePageFinished() async {
     await _loadShellBrandingIfNeeded();
-    await _waitForH5Mounted();
     await _syncShellBranding();
-    await _updateH5DebugSnapshot();
     if (mounted) {
       setState(() {
         _progress = 100;
@@ -247,58 +204,6 @@ class _H5ShellPageState extends State<H5ShellPage> {
     return _runJavaScriptSafely(script);
   }
 
-  Future<void> _waitForH5Mounted() async {
-    for (var index = 0; index < 20; index += 1) {
-      try {
-        final result = await _controller.runJavaScriptReturningResult(
-          _h5MountedCheckScript,
-        );
-        if (result == true || result.toString() == 'true') {
-          return;
-        }
-      } catch (_) {}
-      await Future<void>.delayed(const Duration(milliseconds: 100));
-    }
-  }
-
-  Future<void> _updateH5DebugSnapshot() async {
-    if (!_showH5DebugOverlay) {
-      return;
-    }
-
-    try {
-      final result = await _controller.runJavaScriptReturningResult(
-        _h5SnapshotScript,
-      );
-      final snapshot = _decodeJavaScriptStringResult(result);
-      debugPrint('[H5Shell] snapshot: $snapshot');
-      if (mounted) {
-        setState(() => _h5DebugText = snapshot);
-      }
-    } catch (error) {
-      debugPrint('[H5Shell] snapshot failed: $error');
-      if (mounted) {
-        setState(() => _h5DebugText = 'H5 snapshot failed: $error');
-      }
-    }
-  }
-
-  String _decodeJavaScriptStringResult(Object? result) {
-    if (result == null) {
-      return '';
-    }
-    if (result is String) {
-      try {
-        final decoded = jsonDecode(result);
-        if (decoded is String) {
-          return decoded;
-        }
-      } catch (_) {}
-      return result;
-    }
-    return result.toString();
-  }
-
   Future<void> _loadHome() async {
     await _loadUrl(_freshHomeUrl());
   }
@@ -314,18 +219,9 @@ class _H5ShellPageState extends State<H5ShellPage> {
       });
     }
 
-    await _clearWebViewHttpCache();
     await _controller.loadRequest(Uri.parse(targetUrl));
   }
 
-  Future<void> _clearWebViewHttpCache() async {
-    try {
-      await _controller.clearCache();
-    } catch (_) {
-      // Some WebView implementations can reject cache operations before first use.
-    }
-  }
-
   Future<NavigationDecision> _handleNavigationRequest(
     NavigationRequest request,
   ) async {
@@ -392,15 +288,6 @@ class _H5ShellPageState extends State<H5ShellPage> {
                   message: _loadError!,
                   onRetry: () => unawaited(_loadHome()),
                 ),
-              if (_showH5DebugOverlay)
-                Positioned(
-                  left: 8,
-                  right: 8,
-                  bottom: 10,
-                  child: IgnorePointer(
-                    child: _H5DebugOverlay(text: _h5DebugText),
-                  ),
-                ),
             ],
           ),
         ),
@@ -450,36 +337,6 @@ class _ErrorPanel extends StatelessWidget {
   }
 }
 
-class _H5DebugOverlay extends StatelessWidget {
-  const _H5DebugOverlay({required this.text});
-
-  final String text;
-
-  @override
-  Widget build(BuildContext context) {
-    return DecoratedBox(
-      decoration: BoxDecoration(
-        color: Colors.black.withValues(alpha: 0.72),
-        borderRadius: BorderRadius.circular(6),
-      ),
-      child: Padding(
-        padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 6),
-        child: Text(
-          text,
-          maxLines: 5,
-          overflow: TextOverflow.ellipsis,
-          style: const TextStyle(
-            color: Colors.white,
-            fontSize: 10,
-            height: 1.25,
-            letterSpacing: 0,
-          ),
-        ),
-      ),
-    );
-  }
-}
-
 class _ShellFallback extends StatelessWidget {
   const _ShellFallback();