fix：第一轮跑

lib/features/web/presentation/web_page.dart

@@ -0,0 +1,123 @@
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+import 'package:url_launcher/url_launcher.dart';
+import 'package:webview_flutter/webview_flutter.dart';
+
+/// Shared HTTPS WebView host. Mall-specific residency and attribution are
+/// layered above this page so ordinary H5 links never receive mall state.
+class AppWebPage extends StatefulWidget {
+  const AppWebPage({
+    super.key,
+    required this.initialUri,
+    this.hideTitle = false,
+    this.allowedHosts = const <String>{},
+  });
+
+  final Uri initialUri;
+  final bool hideTitle;
+  final Set<String> allowedHosts;
+
+  @override
+  State<AppWebPage> createState() => _AppWebPageState();
+}
+
+class _AppWebPageState extends State<AppWebPage> {
+  late final WebViewController _controller;
+  var _progress = 0;
+  String? _error;
+  String _title = '';
+
+  @override
+  void initState() {
+    super.initState();
+    _controller = WebViewController()
+      ..setJavaScriptMode(JavaScriptMode.unrestricted)
+      ..addJavaScriptChannel(
+        'JinzhiBridge',
+        onMessageReceived: (message) {
+          if (message.message == 'close' && mounted) context.pop();
+        },
+      )
+      ..setNavigationDelegate(
+        NavigationDelegate(
+          onProgress: (progress) => setState(() => _progress = progress),
+          onPageFinished: (_) async {
+            final title = await _controller.getTitle();
+            if (mounted && title != null && title.trim().isNotEmpty) {
+              setState(() => _title = title.trim());
+            }
+          },
+          onWebResourceError: (error) {
+            if (error.isForMainFrame == true && mounted) {
+              setState(() => _error = error.description);
+            }
+          },
+          onNavigationRequest: _onNavigationRequest,
+        ),
+      )
+      ..loadRequest(widget.initialUri);
+  }
+
+  NavigationDecision _onNavigationRequest(NavigationRequest request) {
+    final uri = Uri.tryParse(request.url);
+    if (uri == null || !_isHttp(uri)) return NavigationDecision.prevent;
+    if (_allowsInApp(uri)) return NavigationDecision.navigate;
+    launchUrl(uri, mode: LaunchMode.externalApplication);
+    return NavigationDecision.prevent;
+  }
+
+  bool _allowsInApp(Uri uri) {
+    final host = uri.host.toLowerCase();
+    if (host == widget.initialUri.host.toLowerCase()) return true;
+    return widget.allowedHosts.any(
+      (allowed) => host == allowed || host.endsWith('.$allowed'),
+    );
+  }
+
+  bool _isHttp(Uri uri) =>
+      uri.hasAuthority && (uri.scheme == 'https' || uri.scheme == 'http');
+
+  Future<bool> _onPop() async {
+    if (await _controller.canGoBack()) {
+      await _controller.goBack();
+      return false;
+    }
+    return true;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final body = _error == null
+        ? Stack(
+            children: [
+              WebViewWidget(controller: _controller),
+              if (_progress < 100)
+                LinearProgressIndicator(value: _progress / 100),
+            ],
+          )
+        : Center(
+            child: Padding(
+              padding: const EdgeInsets.all(24),
+              child: Text('页面加载失败\n$_error', textAlign: TextAlign.center),
+            ),
+          );
+    return PopScope(
+      canPop: false,
+      onPopInvokedWithResult: (didPop, _) async {
+        if (!didPop && await _onPop() && context.mounted) context.pop();
+      },
+      child: Scaffold(
+        appBar: widget.hideTitle
+            ? null
+            : AppBar(title: Text(_title.isEmpty ? '加载中' : _title)),
+        body: body,
+      ),
+    );
+  }
+}
+
+Uri? parseSafeWebUri(String? raw) {
+  final uri = Uri.tryParse(raw?.trim() ?? '');
+  if (uri == null || !uri.hasAuthority) return null;
+  return uri.scheme == 'https' || uri.scheme == 'http' ? uri : null;
+}