feat: 对齐常驻商城与七鱼客服交互

- 同步商城 H5 登录态与原生 token
- 完善商城/原生 tab 切换、动画及返回交互
- 修复七鱼客服键盘避让和状态栏恢复
- 调整开屏跳过按钮与登录入口交互

lib/features/mall/application/mall_entry_controller.dart

@@ -0,0 +1,60 @@
+import 'package:flutter/material.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+
+import '../../web/application/mall_web_host_controller.dart';
+import 'mall_tab_config.dart';
+
+enum MallEntryOpenResult { opened, unavailable, failed, alreadyOpening }
+
+class MallEntryController {
+  MallEntryController(this._ref);
+
+  final Ref _ref;
+  bool _opening = false;
+
+  Future<MallEntryOpenResult> open(
+    BuildContext context, {
+    MallTabConfig? initialConfig,
+  }) async {
+    if (_opening) return MallEntryOpenResult.alreadyOpening;
+    _opening = true;
+    try {
+      var config = initialConfig;
+      if (config?.isVisible != true) {
+        config = await _ref.read(mallTabConfigProvider.notifier).ensureLoaded();
+      }
+      if (config?.isVisible != true || !context.mounted) {
+        return MallEntryOpenResult.unavailable;
+      }
+      final clickId = await _ref
+          .read(mallTabConfigProvider.notifier)
+          .recordClick();
+      if (clickId == null || !context.mounted) {
+        return MallEntryOpenResult.unavailable;
+      }
+      _ref
+          .read(mallClickAttributionProvider.notifier)
+          .state = MallClickAttribution(
+        adId: config!.adId,
+        trackingId: config.trackingId,
+        clickId: clickId,
+      );
+      final uri = config.attributedUri(
+        clickId: clickId,
+        isDark: Theme.of(context).brightness == Brightness.dark,
+      );
+      if (uri == null) return MallEntryOpenResult.unavailable;
+      // The bottom mall entry is always resident. Server open-mode metadata is
+      // still retained for attribution, while explicit links inside H5 decide
+      // their own external handoff through the WebView navigation policy.
+      MallWebHostController.instance.open(uri);
+      return MallEntryOpenResult.opened;
+    } catch (_) {
+      return MallEntryOpenResult.failed;
+    } finally {
+      _opening = false;
+    }
+  }
+}
+
+final mallEntryControllerProvider = Provider((ref) => MallEntryController(ref));

lib/features/mall/application/mall_tab_config.dart

@@ -1,3 +1,4 @@
+import 'dart:convert';
 import 'dart:typed_data';
 
 import 'package:dio/dio.dart';
@@ -145,6 +146,62 @@ final mallTabConfigProvider =
       (ref) => MallTabConfigController(ref.watch(dioProvider)),
     );
 
+class MallClickAttribution {
+  const MallClickAttribution({
+    required this.adId,
+    required this.trackingId,
+    required this.clickId,
+  });
+
+  final String adId;
+  final String trackingId;
+  final String clickId;
+}
+
+final mallClickAttributionProvider = StateProvider<MallClickAttribution?>(
+  (ref) => null,
+);
+
+Map<String, dynamic> buildEnterWebMallBridgeArguments({
+  required Uri currentUri,
+  required bool logged,
+  required bool isDark,
+  String? authToken,
+  String? scene,
+  String? sourceApp,
+  MallClickAttribution? attribution,
+}) {
+  final query = currentUri.queryParameters;
+  final resolvedSourceApp = sourceApp?.trim().isNotEmpty == true
+      ? sourceApp!.trim()
+      : mallSourceApp;
+  final arguments = <String, dynamic>{
+    ...query,
+    'from': resolvedSourceApp,
+    'source_app': resolvedSourceApp,
+    'source_entry': query['source_entry'] ?? 'mall_tab',
+    'placement': query['placement'] ?? 'mall_tab',
+    'hook_type': query['hook_type'] ?? 'mall_tab',
+    'target_app': query['target_app'] ?? 'mall',
+    'logged': logged,
+    'isNight': isDark ? '1' : '0',
+  };
+  final adId = attribution?.adId.trim() ?? '';
+  if (adId.isNotEmpty) arguments['ad_id'] = adId;
+  final trackingId = attribution?.trackingId.trim() ?? '';
+  if (trackingId.isNotEmpty) arguments['tracking_id'] = trackingId;
+  final clickId = attribution?.clickId.trim() ?? '';
+  if (clickId.isNotEmpty) arguments['click_id'] = clickId;
+  final token = authToken?.trim() ?? '';
+  if (token.isNotEmpty) {
+    arguments['auth_token'] = token;
+    arguments['authToken'] = token;
+  }
+  final resolvedScene = scene?.trim() ?? '';
+  if (resolvedScene.isNotEmpty) arguments['scene'] = resolvedScene;
+  return arguments;
+}
+
 String _nonEmpty(String value, String fallback) =>
     value.trim().isEmpty ? fallback : value.trim();
 
@@ -166,7 +223,7 @@ class _ProtoMessage {
   int integer(int wanted) =>
       _fields()[wanted] is int ? _fields()[wanted]! as int : 0;
   String string(int wanted) => _fields()[wanted] is List<int>
-      ? String.fromCharCodes(_fields()[wanted]! as List<int>)
+      ? utf8.decode(_fields()[wanted]! as List<int>, allowMalformed: true)
       : '';
   _ProtoMessage message(int wanted) => _ProtoMessage(
     _fields()[wanted] is List<int> ? _fields()[wanted]! as List<int> : const [],