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/web/application/web_reload_providers.dart

@@ -0,0 +1,28 @@
+import 'dart:async';
+
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+
+class JsEvent {
+  const JsEvent(this.method, [this.args]);
+
+  final String method;
+  final List<dynamic>? args;
+}
+
+class WebReloadController {
+  final _controller = StreamController<JsEvent>.broadcast();
+
+  Stream<JsEvent> get stream => _controller.stream;
+  void callEvent(JsEvent event) => _controller.add(event);
+  Future<void> dispose() => _controller.close();
+}
+
+final webReloadControllerProvider = Provider<WebReloadController>((ref) {
+  final controller = WebReloadController();
+  ref.onDispose(() => unawaited(controller.dispose()));
+  return controller;
+});
+
+final webReloadPProvider = StreamProvider.autoDispose<JsEvent>((ref) {
+  return ref.watch(webReloadControllerProvider).stream;
+});