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

test/features/web/mall_bridge_state_test.dart

@@ -0,0 +1,54 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:jinzhi_flutter_app/features/web/application/mall_bridge_state.dart';
+
+void main() {
+  test('updates state and forwards tab interactions before ready', () async {
+    final bridge = MallBridgeController.instance;
+    bridge.detach();
+    addTearDown(bridge.detach);
+    MallBridgeTab? activated;
+    bool? reselected;
+    var backCalls = 0;
+    bridge.attach(
+      activateTab: (tab, reselect) async {
+        activated = tab;
+        reselected = reselect;
+      },
+      goBack: () async => backCalls++,
+    );
+
+    await bridge.activate(MallBridgeTab.orders);
+    expect(activated, MallBridgeTab.orders);
+    expect(bridge.state.value.activeTab, MallBridgeTab.orders);
+
+    bridge.update(const {
+      'ready': true,
+      'activeTab': 'orders',
+      'canGoBack': true,
+    });
+    await bridge.activate(MallBridgeTab.orders, reselect: true);
+    await bridge.goBack();
+
+    expect(bridge.state.value.activeTab, MallBridgeTab.orders);
+    expect(bridge.state.value.canGoBack, isTrue);
+    expect(activated, MallBridgeTab.orders);
+    expect(reselected, isTrue);
+    expect(backCalls, 1);
+  });
+
+  test('accepts numeric and string booleans from H5', () {
+    final bridge = MallBridgeController.instance;
+    bridge.detach();
+    addTearDown(bridge.detach);
+
+    bridge.update(const {
+      'ready': 1,
+      'activeTab': 'market',
+      'canGoBack': 'true',
+    });
+
+    expect(bridge.state.value.ready, isTrue);
+    expect(bridge.state.value.activeTab, MallBridgeTab.market);
+    expect(bridge.state.value.canGoBack, isTrue);
+  });
+}