fix：对齐金值的报名验证，商城入口逻辑对齐

test/features/mall/mall_entry_promo_store_test.dart

@@ -0,0 +1,19 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:jinzhi_flutter_app/features/mall/application/mall_entry_promo_store.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+void main() {
+  test('records each first-install mall promotion exposure once', () async {
+    SharedPreferences.setMockInitialValues(<String, Object>{});
+    final store = MallEntryPromoStore(await SharedPreferences.getInstance());
+
+    expect(store.hasOpenedMall, isFalse);
+    expect(store.hasSeenHomeBadge, isFalse);
+
+    await store.markMallOpened();
+    await store.markHomeBadgeSeen();
+
+    expect(store.hasOpenedMall, isTrue);
+    expect(store.hasSeenHomeBadge, isTrue);
+  });
+}