feat(points): 实现积分流水列表功能

- 后端新增 GET /api/v1/points/ledger 接口
- 前端新增积分流水列表页面
- 积分中心添加「查看流水」入口
- 重命名 AccountDeleteScreen 为 AccountDataScreen
- 流水列表支持分页加载和空状态展示

apps/lib/features/settings/presentation/screens/coin_center_screen.dart

@@ -90,6 +90,32 @@ class _CoinCenterScreenState extends State<CoinCenterScreen> {
     }
   }
 
+  Future<void> _reloadPackages() async {
+    try {
+      final sessionStore = SessionStore(LocalKvStore());
+      final apiClient = ApiClient(
+        baseUrl: appDependencies.backendUrl,
+        tokenProvider: sessionStore.getToken,
+      );
+
+      final api = PointsApi(apiClient.rawDio);
+      final result = await api.getPackages();
+
+      await _iapService?.loadStoreKitProducts(result.packages);
+
+      if (mounted) {
+        setState(() {
+          _packages = result.packages;
+        });
+      }
+    } catch (e, stackTrace) {
+      _logger.warning(
+        message: 'Failed to reload packages after purchase',
+        extra: {'error': e.toString()},
+      );
+    }
+  }
+
   void _onPurchaseStateChanged() {
     final service = _iapService;
     if (service == null || !mounted) return;
@@ -100,6 +126,7 @@ class _CoinCenterScreenState extends State<CoinCenterScreen> {
       case PurchaseFlowState.success:
         Toast.show(context, l10n.paymentSuccess, type: ToastType.success);
         _refreshBalance();
+        _reloadPackages();
         service.resetState();
         break;
       case PurchaseFlowState.failed:
@@ -265,7 +292,7 @@ class _CoinCenterScreenState extends State<CoinCenterScreen> {
     if (product != null) {
       return product.price;
     }
-    return pkg.priceDisplay;
+    return '';
   }
 
   Future<void> _handlePurchase(PackageInfo pkg) async {
@@ -284,6 +311,9 @@ class _CoinCenterScreenState extends State<CoinCenterScreen> {
   }
 
   String? _getPackageBadge(PackageInfo pkg, AppLocalizations l10n) {
+    if (pkg.productCode == ProductCode.newUserPack) {
+      return l10n.settingsCoinPackNewUserBadge;
+    }
     if (pkg.productCode == ProductCode.popularPack) {
       return l10n.settingsCoinPackPopularBadge;
     }
@@ -293,7 +323,7 @@ class _CoinCenterScreenState extends State<CoinCenterScreen> {
   String _getPackageTitle(PackageInfo pkg, AppLocalizations l10n) {
     return switch (pkg.productCode) {
       ProductCode.newUserPack => l10n.settingsCoinPackStarter,
-      ProductCode.basicPack => l10n.settingsCoinPackBasic,
+      ProductCode.starterPack => l10n.settingsCoinPackBasic,
       ProductCode.popularPack => l10n.settingsCoinPackPopular,
       ProductCode.premiumPack => l10n.settingsCoinPackPremium,
     };