feat: 优化

flutter_monisuo/lib/providers/market_provider.dart

@@ -12,6 +12,7 @@ class MarketProvider extends ChangeNotifier {
   String _searchKeyword = '';
   bool _isLoading = false;
   String? _error;
+  bool _coinsLoaded = false; // 标记是否已加载
 
   MarketProvider(this._marketService);
 
@@ -24,7 +25,12 @@ class MarketProvider extends ChangeNotifier {
   String get searchKeyword => _searchKeyword;
 
   /// 加载币种列表
-  Future<void> loadCoins() async {
+  Future<void> loadCoins({bool force = false}) async {
+    // 如果已经加载过且不是强制刷新，则跳过
+    if (_coinsLoaded && !force && _allCoins.isNotEmpty) {
+      return;
+    }
+
     _isLoading = true;
     _error = null;
     notifyListeners();
@@ -35,6 +41,7 @@ class MarketProvider extends ChangeNotifier {
       if (response.success) {
         _allCoins = response.data ?? [];
         _filterCoins();
+        _coinsLoaded = true;
       } else {
         _error = response.message;
       }
@@ -100,6 +107,15 @@ class MarketProvider extends ChangeNotifier {
 
   /// 刷新
   Future<void> refresh() async {
-    await loadCoins();
+    await loadCoins(force: true);
+  }
+
+  /// 重置加载状态（用于退出登录时）
+  void resetLoadState() {
+    _coinsLoaded = false;
+    _allCoins = [];
+    _filteredCoins = [];
+    _error = null;
+    notifyListeners();
   }
 }