fix(mobile-app): always fetch deposit address from server in deposit_service

Remove local storage cache priority to avoid returning wrong address
after account switching. Always fetch from server API to ensure the
address belongs to the currently logged-in user.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/mobile-app/lib/core/services/deposit_service.dart

@@ -90,31 +90,15 @@ class DepositService {
 
   /// 获取充值地址
   ///
-  /// 优先从本地存储获取，如果没有则从服务器获取
+  /// 始终从服务器获取，确保返回当前登录用户的正确地址
+  /// 不使用本地缓存，避免切换账号后显示错误的地址
   /// 返回用户的 KAVA 和 BSC 充值地址
   Future<DepositAddressResponse> getDepositAddresses() async {
     try {
       debugPrint('获取充值地址...');
 
-      // 先尝试从本地存储读取
-      final kavaAddress = await _secureStorage.read(key: StorageKeys.walletAddressKava);
-      final bscAddress = await _secureStorage.read(key: StorageKeys.walletAddressBsc);
-      final dstAddress = await _secureStorage.read(key: StorageKeys.walletAddressDst);
-
-      if (kavaAddress != null && kavaAddress.isNotEmpty &&
-          bscAddress != null && bscAddress.isNotEmpty &&
-          dstAddress != null && dstAddress.isNotEmpty) {
-        debugPrint('从本地存储获取充值地址: kava=$kavaAddress, bsc=$bscAddress, dst=$dstAddress');
-        return DepositAddressResponse(
-          kavaAddress: kavaAddress,
-          bscAddress: bscAddress,
-          dstAddress: dstAddress,
-          isValid: true,
-        );
-      }
-
-      // 本地没有，从服务器获取
-      debugPrint('本地无缓存，从服务器获取钱包地址...');
+      // 始终从服务器获取，确保是当前用户的地址
+      debugPrint('从服务器获取钱包地址...');
       final response = await _apiClient.get('/user/wallet');
 
       if (response.statusCode == 200) {