优化桌面端无用菜单和地磅数据可手动功能。

yy-admin-master/YY.Admin.Services/Service/Warehouse/WarehouseService.cs

@@ -10,8 +10,7 @@ using YY.Admin.Core.Services;
 namespace YY.Admin.Services.Service.Warehouse;
 
 /// <summary>
-/// 仓库数据只读服务：启动时从后端拉取全量列表并缓存到磁盘，断网时回退本地缓存。
-/// 仅供其他模块的下拉筛选使用，不提供 CRUD。
+/// 仓库数据只读服务：启动与重连时后台刷新远端写入缓存；GetAllAsync 优先读缓存，避免库区等业务每次打开都全量拉仓库。
 /// </summary>
 public class WarehouseService : IWarehouseService, ISingletonDependency
 {
@@ -20,6 +19,7 @@ public class WarehouseService : IWarehouseService, ISingletonDependency
     private readonly INetworkMonitor _networkMonitor;
     private readonly ILoggerService _logger;
     private readonly object _cacheLock = new();
+    private readonly SemaphoreSlim _emptyLoadGate = new(1, 1);
     private readonly string _cacheFilePath;
     private List<MesXslWarehouse> _localCache = new();
 
@@ -64,19 +64,44 @@ public class WarehouseService : IWarehouseService, ISingletonDependency
 
     public async Task<List<MesXslWarehouse>> GetAllAsync(CancellationToken ct = default)
     {
-        if (_networkMonitor.IsOnline)
+        lock (_cacheLock)
         {
+            if (_localCache.Count > 0 || !_networkMonitor.IsOnline)
+                return _localCache.ToList();
+        }
+
+        // 缓存为空且在线：仅此时阻塞拉远端（首次安装或清缓存后）
+        await _emptyLoadGate.WaitAsync(ct).ConfigureAwait(false);
+        try
+        {
+            lock (_cacheLock)
+            {
+                if (_localCache.Count > 0)
+                    return _localCache.ToList();
+            }
+
+            if (!_networkMonitor.IsOnline)
+            {
+                lock (_cacheLock)
+                    return _localCache.ToList();
+            }
+
             try
             {
                 await RefreshFromRemoteAsync(ct).ConfigureAwait(false);
             }
-            catch { }
+            catch
+            {
+                /* 登录前拉取失败等场景，仍返回当前缓存（可能仍为空） */
+            }
+        }
+        finally
+        {
+            _emptyLoadGate.Release();
         }
 
         lock (_cacheLock)
-        {
             return _localCache.ToList();
-        }
     }
 
     private async Task RefreshFromRemoteAsync(CancellationToken ct)