feat: profile 返回当前套餐名称

在认证档案中增加 packageName 字段，并基于租户当前有效订阅从套餐表读取名称返回给前端，便于头像下拉直接展示真实套餐信息。

src/Api/TakeoutSaaS.TenantApi/Controllers/AuthController.cs

@@ -68,6 +68,7 @@ public sealed class AuthController(IAdminAuthService authService) : BaseApiContr
     ///     "account": "admin",
     ///     "displayName": "租户管理员",
     ///     "tenantId": "100000000000000001",
+    ///     "packageName": "标准版",
     ///     "roles": ["tenant-admin"],
     ///     "permissions": ["identity:profile:read", "merchant:read"]
     ///   }

src/Application/TakeoutSaaS.Application/Identity/Contracts/CurrentUserProfile.cs

@@ -44,4 +44,9 @@ public sealed class CurrentUserProfile
     /// 头像地址（可选）。
     /// </summary>
     public string? Avatar { get; init; }
+
+    /// <summary>
+    /// 当前订阅套餐名称（可选）。
+    /// </summary>
+    public string? PackageName { get; init; }
 }

src/Application/TakeoutSaaS.Application/Identity/Services/AdminAuthService.cs

@@ -4,6 +4,7 @@ using TakeoutSaaS.Application.Identity.Contracts;
 using TakeoutSaaS.Domain.Identity.Entities;
 using TakeoutSaaS.Domain.Identity.Enums;
 using TakeoutSaaS.Domain.Identity.Repositories;
+using TakeoutSaaS.Domain.Tenants.Repositories;
 using TakeoutSaaS.Shared.Abstractions.Constants;
 using TakeoutSaaS.Shared.Abstractions.Exceptions;
 using TakeoutSaaS.Shared.Abstractions.Results;
@@ -21,6 +22,8 @@ public sealed class AdminAuthService(
     IPermissionRepository permissionRepository,
     IRolePermissionRepository rolePermissionRepository,
     IMenuRepository menuRepository,
+    ITenantRepository tenantRepository,
+    ITenantPackageRepository tenantPackageRepository,
     IPasswordHasher<IdentityUser> passwordHasher,
     IJwtTokenService jwtTokenService,
     IRefreshTokenStore refreshTokenStore,
@@ -229,12 +232,20 @@ public sealed class AdminAuthService(
 
     private async Task<CurrentUserProfile> BuildProfileAsync(IdentityUser user, CancellationToken cancellationToken)
     {
+        // 1. 读取用户角色
         var tenantId = user.TenantId;
         var roles = await ResolveUserRolesAsync(tenantId, user.Id, cancellationToken);
-        // 1. 强制仅允许租户管理员登录（不支持超级管理员）
+
+        // 2. 强制仅允许租户管理员登录（不支持超级管理员）
         EnsureTenantAdmin(tenantId, roles);
-        // 2. 加载权限并返回档案
+
+        // 3. 加载权限
         var permissions = await ResolveUserPermissionsAsync(tenantId, user.Id, cancellationToken);
+
+        // 4. 读取当前套餐名称（严格以数据库为准）
+        var packageName = await ResolveTenantPackageNameAsync(tenantId, cancellationToken);
+
+        // 5. 返回用户档案
         return new CurrentUserProfile
         {
             UserId = user.Id,
@@ -244,10 +255,31 @@ public sealed class AdminAuthService(
             MerchantId = user.MerchantId,
             Roles = roles,
             Permissions = permissions,
-            Avatar = user.Avatar
+            Avatar = user.Avatar,
+            PackageName = packageName
         };
     }
 
+    private async Task<string?> ResolveTenantPackageNameAsync(long tenantId, CancellationToken cancellationToken)
+    {
+        // 1. 查询当前有效订阅
+        var subscription = await tenantRepository.GetActiveSubscriptionAsync(tenantId, cancellationToken);
+        if (subscription == null)
+        {
+            return null;
+        }
+
+        // 2. 查询订阅关联套餐
+        var package = await tenantPackageRepository.FindByIdAsync(subscription.TenantPackageId, cancellationToken);
+        if (package == null)
+        {
+            return null;
+        }
+
+        // 3. 返回套餐名称
+        return package.Name;
+    }
+
     private void EnsureTenantMatched(long userTenantId)
     {
         // 1. 读取当前租户