feat(store): add dedicated pickup mode save endpoint

src/Api/TakeoutSaaS.TenantApi/Contracts/Store/StorePickupContracts.cs

@@ -227,6 +227,21 @@ public sealed class SavePickupFineRuleRequest
     public PickupFineRuleDto FineRule { get; set; } = new();
 }
 
+/// <summary>
+/// 保存自提模式请求。
+/// </summary>
+public sealed class SavePickupModeRequest
+{
+    /// <summary>
+    /// StoreId。
+    /// </summary>
+    public string StoreId { get; set; } = string.Empty;
+    /// <summary>
+    /// Mode。
+    /// </summary>
+    public string Mode { get; set; } = string.Empty;
+}
+
 /// <summary>
 /// 复制自提设置请求。
 /// </summary>

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

@@ -182,6 +182,26 @@ public sealed class StorePickupController(
         return ApiResponse<object>.Ok(null);
     }
 
+    /// <summary>
+    /// 保存自提模式。
+    /// </summary>
+    [HttpPost("pickup/mode/save")]
+    [ProducesResponseType(typeof(ApiResponse<object>), StatusCodes.Status200OK)]
+    public async Task<ApiResponse<object>> SaveMode([FromBody] SavePickupModeRequest request, CancellationToken cancellationToken)
+    {
+        var parsedStoreId = StoreApiHelpers.ParseRequiredSnowflake(request.StoreId, "storeId");
+        var mode = ParseRequiredPickupMode(request.Mode);
+        var (tenantId, merchantId) = StoreApiHelpers.GetTenantMerchantContext(storeContextService);
+        await StoreApiHelpers.EnsureStoreAccessibleAsync(dbContext, tenantId, merchantId, parsedStoreId, cancellationToken);
+
+        var setting = await EnsurePickupSettingAsync(tenantId, parsedStoreId, cancellationToken);
+        setting.Mode = mode;
+        setting.RowVersion = CreateRowVersion();
+
+        await dbContext.SaveChangesAsync(cancellationToken);
+        return ApiResponse<object>.Ok(null);
+    }
+
     /// <summary>
     /// 复制自提设置。
     /// </summary>
@@ -305,6 +325,16 @@ public sealed class StorePickupController(
         return RandomNumberGenerator.GetBytes(16);
     }
 
+    private static StorePickupMode ParseRequiredPickupMode(string? mode)
+    {
+        return (mode ?? string.Empty).Trim().ToLowerInvariant() switch
+        {
+            "big" => StorePickupMode.Big,
+            "fine" => StorePickupMode.Fine,
+            _ => throw new BusinessException(ErrorCodes.BadRequest, "mode 非法")
+        };
+    }
+
     private static PickupFineRuleDto? ParseFineRule(string? raw)
     {
         if (string.IsNullOrWhiteSpace(raw))