feat: add public tenant packages listing and sort order

src/Application/TakeoutSaaS.Application/App/Tenants/Handlers/SearchTenantPackagesQueryHandler.cs

@@ -19,10 +19,12 @@ public sealed class SearchTenantPackagesQueryHandler(ITenantPackageRepository pa
         var packages = await packageRepository.SearchAsync(request.Keyword, request.IsActive, cancellationToken);
 
         // 2. 排序与分页
-        var ordered = packages.OrderByDescending(x => x.CreatedAt).ToList();
+        var ordered = packages
+            .OrderBy(x => x.SortOrder)
+            .ThenByDescending(x => x.CreatedAt)
+            .ToList();
         var pageIndex = request.Page <= 0 ? 1 : request.Page;
         var size = request.PageSize <= 0 ? 20 : request.PageSize;
-
         var pagedItems = ordered
             .Skip((pageIndex - 1) * size)
             .Take(size)