feat: add public tenant packages listing and sort order

src/Infrastructure/TakeoutSaaS.Infrastructure/Migrations/20251211150000_AddTenantPackageSortOrder.cs

@@ -0,0 +1,50 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace TakeoutSaaS.Infrastructure.Migrations
+{
+    /// <summary>
+    /// 为租户套餐新增排序字段与索引的迁移。
+    /// </summary>
+    /// <inheritdoc />
+    public partial class AddTenantPackageSortOrder : Migration
+    {
+        /// <summary>
+        /// 升级：新增排序列并创建索引。
+        /// </summary>
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            // 1. 新增排序列，默认 0
+            migrationBuilder.AddColumn<int>(
+                name: "SortOrder",
+                table: "tenant_packages",
+                type: "integer",
+                nullable: false,
+                defaultValue: 0,
+                comment: "展示排序，数值越小越靠前。");
+
+            // 2. 创建可售+排序索引用于前台查询
+            migrationBuilder.CreateIndex(
+                name: "IX_tenant_packages_IsActive_SortOrder",
+                table: "tenant_packages",
+                columns: new[] { "IsActive", "SortOrder" });
+        }
+
+        /// <summary>
+        /// 回滚：删除索引并移除排序列。
+        /// </summary>
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            // 1. 移除索引
+            migrationBuilder.DropIndex(
+                name: "IX_tenant_packages_IsActive_SortOrder",
+                table: "tenant_packages");
+
+            // 2. 回滚排序列
+            migrationBuilder.DropColumn(
+                name: "SortOrder",
+                table: "tenant_packages");
+        }
+    }
+}

src/Infrastructure/TakeoutSaaS.Infrastructure/Migrations/TakeoutAppDbContextModelSnapshot.cs

@@ -6247,6 +6247,12 @@ namespace TakeoutSaaS.Infrastructure.Migrations
                         .HasColumnType("boolean")
                         .HasComment("是否仍可售卖。");
 
+                    b.Property<int>("SortOrder")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasDefaultValue(0)
+                        .HasComment("展示排序，数值越小越靠前。");
+
                     b.Property<int?>("MaxAccountCount")
                         .HasColumnType("integer")
                         .HasComment("允许创建的最大账号数。");
@@ -6295,6 +6301,8 @@ namespace TakeoutSaaS.Infrastructure.Migrations
 
                     b.HasKey("Id");
 
+                    b.HasIndex("IsActive", "SortOrder");
+
                     b.ToTable("tenant_packages", null, t =>
                         {
                             t.HasComment("平台提供的租户套餐定义。");