feat: 完成营销中心优惠券后端模块

src/Infrastructure/TakeoutSaaS.Infrastructure/Migrations/20260228023646_AddCouponTemplatePerUserLimit.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace TakeoutSaaS.Infrastructure.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddCouponTemplatePerUserLimit : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "PerUserLimit",
+                table: "coupon_templates",
+                type: "integer",
+                nullable: true,
+                comment: "每位用户可领取上限。");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "PerUserLimit",
+                table: "coupon_templates");
+        }
+    }
+}

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

@@ -548,6 +548,10 @@ namespace TakeoutSaaS.Infrastructure.Migrations
                         .HasColumnType("character varying(128)")
                         .HasComment("模板名称。");
 
+                    b.Property<int?>("PerUserLimit")
+                        .HasColumnType("integer")
+                        .HasComment("每位用户可领取上限。");
+
                     b.Property<string>("ProductScopeJson")
                         .HasColumnType("text")
                         .HasComment("适用品类或商品范围（JSON）。");