feat: add user deletion functionality and fix known issues

app/Http/Resources/CouponResource.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Http\Resources;
+
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+/**
+ * 优惠券资源类
+ *
+ * @property array|null $limit_plan_ids 限制可用的套餐ID列表
+ */
+class CouponResource extends JsonResource
+{
+    /**
+     * 将资源转换为数组
+     *
+     * @param Request $request 请求实例
+     * @return array<string, mixed> 转换后的数组
+     */
+    public function toArray(Request $request): array
+    {
+        return [
+            ...$this->resource->toArray(),
+            'limit_plan_ids' => $this->when(
+                !empty($this->limit_plan_ids),
+                fn() => collect($this->limit_plan_ids)
+                    ->map(fn(mixed $id): string => (string) $id)
+                    ->values()
+                    ->all()
+            )
+        ];
+    }
+}