资料字段支持下拉选项与买家截图，大厅按 VIP 等级延迟可见

资料字段：
- CollectField 支持 type(text/select) 与 options，规则字段语法 key:名称#选项1,选项2
- 默认字段改为游戏编号/游戏昵称/系统(安卓,苹果)/区服(QQ区,微信区)，旧默认模板字段自动替换为新版
- 采集页与管理端补资料支持单选下拉与买家主页截图上传（新增公开上传接口）
- 管理端工单详情展示买家截图

VIP 延迟可见：
- 等级权限新增 visibleDelaySeconds（默认 VIP1=20s~VIP5=0s，可后台配置）
- 大厅按等级延迟过滤新发布工单，页面提示延迟规则

apps/frontend/src/pages/admin/panels/shared.tsx

@@ -164,6 +164,26 @@ export function getAcceptanceSubmittedAt(order: WorkOrder): string | null {
   return order.submittedAt || acceptanceSubmittedAt || null
 }
 
+export function getMaterialScreenshots(order: WorkOrder): UploadedFile[] {
+  const material = asRecord(order.material)
+  const collect = asRecord(material.collect)
+  const screenshots = Array.isArray(collect.screenshots) ? collect.screenshots : []
+  return screenshots
+    .map((item) => {
+      const file = asRecord(item)
+      const url = String(file.url || '').trim()
+      if (!url) return null
+      return {
+        objectKey: String(file.objectKey || file.object_key || '').trim(),
+        filename: String(file.originalFilename || file.filename || '').trim(),
+        url,
+        mediumUrl: String(file.mediumUrl || file.medium_url || '').trim(),
+        thumbnailUrl: String(file.thumbnailUrl || file.thumbnail_url || '').trim(),
+      } as UploadedFile
+    })
+    .filter((item): item is UploadedFile => Boolean(item))
+}
+
 export function asRecord(value: unknown): Record<string, unknown> {
   return value && typeof value === 'object' && !Array.isArray(value)
     ? (value as Record<string, unknown>)