fix(file): 修复商品详情截图与提现打款凭证等私有图片 403 权限问题

- 放宽公开商品截图 key 提取规则，支持任意合规 object key 转换为免鉴权公开端点
- 补充后台截图上传 listing_screenshot 与 operating-expense 场景识别
- dependencies 授权器支持已审核上架商品截图兜底放行、提现人打款凭证鉴权及变体后缀匹配
- /api/files 路由组支持用户与管理员双重鉴权 (AuthUserOrAdmin)
- 前端收款账号凭证与提现详情凭证统一升级为 AuthImage 组件并支持大图预览

frontend/src/features/admin/components/ImageEditorDialog.vue

@@ -484,7 +484,7 @@ async function handleSave() {
     }
 
     const file = new File([blob], `edited_screenshot_${Date.now()}.jpg`, { type: 'image/jpeg' })
-    const uploaded = await uploadAdminFile(file, 'listing_screenshot')
+    const uploaded = await uploadAdminFile(file, 'listing')
     if (!uploaded || !uploaded.url) {
       throw new Error('上传截图失败')
     }

frontend/src/features/admin/components/WithdrawalDetailDialog.vue

@@ -289,9 +289,13 @@ function accountTypeLabel(type: string) {
             {{ withdrawal.payment_remark }}
           </el-descriptions-item>
           <el-descriptions-item v-if="withdrawal.payment_proof_url" label="打款凭证" :span="2">
-            <el-link :href="withdrawal.payment_proof_url" target="_blank" type="primary">
-              查看凭证
-            </el-link>
+            <AuthImage
+              :source="withdrawal.payment_proof_url"
+              admin
+              alt="打款凭证"
+              class="certificate-image"
+              :preview-src-list="[withdrawal.payment_proof_url]"
+            />
           </el-descriptions-item>
         </el-descriptions>
       </div>