task-82(店铺中心): 实现店铺密钥列表加载

新增 shop-key-model.ts(ShopKeyPageVo camel 解析、白名单状态归一、snake
兜底) 与 shop-key-api.ts(GET /api/admin/shop-keys 加载适配)；纯逻辑解析、
页面不内联请求。

TDD: task-82.test.ts 8 用例先 RED 后 GREEN。

admin-frontend-vue/src/pages/shop/shop-key-api.ts

@@ -0,0 +1,12 @@
+/** 店铺密钥列表加载适配（任务 82）：GET /api/admin/shop-keys + 分页归一与解析。 */
+import { http } from '@/api/http'
+import { parseShopKeyPage } from './shop-key-model'
+import { normalizeKeyListParams, toKeyPageQuery, type ShopKeyListParams, type ShopKeyPageResult } from './shop-dto.ts'
+
+export const SHOP_KEYS_ENDPOINT = '/api/admin/shop-keys'
+
+export async function fetchShopKeyList(params: Partial<ShopKeyListParams> = {}): Promise<ShopKeyPageResult> {
+  const normalized = normalizeKeyListParams(params)
+  const { data } = await http.get<unknown>(SHOP_KEYS_ENDPOINT, { params: toKeyPageQuery(normalized) })
+  return parseShopKeyPage(data)
+}