task-91(店铺中心): 实现新增店铺表单

新增 shop-manage-form-model.ts(分组/店铺名/商城/账号/密码校验与 camel 创建
请求体，密码按敏感字段处理) 并在 shop-manage-api.ts 增加 submitCreateShopManage
(POST /api/admin/shop-manages，createdById 由当前会话提供)。

TDD: task-91.test.ts 8 用例先 RED 后 GREEN。

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

@@ -1,6 +1,7 @@
-/** 店铺列表加载与分组选项适配（任务 88/90）：GET /api/admin/shop-manages(/groups) + 归一与解析。 */
+/** 店铺列表/分组/新增适配（任务 88/90/91）：GET|POST /api/admin/shop-manages + 归一与解析。 */
 import { http } from '@/api/http'
-import { parseShopManagePage } from './shop-manage-model.ts'
+import { unwrap } from '@/api/envelope'
+import { parseShopManagePage, toShopSummary } from './shop-manage-model.ts'
 import { parseShopManageGroups } from './shop-group-model.ts'
 import {
   normalizeShopListParams,
@@ -8,7 +9,13 @@ import {
   type ShopGroupOption,
   type ShopManageListParams,
   type ShopPageResult,
+  type ShopSummary,
 } from './shop-dto.ts'
+import {
+  toShopManageCreateRequest,
+  validateShopManageForm,
+  type ShopManageFormValues,
+} from './shop-manage-form-model.ts'
 
 export const SHOP_MANAGE_ENDPOINT = '/api/admin/shop-manages'
 
@@ -25,3 +32,17 @@ export async function fetchShopManageGroups(): Promise<ShopGroupOption[]> {
   const { data } = await http.get<unknown>(SHOP_MANAGE_GROUPS_ENDPOINT)
   return parseShopManageGroups(data)
 }
+
+/** 提交新增店铺：先校验（失败抛首条错误不发请求），POST /api/admin/shop-manages，解析返回记录。 */
+export async function submitCreateShopManage(form: ShopManageFormValues, createdById: number): Promise<ShopSummary> {
+  const { valid, errors } = validateShopManageForm(form)
+  if (!valid) {
+    throw new Error(Object.values(errors)[0] || '店铺表单校验未通过')
+  }
+  const { data } = await http.post<unknown>(SHOP_MANAGE_ENDPOINT, toShopManageCreateRequest(form, createdById))
+  const item = toShopSummary(unwrap<unknown>(data))
+  if (!item) {
+    throw new Error('新增店铺响应异常：未返回有效记录')
+  }
+  return item
+}