fix: mapApi缺少delete方法，前端提示不支持删除

frontend/src/api/index.ts

@@ -42,6 +42,7 @@ export const mapApi = {
   list: () => api.get('/maps'),
   create: (data: any) => api.post('/maps', data),
   update: (id: number, data: any) => api.put(`/maps/${id}`, data),
+  delete: (id: number) => api.delete(`/maps/${id}`),
   createWithTemplate: (data: any) => api.post('/maps/create-with-template', data),
 }