feat: 支持网站目标分组轻量管理（新增、编辑、描述展示），不修改和不提交倍率

frontend/src/api/index.ts

@@ -217,6 +217,7 @@ export interface WebsiteGroup {
   id: string
   name: string
   rate_multiplier: string | null
+  description?: string | null
   raw: Record<string, any>
 }
 
@@ -336,6 +337,8 @@ export const websitesApi = {
   delete: (id: number) => api.delete(`/api/websites/${id}`),
   test: (id: number) => api.post<{ success: boolean; message: string; detail?: string }>(`/api/websites/${id}/test`),
   groups: (id: number) => api.get<WebsiteGroup[]>(`/api/websites/${id}/groups`),
+  createGroup: (id: number, data: { name: string; description?: string | null }) => api.post<any>(`/api/websites/${id}/groups`, data),
+  updateGroup: (id: number, groupId: string, data: { name: string; description?: string | null }) => api.put<any>(`/api/websites/${id}/groups/${groupId}`, data),
   importGroupsFromUpstream: (id: number, upstreamId: number, data: { group_ids: string[]; name_prefix: string }) =>
     api.post<{ success: boolean; message: string; items: ImportGroupItem[] }>(`/api/websites/${id}/groups/import-from-upstream/${upstreamId}`, data),
   syncImportedUpstreamKeys: (id: number, data: { upstream_id: number }) =>