feat(staffchat): 路由+API client+类型+relativeChatTime(还原旧页WIP+占位StaffChat)

- 还原 ChatTimeline.vue/api/index.ts 未提交 WIP(新页自建,旧文件回 HEAD)
- /staff-chat/:ownerId/:tab?/:talkerId? 路由 + 占位 StaffChat.vue(Task 9 替换)
- types: MomentsPost/MomentsList/StaffStatsCounts/StaffStatsDetail +
  ChatSession.pinned + Account.avatar
- api: getMoments/getStaffStatsCounts/getStaffStatsDetail + sessions
  is_del + messages msg_type/q 过滤
- format: relativeChatTime(今天HH:mm/昨天/M月D日/YYYY年M月D日) + 4 例
  vitest spec(全过,vitest 未入 devDependencies,npx 拉取运行)
- tsconfig.app.json exclude __tests__(vitest 未装,保持 vue-tsc 通过)

Co-Authored-By: Claude <noreply@anthropic.com>

yunkes/src/router/index.ts

@@ -82,6 +82,15 @@ const routes: RouteRecordRaw[] = [
     props: true,
     meta: { title: '群聊记录' },
   },
+  {
+    // 员工聊天窗口(对齐云客 wechat-window 五视图): tab=single|group|moments|contacts|stats
+    // tab=group 时 talkerId 语义为 roomId; ?msgid= 定位消息(红包转账明细跳转)
+    path: '/staff-chat/:ownerId/:tab(single|group|moments|contacts|stats)?/:talkerId?',
+    name: 'staff-chat',
+    component: () => import('@/views/StaffChat.vue'),
+    props: true,
+    meta: { title: '员工聊天窗口' },
+  },
   {
     // Anything else → back to the list.
     path: '/:pathMatch(.*)*',