feat(名字): 界面上不再显示 ks + 班号前缀，混着几个班的地方名字后面写班级

- 学生名字一律只显示名字（老号 ks232张三 显示成 张三），顶栏、首页问候、悬停提示、请假名单、比赛成绩表都一样
- 全服 / 年级排名、全部提交、几个班同时举手时，名字后面淡写班级；提交列表的名字列窄，只写班号（陈长 258）
- AI 班级分析点名「要多关心的同学」时不再带 ks 前缀
- 建号查重补漏：同班同名也比真名（加过数字的张三2、编号制老号）；名字自己带数字（王芳1）也认得出被占；
  导入时后端再拦一次同班同名，建号页要等查重结果对上当前名单才能点
- 登录名单换成新接口 /classes/:c/members（名字按界面规则剥，换过班的老号不再露出全名），
  旧接口原样留给上线时还开着旧登录页的机房电脑
- 后台手写老格式 ks232张三 新建用户、没选班时按前缀补班级；PUT /me/profile 只带真名时不再 500

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/web/src/admin/home/index.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import { displayName } from '@oj2/contract'
 import type { DashboardInfo } from '@oj2/contract'
 import { BarElement, CategoryScale, Chart as ChartJS, LinearScale, Tooltip } from 'chart.js'
 import { useThemeVars } from 'naive-ui'
@@ -146,7 +147,7 @@ onUnmounted(stopRolling)
 </script>
 
 <template>
-  <PageHeader :title="`你好，${userStore.user?.username ?? '管理员'}`" />
+  <PageHeader :title="`你好，${userStore.user ? displayName(userStore.user.username) : '管理员'}`" />
 
   <div v-if="info" class="tiles">
     <div class="tile">

apps/web/src/admin/user/generate.vue

@@ -86,25 +86,36 @@ const duplicates = computed(() => {
 // 这个班已经有的同名账号（老号按剥掉 ks 前缀的名字比），顺带拿回每个名字会建成的用户名：停手半秒再去查
 const existing = ref<{ name: string; username: string; createTime: string | null }[]>([])
 const checking = ref(false)
+/** 查重结果对应的是哪一份「班级 + 名单」：和眼前的对不上（刚改过、还在防抖）就不让建 */
+const inputKey = computed(() => `${klass.value}\n${names.value.join('\n')}`)
+const checkedKey = ref('')
+// 改得快时前一次请求可能后回来，只认最后发出去的那次
+let checkSeq = 0
 watchDebounced(
-  () => `${klass.value}\n${names.value.join('\n')}`,
-  async () => {
+  inputKey,
+  async (key) => {
+    const seq = ++checkSeq
     const list = [...new Set(names.value)]
     if (!list.length || !klass.value || list.length > 500) {
       existing.value = []
       suggested.value = new Map()
+      checkedKey.value = ''
       return
     }
     checking.value = true
     try {
       const res = await checkUsernames(klass.value, list)
+      if (seq !== checkSeq) return
       existing.value = res.existing
       suggested.value = new Map(list.map((name, i) => [name, res.usernames[i] ?? name]))
+      checkedKey.value = key
     } catch {
+      if (seq !== checkSeq) return
       existing.value = []
       suggested.value = new Map()
+      checkedKey.value = ''
     } finally {
-      checking.value = false
+      if (seq === checkSeq) checking.value = false
     }
   },
   { debounce: 500, immediate: true },
@@ -112,7 +123,7 @@ watchDebounced(
 
 const tooMany = computed(() => rows.value.length > 500)
 const issueCount = computed(() => (classError.value ? 1 : 0) + duplicates.value.length + existing.value.length + (tooMany.value ? 1 : 0))
-const canSubmit = computed(() => rows.value.length > 0 && !issueCount.value && !checking.value && !!klass.value)
+const canSubmit = computed(() => rows.value.length > 0 && !issueCount.value && !checking.value && !!klass.value && checkedKey.value === inputKey.value)
 
 // ---------------------------------------------------------------- 建号
 
@@ -220,7 +231,7 @@ body{margin:12mm;font-family:"Microsoft YaHei","PingFang SC",sans-serif}
       <template v-if="rows.length">
         <div class="head">
           <b>会建这 {{ rows.length }} 个账号</b>
-          <n-tag v-if="!issueCount && !checking && klass" type="success" :bordered="false" round> 没有重名 </n-tag>
+          <n-tag v-if="!issueCount && !checking && klass && checkedKey === inputKey" type="success" :bordered="false" round> 没有重名 </n-tag>
           <n-tag v-if="issueCount" type="warning" :bordered="false" round> 有 {{ issueCount }} 处要先改 </n-tag>
         </div>
 

apps/web/src/admin/user/list.vue

@@ -13,7 +13,7 @@ import UserNameCell from './components/UserNameCell.vue'
 import PasswordCell from './components/PasswordCell.vue'
 import { PROBLEM_PERMISSION, USER_TYPE } from 'utils/constants'
 import { useRouteQuery } from '@vueuse/router'
-import { NO_CLASS, STUDENT_ROLES, type ImportUsersRequest } from '@oj2/contract'
+import { legacyClassOf, NO_CLASS, STUDENT_ROLES, type ImportUsersRequest } from '@oj2/contract'
 import { downloadAccountsCsv } from './accountsCsv'
 import { classLabel, groupClassOptions } from 'utils/classes'
 import { useConfigStore } from 'shared/store/config'
@@ -315,10 +315,21 @@ async function handleEditUser() {
   }
   // http 拦截器只对 login-required / permission-denied 自动弹提示，
   // 其余业务错误（比如班级号位数不对）不接住就什么都不显示
+  if (create.value && !userEditing.value.className && legacyClassOf(userEditing.value.username) === undefined) {
+    message.error('用户名里 ks 后面的班级号位数不对，班级号要是 3～4 位数字')
+    return
+  }
   try {
     if (create.value) {
       const newUser: ImportUsersRequest['users'] = [
-        [userEditing.value.username, password.value, userEditing.value.email ?? '', userEditing.value.realName ?? '', userEditing.value.className],
+        [
+          userEditing.value.username,
+          password.value,
+          userEditing.value.email ?? '',
+          userEditing.value.realName ?? '',
+          // 没选班、但手写的是老格式 ks232张三：按前缀补上班级
+          userEditing.value.className ?? legacyClassOf(userEditing.value.username) ?? null,
+        ],
       ]
       await importUsers(newUser)
       listUsers()