chore(站内信): 消息页、后台空壳页、两个接口和 message 表一起下线

历史上一共 6 条站内信（最后一条 2025-06），发信接口两代前端都没接过，后台页面只有一句
「未完待续」，OJ2 顶栏也没有入口。

0033 是 DROP TABLE，部署要显式放行：OJ2_ALLOW_DESTRUCTIVE=1 docker/deploy.sh，
或 CI 手工触发时勾 allow_destructive。

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

apps/web/src/oj/api.ts

@@ -57,7 +57,6 @@ import type {
   Announcement,
   AnnouncementListItem,
   Profile,
-  Message,
   SubmissionListItem,
   Exercise,
   ProblemDetail,
@@ -380,13 +379,6 @@ export function getAnnouncement(id: number) {
   return api.get<Announcement>(`announcements/${id}`)
 }
 
-export function getMessageList(offset = 0, limit = 10) {
-  // language 的收窄同 getSubmissions，见那里的说明
-  return api.get<{ results: Message[]; total: number }>("messages", {
-    params: { limit, offset },
-  })
-}
-
 export function getReaction(problemID: number) {
   return api.get<ReactionState>(`problems/${problemID}/reaction`)
 }

apps/web/src/oj/user/message.vue

@@ -1,78 +0,0 @@
-<template>
-  <div class="oj-page message-page">
-    <h2>消息</h2>
-    <n-list v-if="messages.length">
-      <n-list-item :style="{ overflow: 'auto' }" v-for="(item, index) in messages" :key="index">
-        <n-flex size="large" vertical>
-          <n-flex align="center">
-            <div>发送时间</div>
-            <div>{{ parseTime(item.createTime, "YYYY年M月D日 HH:mm:ss") }}</div>
-            <div>发送者</div>
-            <div>{{ item.sender.username }}</div>
-          </n-flex>
-          <n-flex align="center">
-            <div>题目序号</div>
-            <n-button
-              text
-              type="info"
-              @click="router.push('/problem/' + item.submission.problemDisplayId)"
-            >
-              {{ item.submission.problemDisplayId }}
-            </n-button>
-            <n-text :type="JUDGE_STATUS[item.submission.result]['type']">
-              {{ JUDGE_STATUS[item.submission.result]["name"] }}
-            </n-text>
-            <Copy :value="item.submission.code" />
-          </n-flex>
-          <n-code
-            :language="LANGUAGE_FORMAT_VALUE[item.submission.language]"
-            :code="item.submission.code"
-            show-line-numbers
-          />
-          <div v-html="item.message"></div>
-        </n-flex>
-      </n-list-item>
-    </n-list>
-    <n-empty v-else description="没有消息" style="margin: 48px 0"></n-empty>
-    <Pagination v-model:limit="query.limit" v-model:page="query.page" :total="total" />
-  </div>
-</template>
-<script lang="ts" setup>
-import { getMessageList } from "oj/api"
-import { JUDGE_STATUS, LANGUAGE_FORMAT_VALUE } from "utils/constants"
-import Copy from "shared/components/Copy.vue"
-import Pagination from "shared/components/Pagination.vue"
-import { parseTime } from "utils/functions"
-import type { Message } from "utils/types"
-
-const router = useRouter()
-const messages = ref<Message[]>([])
-const total = ref(0)
-
-const query = reactive({
-  limit: 10,
-  page: 1,
-})
-
-async function listMessages() {
-  const offset = (query.page - 1) * query.limit
-  const res = await getMessageList(offset, query.limit)
-  total.value = res.total
-  messages.value = res.results
-}
-
-onMounted(listMessages)
-watch(query, listMessages, { deep: true })
-</script>
-
-<style scoped>
-.message-page h2 {
-  margin: 0 0 8px;
-  font-size: var(--oj-fs-title);
-}
-
-.message-page :deep(.n-list-item) {
-  padding: 20px 0;
-  font-size: var(--oj-fs-sec);
-}
-</style>