refactor: 后端从 Django 换成 Bun + SQLite

Django 多个 worker 内存占用 1-2 GB，换成 Bun 单进程后约 25 MB，
同时去掉 Postgres 和 Redis，只剩 Caddy + Bun 两个容器。

- server/：Hono + bun:sqlite + Bun 原生 WebSocket，接口与原 django-ninja
  保持兼容；表结构、时间/UUID 存储格式、密码哈希与 Django 一致，旧数据可直接使用
- 评分加权、贝叶斯平滑、成绩册的计算结果与原实现逐位一致（复刻 Python round/sum）
- scripts/：Postgres → SQLite 迁移、新建超管、提示词层级标注、重算分数
- 前端：Django Admin 去掉后，用户新建/修改改为页面内弹窗；
  非超管的挑战公开按钮置灰
- 权限不足返回 JSON 403（原来是重定向到不存在的登录页）
- docker-compose / Caddyfile / dev.sh / CLAUDE.md 更新，删除 AGENTS.md
- 服务器切换步骤见 docs/migrate-to-bun.md

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

client/src/api.ts

@@ -82,6 +82,29 @@ export const Account = {
     return res.data
   },
 
+  async create(payload: {
+    username: string
+    password: string
+    role: string
+    classname: string
+  }) {
+    const res = await http.post("/account/create", payload)
+    return res.data
+  },
+
+  async update(
+    id: number,
+    payload: {
+      username?: string
+      password?: string
+      role?: string
+      classname?: string
+    },
+  ) {
+    const res = await http.put(`/account/${id}`, payload)
+    return res.data
+  },
+
   async toggleActive(id: number) {
     const res = await http.put(`/account/active/${id}`)
     return res.data

client/src/components/dashboard/UserActions.vue

@@ -19,13 +19,19 @@
     >
       解封
     </n-button>
+    <UserFormModal
+      v-model:show="showEdit"
+      :user="user"
+      @saved="emits('reload')"
+    />
   </n-flex>
 </template>
 <script lang="ts" setup>
+import { ref } from "vue"
 import { useMessage } from "naive-ui"
 import { Account } from "../../api"
-import { ADMIN_URL } from "../../utils/const"
 import { Role, type User } from "../../utils/type"
+import UserFormModal from "./UserFormModal.vue"
 
 interface Props {
   user: User
@@ -35,9 +41,10 @@ const props = defineProps<Props>()
 const emits = defineEmits(["reload"])
 
 const message = useMessage()
+const showEdit = ref(false)
 
 function edit() {
-  window.open(`${ADMIN_URL}/account/user/${props.user.id}/change/`)
+  showEdit.value = true
 }
 
 async function toggleUserActive() {

client/src/components/dashboard/UserFormModal.vue

@@ -0,0 +1,95 @@
+<template>
+  <n-modal
+    style="width: 360px"
+    :mask-closable="false"
+    preset="card"
+    :title="user ? `修改 ${user.username}` : '新建用户'"
+    :show="show"
+    @update:show="emit('update:show', $event)"
+  >
+    <n-form label-placement="left" label-width="60">
+      <n-form-item label="用户名">
+        <n-input v-model:value="form.username" />
+      </n-form-item>
+      <n-form-item label="密码">
+        <n-input
+          v-model:value="form.password"
+          :placeholder="user ? '不修改请留空' : '6 到 20 位'"
+        />
+      </n-form-item>
+      <n-form-item label="权限">
+        <n-select v-model:value="form.role" :options="roles" />
+      </n-form-item>
+      <n-form-item label="班级">
+        <n-input v-model:value="form.classname" placeholder="可不填" />
+      </n-form-item>
+    </n-form>
+    <n-button
+      type="primary"
+      block
+      :loading="loading"
+      :disabled="!form.username || (!user && !form.password)"
+      @click="submit"
+    >
+      保存
+    </n-button>
+  </n-modal>
+</template>
+<script lang="ts" setup>
+import { reactive, ref, watch } from "vue"
+import { useMessage } from "naive-ui"
+import { Account } from "../../api"
+import { Role, type User } from "../../utils/type"
+
+const props = defineProps<{ show: boolean; user?: User | null }>()
+const emit = defineEmits(["update:show", "saved"])
+
+const message = useMessage()
+const loading = ref(false)
+const form = reactive({
+  username: "",
+  password: "",
+  role: Role.Normal,
+  classname: "",
+})
+
+const roles = [
+  { label: "普通用户", value: Role.Normal },
+  { label: "管理员", value: Role.Admin },
+]
+
+watch(
+  () => props.show,
+  (show) => {
+    if (!show) return
+    form.username = props.user?.username ?? ""
+    form.password = ""
+    form.role = props.user?.role ?? Role.Normal
+    form.classname = props.user?.classname ?? ""
+  },
+)
+
+async function submit() {
+  loading.value = true
+  try {
+    const data = props.user
+      ? await Account.update(props.user.id, {
+          username: form.username,
+          role: form.role,
+          classname: form.classname,
+          ...(form.password ? { password: form.password } : {}),
+        })
+      : await Account.create({ ...form })
+    message.success(data.message)
+    emit("update:show", false)
+    emit("saved")
+  } catch (err: any) {
+    const detail = err.response?.data?.detail
+    message.error(
+      typeof detail === "string" ? detail : (detail?.[0]?.msg ?? "保存失败"),
+    )
+  } finally {
+    loading.value = false
+  }
+}
+</script>

client/src/components/editor/Toolbar.vue

@@ -29,20 +29,13 @@
 <script lang="ts" setup>
 import { computed, h } from "vue"
 import { Icon } from "@iconify/vue"
-import {
-  authed,
-  roleAdmin,
-  roleNormal,
-  roleSuper,
-  user,
-} from "../../store/user"
+import { authed, roleAdmin, roleNormal, user } from "../../store/user"
 import { loginModal } from "../../store/modal"
 import { show, panelSize } from "../../store/panel"
 import { taskId } from "../../store/task"
 import { Account } from "../../api"
 import { Role } from "../../utils/type"
 import { router } from "../../router"
-import { ADMIN_URL } from "../../utils/const"
 
 const props = defineProps<{
   submitLoading: boolean
@@ -64,16 +57,6 @@ const menu = computed(() => [
         width: 20,
       }),
   },
-  {
-    label: "数据管理",
-    key: "admin",
-    show: roleSuper.value,
-    icon: () =>
-      h(Icon, {
-        icon: "skill-icons:django",
-        width: 20,
-      }),
-  },
   {
     label: "我的提交",
     key: "submissions",
@@ -106,9 +89,6 @@ function clickMenu(name: string) {
       router.push({ name: route, params: { display: 0 } })
       break
     }
-    case "admin":
-      window.open(ADMIN_URL)
-      break
     case "submissions":
       router.push({
         name: "submissions",

client/src/env.d.ts

@@ -1,7 +1,6 @@
 interface ImportMetaEnv {
   readonly PUBLIC_WEB_URL: string
   readonly PUBLIC_BASE_URL: string
-  readonly PUBLIC_ADMIN_URL: string
   readonly PUBLIC_MAXKB_URL: string
   readonly PUBLIC_ICONIFY_URL: string
   readonly PUBLIC_WS_URL: string

client/src/pages/ChallengeEditor.vue

@@ -17,7 +17,11 @@
         >
           <template #header>
             <n-flex align="center">
-              <n-button text @click.stop="togglePublic(item.display)">
+              <n-button
+                text
+                :disabled="!roleSuper"
+                @click.stop="togglePublic(item.display)"
+              >
                 <Icon
                   width="24"
                   :icon="
@@ -29,7 +33,9 @@
               </n-button>
               <span>【{{ item.display }}】{{ item.title }}</span>
               <n-tag size="small" type="warning">{{ item.score }}分</n-tag>
-              <n-tag size="small">出题人 {{ item.author_name || "未设置" }}</n-tag>
+              <n-tag size="small"
+                >出题人 {{ item.author_name || "未设置" }}</n-tag
+              >
             </n-flex>
           </template>
           <template #header-extra>
@@ -111,9 +117,15 @@
       :autosize="{ minRows: 10, maxRows: 30 }"
     />
     <n-flex v-if="splitResult" style="margin-top: 8px">
-      <n-tag size="small" type="success">HTML · {{ splitResult.html.length }} 字符</n-tag>
-      <n-tag size="small" type="info">CSS · {{ splitResult.css.length }} 字符</n-tag>
-      <n-tag size="small" type="warning">JS · {{ splitResult.js.length }} 字符</n-tag>
+      <n-tag size="small" type="success"
+        >HTML · {{ splitResult.html.length }} 字符</n-tag
+      >
+      <n-tag size="small" type="info"
+        >CSS · {{ splitResult.css.length }} 字符</n-tag
+      >
+      <n-tag size="small" type="warning"
+        >JS · {{ splitResult.js.length }} 字符</n-tag
+      >
     </n-flex>
   </n-modal>
 </template>
@@ -122,6 +134,7 @@ import { computed, onMounted, reactive, ref, watch } from "vue"
 import { useRoute, useRouter } from "vue-router"
 import { Icon } from "@iconify/vue"
 import { Challenge } from "../api"
+import { roleSuper } from "../store/user"
 import type { ChallengeSlim } from "../utils/type"
 import { useDialog, useMessage } from "naive-ui"
 import MarkdownEditor from "../components/dashboard/MarkdownEditor.vue"
@@ -177,9 +190,11 @@ watch(rawCode, (val) => {
 watch(showExampleModal, (visible) => {
   if (!visible) return
   const parts: string[] = []
-  if (challenge.example_css) parts.push(`<style>\n${challenge.example_css}\n</style>`)
+  if (challenge.example_css)
+    parts.push(`<style>\n${challenge.example_css}\n</style>`)
   if (challenge.example_html) parts.push(challenge.example_html)
-  if (challenge.example_js) parts.push(`<script>\n${challenge.example_js}\n<\/script>`)
+  if (challenge.example_js)
+    parts.push(`<script>\n${challenge.example_js}\n<\/script>`)
   rawCode.value = parts.join("\n\n")
 })
 const challenge = reactive({

client/src/pages/UserManage.vue

@@ -15,7 +15,7 @@
           :options="roles"
         />
       </div>
-      <n-button @click="goDjangoUserAdd">新建一个</n-button>
+      <n-button @click="showCreate = true">新建一个</n-button>
       <n-button @click="showBatch = true">批量新建</n-button>
       <n-pagination
         v-model:page="query.page"
@@ -25,6 +25,7 @@
       />
     </n-flex>
     <n-data-table striped :columns="columns" :data="users"></n-data-table>
+    <UserFormModal v-model:show="showCreate" @saved="init" />
     <n-modal
       style="width: 300px"
       :mask-closable="false"
@@ -62,8 +63,8 @@ import { Account } from "../api"
 import { parseTime } from "../utils/helper"
 import { useMessage, type DataTableColumn } from "naive-ui"
 import { getRole, Role, type User } from "../utils/type"
-import { ADMIN_URL } from "../utils/const"
 import UserActions from "../components/dashboard/UserActions.vue"
+import UserFormModal from "../components/dashboard/UserFormModal.vue"
 import { useRoute, useRouter } from "vue-router"
 import { watchDebounced } from "@vueuse/core"
 
@@ -78,6 +79,7 @@ const query = reactive({
   role: "",
 })
 const showBatch = ref(false)
+const showCreate = ref(false)
 const classname = ref("")
 const namesStr = ref("")
 const names = computed(() => namesStr.value.split("\n").filter((it) => !!it))
@@ -113,6 +115,10 @@ const columns: DataTableColumn<User>[] = [
         ? parseTime(row.last_login, "YYYY-MM-DD HH:mm:ss")
         : "从未登录",
   },
+  {
+    title: "班级",
+    key: "classname",
+  },
   {
     title: "权限",
     key: "role",
@@ -125,10 +131,6 @@ const columns: DataTableColumn<User>[] = [
   },
 ]
 
-function goDjangoUserAdd() {
-  window.open(`${ADMIN_URL}/account/user/add/`)
-}
-
 async function batchCreateUsers() {
   if (!names.value.length) return
   try {
@@ -145,7 +147,7 @@ async function batchCreateUsers() {
     init()
   } catch (err: any) {
     batchLoading.value = false
-    message.error(err.detail ?? "批量创建失败")
+    message.error(err.response?.data?.detail ?? "批量创建失败")
   }
 }
 

client/src/utils/const.ts

@@ -35,8 +35,6 @@ export const STORAGE_KEY = {
   FONTSIZE: "web-fontsize",
 }
 
-export const ADMIN_URL = import.meta.env.PUBLIC_ADMIN_URL
-
 export const BASE_URL = import.meta.env.PUBLIC_BASE_URL
 
 export const WS_BASE_URL =

client/src/utils/type.ts

@@ -124,6 +124,7 @@ export interface User {
   date_joined: Date
   last_login: Date
   role: Role
+  classname: string
   is_active: boolean
 }