feat(achievement): 添加管理后台成就配置页

指标下拉框由后端 METRIC_REGISTRY 动态提供，选中后显示该指标的说明。
列表显示已解锁人数——阈值配错时学生永远拿不到也永远不会来问，
这个计数器是唯一的仪表盘。

API 追加到 src/admin/api.ts（仓库的 admin 接口集中在这一个文件里），
路由 meta 用 requiresSuperAdmin 以匹配后端的 super_admin_required。

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/admin/achievement/components/AchievementModal.vue

@@ -0,0 +1,160 @@
+<script setup lang="ts">
+import {
+  createAchievement,
+  getMetricOptions,
+  updateAchievement,
+  type AdminAchievement,
+  type MetricOption,
+} from "admin/api"
+
+const props = defineProps<{
+  show: boolean
+  editing: AdminAchievement | null
+}>()
+const emit = defineEmits<{ "update:show": [boolean]; saved: [] }>()
+
+const message = useMessage()
+const metrics = ref<MetricOption[]>([])
+const saving = ref(false)
+
+function emptyForm() {
+  return {
+    name: "",
+    description: "",
+    icon: "🏆",
+    rarity: "bronze",
+    hidden: false,
+    metric: "",
+    operator: "gte" as "gte" | "lte",
+    threshold: 1,
+    visible: true,
+    order: 0,
+  }
+}
+
+const form = ref(emptyForm())
+
+const metricOptions = computed(() =>
+  metrics.value.map((m) => ({ label: `${m.name}（${m.key}）`, value: m.key })),
+)
+
+const metricHelp = computed(
+  () => metrics.value.find((m) => m.key === form.value.metric)?.help_text ?? "",
+)
+
+watch(
+  () => props.show,
+  async (show) => {
+    if (!show) return
+    if (!metrics.value.length) {
+      const res = await getMetricOptions()
+      metrics.value = res.data
+    }
+    if (props.editing) {
+      form.value = { ...emptyForm(), ...props.editing }
+    } else {
+      form.value = { ...emptyForm(), metric: metrics.value[0]?.key ?? "" }
+    }
+  },
+)
+
+async function save() {
+  if (!form.value.name || !form.value.metric) {
+    message.error("名称和指标不能为空")
+    return
+  }
+  saving.value = true
+  try {
+    if (props.editing) {
+      await updateAchievement({ ...form.value, id: props.editing.id })
+    } else {
+      await createAchievement(form.value)
+    }
+    message.success("保存成功")
+    emit("update:show", false)
+    emit("saved")
+  } finally {
+    saving.value = false
+  }
+}
+</script>
+
+<template>
+  <n-modal
+    :show="show"
+    preset="card"
+    style="width: 560px"
+    :title="editing ? '编辑成就' : '新建成就'"
+    @update:show="emit('update:show', $event)"
+  >
+    <n-form label-placement="left" :label-width="80">
+      <n-form-item label="名称" required>
+        <n-input v-model:value="form.name" placeholder="成就名称" />
+      </n-form-item>
+      <n-form-item label="描述" required>
+        <n-input
+          v-model:value="form.description"
+          type="textarea"
+          placeholder="达成条件的描述，展示给学生看"
+        />
+      </n-form-item>
+      <n-form-item label="图标">
+        <n-input v-model:value="form.icon" placeholder="emoji，例如 🦉" />
+      </n-form-item>
+      <n-form-item label="稀有度">
+        <n-select
+          v-model:value="form.rarity"
+          :options="[
+            { label: '青铜', value: 'bronze' },
+            { label: '白银', value: 'silver' },
+            { label: '黄金', value: 'gold' },
+            { label: '白金', value: 'platinum' },
+          ]"
+        />
+      </n-form-item>
+      <n-form-item label="指标" required>
+        <n-select
+          v-model:value="form.metric"
+          :options="metricOptions"
+          filterable
+        />
+      </n-form-item>
+      <n-form-item v-if="metricHelp" label=" ">
+        <n-text depth="3">{{ metricHelp }}</n-text>
+      </n-form-item>
+      <n-form-item label="条件">
+        <n-flex align="center">
+          <n-select
+            v-model:value="form.operator"
+            style="width: 130px"
+            :options="[
+              { label: '大于等于', value: 'gte' },
+              { label: '小于等于', value: 'lte' },
+            ]"
+          />
+          <n-input-number v-model:value="form.threshold" :min="0" />
+        </n-flex>
+      </n-form-item>
+      <n-form-item label="隐藏成就">
+        <n-switch v-model:value="form.hidden" />
+        <n-text depth="3" style="margin-left: 12px">
+          未解锁时学生只能看到 ???
+        </n-text>
+      </n-form-item>
+      <n-form-item label="上架">
+        <n-switch v-model:value="form.visible" />
+      </n-form-item>
+      <n-form-item label="排序">
+        <n-input-number v-model:value="form.order" />
+      </n-form-item>
+    </n-form>
+    <template #footer>
+      <n-flex justify="end">
+        <n-button @click="emit('update:show', false)">取消</n-button>
+        <n-button type="primary" :loading="saving" @click="save">
+          保存
+        </n-button>
+      </n-flex>
+    </template>
+  </n-modal>
+</template>

src/admin/achievement/list.vue

@@ -0,0 +1,135 @@
+<script setup lang="ts">
+import { NButton, NFlex } from "naive-ui"
+import {
+  deleteAchievement,
+  getAdminAchievements,
+  type AdminAchievement,
+} from "admin/api"
+import AchievementModal from "./components/AchievementModal.vue"
+
+const message = useMessage()
+const dialog = useDialog()
+
+const list = ref<AdminAchievement[]>([])
+const loading = ref(false)
+const showModal = ref(false)
+const editing = ref<AdminAchievement | null>(null)
+
+const RARITY_LABEL: Record<string, string> = {
+  bronze: "青铜",
+  silver: "白银",
+  gold: "黄金",
+  platinum: "白金",
+}
+
+async function load() {
+  loading.value = true
+  try {
+    const res = await getAdminAchievements()
+    list.value = res.data
+  } finally {
+    loading.value = false
+  }
+}
+
+function create() {
+  editing.value = null
+  showModal.value = true
+}
+
+function edit(row: AdminAchievement) {
+  editing.value = row
+  showModal.value = true
+}
+
+function remove(row: AdminAchievement) {
+  dialog.warning({
+    title: "删除成就",
+    content: `确定删除「${row.name}」？已解锁记录会一并删除。`,
+    positiveText: "删除",
+    negativeText: "取消",
+    onPositiveClick: async () => {
+      await deleteAchievement(row.id)
+      message.success("已删除")
+      load()
+    },
+  })
+}
+
+const columns: DataTableColumn<AdminAchievement>[] = [
+  { title: "图标", key: "icon", width: 60 },
+  { title: "名称", key: "name" },
+  {
+    title: "稀有度",
+    key: "rarity",
+    width: 90,
+    render: (row) => RARITY_LABEL[row.rarity] ?? row.rarity,
+  },
+  { title: "指标", key: "metric_name" },
+  {
+    title: "条件",
+    key: "threshold",
+    width: 110,
+    render: (row) => `${row.operator === "gte" ? "≥" : "≤"} ${row.threshold}`,
+  },
+  {
+    title: "隐藏",
+    key: "hidden",
+    width: 70,
+    render: (row) => (row.hidden ? "是" : "—"),
+  },
+  {
+    title: "上架",
+    key: "visible",
+    width: 70,
+    render: (row) => (row.visible ? "是" : "否"),
+  },
+  { title: "已解锁人数", key: "unlock_count", width: 110 },
+  {
+    title: "操作",
+    key: "actions",
+    width: 130,
+    render: (row) =>
+      h(NFlex, { size: 8 }, () => [
+        h(
+          NButton,
+          { text: true, type: "primary", onClick: () => edit(row) },
+          () => "编辑",
+        ),
+        h(
+          NButton,
+          { text: true, type: "error", onClick: () => remove(row) },
+          () => "删除",
+        ),
+      ]),
+  },
+]
+
+onMounted(load)
+</script>
+
+<template>
+  <n-card title="成就管理">
+    <template #header-extra>
+      <n-button type="primary" @click="create">新建成就</n-button>
+    </template>
+
+    <n-alert type="info" style="margin-bottom: 12px">
+      「已解锁人数」是唯一的仪表盘：配置一周后仍为
+      0，多半是阈值配错了而不是太难。
+    </n-alert>
+
+    <n-data-table
+      :loading="loading"
+      :data="list"
+      :columns="columns"
+      :row-key="(row: AdminAchievement) => row.id"
+    />
+
+    <AchievementModal
+      v-model:show="showModal"
+      :editing="editing"
+      @saved="load"
+    />
+  </n-card>
+</template>

src/admin/api.ts

@@ -531,3 +531,48 @@ export function pinAIReport(id: number) {
 export function getPinnedAIReports() {
   return http.get("admin/ai/reports", { params: { pinned_only: "true" } })
 }
+
+// ==================== 成就 ====================
+
+export interface AdminAchievement {
+  id: number
+  name: string
+  description: string
+  icon: string
+  rarity: string
+  hidden: boolean
+  metric: string
+  metric_name: string
+  operator: "gte" | "lte"
+  threshold: number
+  visible: boolean
+  unlock_count: number
+  order: number
+  create_time: string
+}
+
+export interface MetricOption {
+  key: string
+  name: string
+  help_text: string
+}
+
+export function getAdminAchievements() {
+  return http.get<AdminAchievement[]>("admin/achievement")
+}
+
+export function getMetricOptions() {
+  return http.get<MetricOption[]>("admin/achievement/metrics")
+}
+
+export function createAchievement(data: Partial<AdminAchievement>) {
+  return http.post<AdminAchievement>("admin/achievement", data)
+}
+
+export function updateAchievement(data: Partial<AdminAchievement>) {
+  return http.put<AdminAchievement>("admin/achievement", data)
+}
+
+export function deleteAchievement(id: number) {
+  return http.delete("admin/achievement", { params: { id } })
+}

src/routes.ts

@@ -301,6 +301,14 @@ export const admins: RouteRecordRaw = {
       component: () => import("admin/problemset/list.vue"),
       meta: { requiresTeacherAdmin: true },
     },
+    {
+      path: "achievement/list",
+      name: "admin achievement list",
+      // 后端 admin 接口是 super_admin_required，这里必须跟着用
+      // requiresSuperAdmin，否则教师能进页面但每个请求都 403
+      component: () => import("admin/achievement/list.vue"),
+      meta: { requiresSuperAdmin: true },
+    },
     {
       path: "problemset/create",
       name: "admin problemset create",

src/shared/layout/admin.vue

@@ -141,6 +141,15 @@ const options = computed<MenuOption[]>(() => {
           ),
         key: "admin tutorial list",
       },
+      {
+        label: () =>
+          h(
+            RouterLink,
+            { to: "/admin/achievement/list" },
+            { default: () => "成就" },
+          ),
+        key: "admin achievement list",
+      },
       {
         label: () =>
           h(