feat(admin): 新增数据管理模块，支持分类清空系统数据

添加 purge API 支持按类别清空配置、用户、使用记录、审计日志、请求体和统计数据，
前端系统设置页新增数据管理区块。

frontend/src/api/admin.ts

@@ -448,6 +448,11 @@ export interface ApiKeyLockResponse {
   message: string
 }
 
+async function purge<T>(target: string): Promise<T> {
+  const response = await apiClient.post<T>(`/api/admin/system/purge/${target}`)
+  return response.data
+}
+
 // 管理员API密钥管理相关API
 export const adminApi = {
   // 获取所有独立余额Keys列表
@@ -850,6 +855,14 @@ export const adminApi = {
     return response.data
   },
 
+  // 数据清空
+  purgeConfig: () => purge<{ message: string; deleted: Record<string, number> }>('config'),
+  purgeUsers: () => purge<{ message: string; deleted: Record<string, number> }>('users'),
+  purgeUsage: () => purge<{ message: string; deleted: Record<string, number> }>('usage'),
+  purgeAuditLogs: () => purge<{ message: string; deleted: Record<string, number> }>('audit-logs'),
+  purgeRequestBodies: () => purge<{ message: string; cleaned: Record<string, number> }>('request-bodies'),
+  purgeStats: () => purge<{ message: string }>('stats'),
+
   async getTimeSeries(params?: {
     start_date?: string
     end_date?: string

frontend/src/views/admin/SystemSettings.vue

@@ -39,6 +39,9 @@
             @file-select="handleUsersFileSelect"
           />
 
+          <!-- 数据管理 -->
+          <DataManagementSection id="section-data-mgmt" />
+
           <!-- 网络代理 -->
           <ProxyConfigSection
             id="section-proxy"
@@ -201,6 +204,7 @@ import { useScheduledTasks } from './system-settings/composables/useScheduledTas
 import SiteInfoSection from './system-settings/SiteInfoSection.vue'
 import ConfigManagementSection from './system-settings/ConfigManagementSection.vue'
 import UserDataSection from './system-settings/UserDataSection.vue'
+import DataManagementSection from './system-settings/DataManagementSection.vue'
 import ProxyConfigSection from './system-settings/ProxyConfigSection.vue'
 import BasicConfigSection from './system-settings/BasicConfigSection.vue'
 import RequestLogSection from './system-settings/RequestLogSection.vue'
@@ -219,6 +223,7 @@ const tocItems = [
   { id: 'section-site-info', label: '站点信息' },
   { id: 'section-config-mgmt', label: '配置管理' },
   { id: 'section-user-data', label: '用户数据管理' },
+  { id: 'section-data-mgmt', label: '数据管理' },
   { id: 'section-proxy', label: '网络代理' },
   { id: 'section-basic', label: '基础配置' },
   { id: 'section-request-log', label: '请求记录' },

frontend/src/views/admin/system-settings/DataManagementSection.vue

@@ -0,0 +1,132 @@
+<template>
+  <CardSection
+    title="数据管理"
+    description="清空系统数据，操作不可逆，请谨慎使用"
+  >
+    <div class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-4">
+      <div
+        v-for="item in purgeItems"
+        :key="item.key"
+        class="flex flex-col gap-2 p-4 rounded-lg border border-border"
+      >
+        <div class="flex items-center gap-2">
+          <component
+            :is="item.icon"
+            class="w-4 h-4 text-muted-foreground"
+          />
+          <span class="text-sm font-medium">{{ item.title }}</span>
+        </div>
+        <p class="text-xs text-muted-foreground flex-1">
+          {{ item.description }}
+        </p>
+        <Button
+          variant="destructive"
+          size="sm"
+          class="w-full mt-1"
+          :disabled="loadingKey === item.key"
+          @click="handlePurge(item)"
+        >
+          <Trash2 class="w-3.5 h-3.5 mr-1.5" />
+          {{ loadingKey === item.key ? '清空中...' : item.buttonText }}
+        </Button>
+      </div>
+    </div>
+  </CardSection>
+</template>
+
+<script setup lang="ts">
+import { ref, markRaw, type Component } from 'vue'
+import { Trash2, Settings, Users, BarChart3, Shield, FileText, PieChart } from 'lucide-vue-next'
+import Button from '@/components/ui/button.vue'
+import { CardSection } from '@/components/layout'
+import { adminApi } from '@/api/admin'
+import { useToast } from '@/composables/useToast'
+import { useConfirm } from '@/composables/useConfirm'
+import { parseApiError } from '@/utils/errorParser'
+
+interface PurgeItem {
+  key: string
+  title: string
+  description: string
+  buttonText: string
+  icon: Component
+  confirmMessage: string
+  action: () => Promise<{ message: string }>
+}
+
+const { success, error } = useToast()
+const { confirmDanger } = useConfirm()
+const loadingKey = ref<string | null>(null)
+
+const purgeItems: PurgeItem[] = [
+  {
+    key: 'config',
+    title: '清空配置',
+    description: '删除所有提供商、端点、API Key 和模型配置',
+    buttonText: '清空配置',
+    icon: markRaw(Settings),
+    confirmMessage: '确定要清空所有提供商配置吗？这将删除所有提供商、端点、API Key 和模型配置，操作不可逆。',
+    action: () => adminApi.purgeConfig(),
+  },
+  {
+    key: 'users',
+    title: '清空用户',
+    description: '删除所有非管理员用户及其 API Keys',
+    buttonText: '清空用户',
+    icon: markRaw(Users),
+    confirmMessage: '确定要清空所有非管理员用户吗？管理员账户将被保留，操作不可逆。',
+    action: () => adminApi.purgeUsers(),
+  },
+  {
+    key: 'usage',
+    title: '清空使用记录',
+    description: '删除全部使用记录和请求候选记录',
+    buttonText: '清空记录',
+    icon: markRaw(BarChart3),
+    confirmMessage: '确定要清空全部使用记录吗？所有请求统计数据将被永久删除，操作不可逆。',
+    action: () => adminApi.purgeUsage(),
+  },
+  {
+    key: 'audit-logs',
+    title: '清空审计日志',
+    description: '删除全部审计日志记录',
+    buttonText: '清空日志',
+    icon: markRaw(Shield),
+    confirmMessage: '确定要清空全部审计日志吗？所有安全事件记录将被永久删除，操作不可逆。',
+    action: () => adminApi.purgeAuditLogs(),
+  },
+  {
+    key: 'request-bodies',
+    title: '清空请求体',
+    description: '清空所有请求/响应体数据，保留统计信息',
+    buttonText: '清空请求体',
+    icon: markRaw(FileText),
+    confirmMessage: '确定要清空全部请求体吗？请求/响应内容将被清除，但 token 和成本等统计信息会保留，操作不可逆。',
+    action: () => adminApi.purgeRequestBodies(),
+  },
+  {
+    key: 'stats',
+    title: '清空聚合数据',
+    description: '清空仪表盘统计和聚合数据，保留原始使用记录',
+    buttonText: '清空聚合数据',
+    icon: markRaw(PieChart),
+    confirmMessage: '确定要清空全部聚合统计数据吗？仪表盘数据将被清除，用户和 Key 的累计统计也会归零，操作不可逆。',
+    action: () => adminApi.purgeStats(),
+  },
+]
+
+async function handlePurge(item: PurgeItem) {
+  const confirmed = await confirmDanger(item.confirmMessage, item.title)
+  if (!confirmed) return
+
+  loadingKey.value = item.key
+  try {
+    const result = await item.action()
+    success(result.message)
+  } catch (e) {
+    error(parseApiError(e))
+  } finally {
+    loadingKey.value = null
+  }
+}
+</script>