feat: 初始化 ChatOne 管理后台前端

基于 React + Vite + Ant Design Pro 搭建登录、动态菜单、布局主题与数据总览，并补充按菜单整理的 UI 设计稿。

Co-authored-by: Cursor <cursoragent@cursor.com>

src/pages/dashboard/mock.ts

@@ -0,0 +1,90 @@
+export interface OverviewStat {
+  key: string;
+  title: string;
+  value: string;
+  trend: number;
+  icon: 'message' | 'token' | 'user' | 'api';
+}
+
+export interface TrendPoint {
+  date: string;
+  value: number;
+}
+
+export interface ModelShare {
+  type: string;
+  value: number;
+}
+
+export interface AlertItem {
+  id: string;
+  type: string;
+  content: string;
+  level: '高' | '中' | '低';
+  time: string;
+  status: '未恢复' | '已恢复';
+}
+
+export interface TopModel {
+  name: string;
+  percent: number;
+}
+
+export const overviewStats: OverviewStat[] = [
+  { key: 'messages', title: '今日消息', value: '128,560', trend: 12.5, icon: 'message' },
+  { key: 'tokens', title: 'Token消耗', value: '2.46亿', trend: 8.7, icon: 'token' },
+  { key: 'users', title: '活跃用户', value: '18,320', trend: 5.2, icon: 'user' },
+  { key: 'success', title: '接口成功率', value: '99.23%', trend: 0.1, icon: 'api' },
+];
+
+export const conversationTrend: TrendPoint[] = [
+  { date: '05-10', value: 98000 },
+  { date: '05-11', value: 112000 },
+  { date: '05-12', value: 105000 },
+  { date: '05-13', value: 128000 },
+  { date: '05-14', value: 141000 },
+  { date: '05-15', value: 136000 },
+  { date: '05-16', value: 152000 },
+];
+
+export const modelShare: ModelShare[] = [
+  { type: 'GPT', value: 42 },
+  { type: 'Claude', value: 27 },
+  { type: '通义', value: 19 },
+  { type: '其他', value: 12 },
+];
+
+export const alertList: AlertItem[] = [
+  {
+    id: '1',
+    type: '接口错误',
+    content: '模型服务超时：GPT-4o',
+    level: '高',
+    time: '2024-05-16 10:21:35',
+    status: '未恢复',
+  },
+  {
+    id: '2',
+    type: '限流告警',
+    content: 'Claude-3.5 请求限流',
+    level: '中',
+    time: '2024-05-16 09:47:12',
+    status: '未恢复',
+  },
+  {
+    id: '3',
+    type: '服务降级',
+    content: '向量库服务降级运行',
+    level: '中',
+    time: '2024-05-16 08:33:09',
+    status: '已恢复',
+  },
+];
+
+export const topModels: TopModel[] = [
+  { name: 'GPT-4o', percent: 42.35 },
+  { name: 'Claude-3.5-Sonnet', percent: 27.46 },
+  { name: '通义千问-Max', percent: 18.91 },
+  { name: 'GPT-4 Turbo', percent: 7.65 },
+  { name: '其他', percent: 3.63 },
+];