feat(web): AI 管理端 3 页面 — Prompt/分析历史/用量统计

- API 封装: prompts.ts / analysis.ts / usage.ts
- AiPromptList: CRUD + 激活/回滚 + AuthButton 权限
- AiAnalysisList: 历史列表 + 行展开查看结果
- AiUsageDashboard: 总次数/类型分布统计卡片
- 菜单注册 + 路由配置 (MainLayout + App.tsx)

apps/web/src/api/ai/prompts.ts

@@ -0,0 +1,45 @@
+import client from '../client';
+import type { PaginatedResponse } from '../types';
+
+export interface PromptItem {
+  id: string;
+  name: string;
+  description: string;
+  system_prompt: string;
+  user_prompt_template: string;
+  model_config: Record<string, unknown>;
+  version: number;
+  is_active: boolean;
+  category: string;
+  tags: Record<string, unknown> | null;
+  created_at: string;
+  updated_at: string;
+}
+
+export interface CreatePromptReq {
+  name: string;
+  description?: string;
+  system_prompt: string;
+  user_prompt_template: string;
+  model_config: Record<string, unknown>;
+  category: string;
+}
+
+export const promptApi = {
+  list: async (params?: { category?: string; page?: number; page_size?: number }) => {
+    const resp = await client.get('/ai/prompts', { params });
+    return resp.data.data as PaginatedResponse<PromptItem>;
+  },
+  create: async (data: CreatePromptReq) => {
+    const resp = await client.post('/ai/prompts', data);
+    return resp.data.data as PromptItem;
+  },
+  activate: async (id: string) => {
+    const resp = await client.post(`/ai/prompts/${id}/activate`);
+    return resp.data.data as PromptItem;
+  },
+  rollback: async (id: string) => {
+    const resp = await client.post(`/ai/prompts/${id}/rollback`);
+    return resp.data.data as PromptItem;
+  },
+};