feat(admin): Admin V2 — Ant Design Pro 纯 SPA 重写

Next.js SSR/hydration 与 SWR fetch-on-mount 存在根本冲突：
hydration 卸载组件时 abort 的请求仍占用后端 DB 连接，
retry 循环耗尽 PostgreSQL 连接池导致后端完全卡死。

admin-v2 使用 Vite + React + antd 纯 SPA 彻底消除此问题：
- 12 页面全部完成（Login, Dashboard, Accounts, Providers, Models,
  API Keys, Usage, Relay, Config, Prompts, Logs, Agent Templates）
- ProTable + ProForm + ProLayout 统一 UI 模式
- TanStack Query + Axios + Zustand 数据层
- JWT 自动刷新 + 401 重试机制
- 全部 18 网络请求 200 OK，零 ERR_ABORTED

同时更新 troubleshooting 第 13 节和 SaaS 平台文档。

admin-v2/src/services/request.ts

@@ -0,0 +1,108 @@
+// ============================================================
+// ZCLAW Admin V2 — Axios 实例 + JWT 拦截器
+// ============================================================
+
+import axios from 'axios'
+import type { AxiosError, InternalAxiosRequestConfig } from 'axios'
+import type { ApiError } from '@/types'
+import { useAuthStore } from '@/stores/authStore'
+
+const BASE_URL = import.meta.env.VITE_API_BASE_URL || '/api/v1'
+const TIMEOUT_MS = 30_000
+
+/** API 业务错误 */
+export class ApiRequestError extends Error {
+  constructor(
+    public status: number,
+    public body: ApiError,
+  ) {
+    super(body.message || `Request failed with status ${status}`)
+    this.name = 'ApiRequestError'
+  }
+}
+
+const request = axios.create({
+  baseURL: BASE_URL,
+  timeout: TIMEOUT_MS,
+  headers: { 'Content-Type': 'application/json' },
+})
+
+// ── 请求拦截器：自动附加 JWT ──────────────────────────────
+
+request.interceptors.request.use((config: InternalAxiosRequestConfig) => {
+  const token = useAuthStore.getState().token
+  if (token) {
+    config.headers.Authorization = `Bearer ${token}`
+  }
+  return config
+})
+
+// ── 响应拦截器：401 自动刷新 ──────────────────────────────
+
+let isRefreshing = false
+let pendingRequests: Array<(token: string) => void> = []
+
+function onTokenRefreshed(newToken: string) {
+  pendingRequests.forEach((cb) => cb(newToken))
+  pendingRequests = []
+}
+
+request.interceptors.response.use(
+  (response) => response,
+  async (error: AxiosError<{ error?: string; message?: string }>) => {
+    const originalRequest = error.config as InternalAxiosRequestConfig & { _retry?: boolean }
+
+    // 401 → 尝试刷新 Token
+    if (error.response?.status === 401 && !originalRequest._retry) {
+      const store = useAuthStore.getState()
+      if (!store.refreshToken) {
+        store.logout()
+        window.location.href = '/login'
+        return Promise.reject(error)
+      }
+
+      if (isRefreshing) {
+        return new Promise((resolve) => {
+          pendingRequests.push((newToken: string) => {
+            originalRequest.headers.Authorization = `Bearer ${newToken}`
+            resolve(request(originalRequest))
+          })
+        })
+      }
+
+      originalRequest._retry = true
+      isRefreshing = true
+
+      try {
+        const res = await axios.post(`${BASE_URL}/auth/refresh`, null, {
+          headers: { Authorization: `Bearer ${store.refreshToken}` },
+        })
+        const newToken = res.data.token as string
+        store.setToken(newToken)
+        onTokenRefreshed(newToken)
+        originalRequest.headers.Authorization = `Bearer ${newToken}`
+        return request(originalRequest)
+      } catch {
+        store.logout()
+        window.location.href = '/login'
+        return Promise.reject(error)
+      } finally {
+        isRefreshing = false
+      }
+    }
+
+    // 构造 ApiRequestError
+    if (error.response) {
+      const body: ApiError = {
+        error: error.response.data?.error || 'unknown',
+        message: error.response.data?.message || `请求失败 (${error.response.status})`,
+        status: error.response.status,
+      }
+      return Promise.reject(new ApiRequestError(error.response.status, body))
+    }
+
+    return Promise.reject(error)
+  },
+)
+
+export default request