feat(web): migrate account and user management to React

Add React account and user administration flows, including TOTP and SSO handling. Route /next SSO callbacks to React while preserving the existing Vue and native app behavior, and cover the routing policy with API tests.

web-react/src/api/files.ts

@@ -0,0 +1,38 @@
+import type { AxiosRequestConfig } from 'axios'
+import http from './http'
+
+function responseFileName(header: string | undefined, fallback: string) {
+  if (!header) return fallback
+  const encoded = header.match(/filename\*=UTF-8''([^;]+)/i)?.[1]
+  if (encoded) return decodeURIComponent(encoded)
+  const plain = header.match(/filename="?([^";]+)"?/i)?.[1]
+  return plain || fallback
+}
+
+export async function downloadApiFile(
+  path: string,
+  fallbackName: string,
+  config?: AxiosRequestConfig,
+) {
+  const response = await http.get(path, { ...config, responseType: 'blob' })
+  const url = URL.createObjectURL(response.data)
+  try {
+    const anchor = document.createElement('a')
+    anchor.href = url
+    anchor.download = responseFileName(response.headers['content-disposition'], fallbackName)
+    document.body.appendChild(anchor)
+    anchor.click()
+    anchor.remove()
+  } finally {
+    URL.revokeObjectURL(url)
+  }
+}
+
+export async function importExcel(path: string, file: File) {
+  const form = new FormData()
+  form.append('file', file)
+  return http.post(path, form, {
+    headers: { 'Content-Type': 'multipart/form-data' },
+    timeout: 60000,
+  })
+}