feat(auth): support captcha login

clinical-web/src/api/auth.ts

@@ -4,6 +4,7 @@ import { ApiResponseError, unwrapApiResponse } from '@/utils/api-response'
 import { request } from '@/utils/request'
 import type {
   AuthenticatedUser,
+  CaptchaResponse,
   CurrentUserResponse,
   LoginRequest,
   LoginResponse,
@@ -12,6 +13,11 @@ import type { ApiResponse } from '@/types/common'
 
 export { ApiResponseError } from '@/utils/api-response'
 
+export async function getCaptcha(): Promise<CaptchaResponse> {
+  const response = await request.get<ApiResponse<CaptchaResponse>>('/v1/auth/captcha')
+  return unwrapApiResponse(response)
+}
+
 function normalizePermissions(value: unknown): string[] {
   if (Array.isArray(value)) {
     return value.filter((item): item is string => typeof item === 'string')