fix: auth login URL is /login on Auth_server, not /auth/login

GET /auth/login → 404. Auth_server's user-facing login form lives at
GET https://auth.queo.ru/login (rendered by views/login.html), while
POST /auth/login is the JSON API. Web was redirecting to wrong path.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/.env.example

@@ -1,2 +1,2 @@
 # URL центра аутентификации Queo
-VITE_AUTH_LOGIN_URL=https://auth.queo.ru/auth/login
+VITE_AUTH_LOGIN_URL=https://auth.queo.ru/login

apps/web/src/auth.ts

@@ -9,7 +9,7 @@ export type Me = {
   docPermission: PermissionRole | null;
 };
 
-const AUTH_LOGIN_URL = import.meta.env.VITE_AUTH_LOGIN_URL ?? 'https://auth.queo.ru/auth/login';
+const AUTH_LOGIN_URL = import.meta.env.VITE_AUTH_LOGIN_URL ?? 'https://auth.queo.ru/login';
 
 export function redirectToLogin(): never {
   const returnTo = encodeURIComponent(window.location.href);