fix(identity): render host-aware login dynamically

frontend/src/app/login/page.tsx

@@ -8,6 +8,8 @@ import {
 } from "@/modules/identity/config";
 import { resolveIdentitySurface } from "@/modules/identity/host";
 
+export const dynamic = "force-dynamic";
+
 export default async function LoginPage() {
   const config = readIdentityConfig(process.env);
   let provider = config.provider;

frontend/tests/identity-login-provider.test.ts

@@ -11,6 +11,7 @@ test("login page selects the auth provider from server-only validated config", (
   );
 
   assert.doesNotMatch(page, /["']use client["']/);
+  assert.match(page, /export const dynamic = "force-dynamic"/);
   assert.match(page, /readIdentityConfig\(process\.env\)/);
   assert.match(page, /isSelfHostedIdentityEnabled\(process\.env\)/);
   assert.match(page, /resolveIdentitySurface/);