SSR을 비활성화하여 SPA로 전환

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/routes/(fullscreen)/auth/login/+page.ts

@@ -0,0 +1,6 @@
+import type { PageLoad } from "./$types";
+
+export const load: PageLoad = async ({ url }) => {
+  const redirectPath = url.searchParams.get("redirect") || "/home";
+  return { redirectPath };
+};