fix: update logout flow to use registered post-logout route and add redirect handler

frontend/src/routes/auth/post-logout/+server.ts

@@ -0,0 +1,13 @@
+import { redirect } from '@sveltejs/kit';
+import type { RequestHandler } from './$types';
+import { getWorkspaceLoginUrl } from '$lib/server/workspace-auth';
+
+/**
+ * KC redirects here after completing the logout flow.
+ * This URL is covered by the app's registered wildcard in KC (e.g. anexo76-dev.aduanasoft.com/*).
+ * We then send the user to workspace login so it can apply myApps() launcher logic.
+ */
+export const GET: RequestHandler = async ({ request }) => {
+	const systemBaseUrl = new URL(request.url).origin;
+	throw redirect(303, getWorkspaceLoginUrl(systemBaseUrl, { forPostLogout: true }));
+};