From 1d74c6c111fd98465a75e98b2bd1edf3ea656cd1 Mon Sep 17 00:00:00 2001
From: Hein <hein.puth@gmail.com>
Date: Sun, 6 Sep 2026 16:07:48 +0200
Subject: [PATCH] fix(ui): correct admin mode detection logic

---
 ui/src/routes/guests/+page.svelte | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ui/src/routes/guests/+page.svelte b/ui/src/routes/guests/+page.svelte
index 8fa7f51..6c0f483 100644
--- a/ui/src/routes/guests/+page.svelte
+++ b/ui/src/routes/guests/+page.svelte
@@ -15,7 +15,9 @@
 		type AdminRsvp
 	} from '$lib/api';
 
-	const isAdmin = $derived(page.url.searchParams.get('admin') === '1');
+	// Guarded by `browser`: the site is prerendered and page.url.searchParams
+	// is inaccessible during prerender/SSR. Admin mode is a client-only concern.
+	const isAdmin = $derived(browser && page.url.searchParams.has('admin'));
 
 	let status = $state<'loading' | 'done' | 'error'>('loading');
 	let errorMessage = $state('');