From d650987b9a7ccc5b7954f9eb43dbcf772c0fbfc3 Mon Sep 17 00:00:00 2001
From: Patrick Plate <pplate@fedora.fritz.box>
Date: Sat, 13 Jun 2026 09:28:52 +0200
Subject: [PATCH] fix(frontend): guard redirect callback against undefined url
 during SSG

---
 cannamanage-frontend/src/lib/auth.ts | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/cannamanage-frontend/src/lib/auth.ts b/cannamanage-frontend/src/lib/auth.ts
index e7a0fc1..ad34a71 100644
--- a/cannamanage-frontend/src/lib/auth.ts
+++ b/cannamanage-frontend/src/lib/auth.ts
@@ -106,10 +106,16 @@ export const { handlers, signIn, signOut, auth } = NextAuth({
       return session
     },
     async redirect({ url, baseUrl }) {
+      // Guard: url may be undefined during static generation
+      if (!url) return baseUrl
       // Handle relative URLs
       if (url.startsWith("/")) return `${baseUrl}${url}`
       // Handle same-origin URLs
-      if (new URL(url).origin === baseUrl) return url
+      try {
+        if (new URL(url).origin === baseUrl) return url
+      } catch {
+        // Invalid URL — fall back to baseUrl
+      }
       return baseUrl
     },
   },