index chat rate limit checks

Author: dnywh

src/app/actions.ts

@@ -242,7 +242,9 @@ export const signUpAction = async (formData: FormData, request?: Request) => {
 
     // Back to general error catching
     console.error(
-      error?.code + " " + error?.message || "No user returned from sign up"
+      error
+        ? `${error.code ?? "unknown"} ${error.message ?? "Unknown sign-up error"}`
+        : "No user returned from sign up"
     );
     redirectUrl.searchParams.append(
       "error",

supabase/migrations/20260511042903_add_chat_message_sender_rate_limit_index.sql

@@ -0,0 +1,4 @@
+-- Support chat sender rate-limit checks in private trigger functions.
+
+create index if not exists chat_messages_sender_id_created_at_idx
+  on public.chat_messages (sender_id, created_at desc);