fix(realtime): handle base64 bytea payloads from postgres_changes

packages/shared/src/supabase/bytea.ts

@@ -23,3 +23,20 @@ export function pgHexToBytes(hex: string): Uint8Array {
   }
   return out;
 }
+
+// Accepts either:
+//   - PostgREST/REST `\x<hex>` strings (what the .from('table').select() path
+//     returns for bytea), or
+//   - Realtime `postgres_changes` payloads, which encode bytea as plain
+//     base64 (no `\x` prefix).
+// Useful when the same row can arrive through both paths in the same UI.
+export function pgBytesToBytes(value: string): Uint8Array {
+  if (value.startsWith('\\x')) {
+    return pgHexToBytes(value);
+  }
+  // Assume base64 (the realtime serializer's default for bytea).
+  const bin = atob(value);
+  const out = new Uint8Array(bin.length);
+  for (let i = 0; i < bin.length; i++) out[i] = bin.charCodeAt(i);
+  return out;
+}