feat: update getQuizResult to handle no records gracefully by using getList

src/lib/db.js

@@ -194,9 +194,16 @@ export async function saveQuizResult(userId, weekNumber, result) {
 
 export async function getQuizResult(userId, weekNumber) {
   try {
-    const r = await pb.collection('test_results').getFirstListItem(
-      `user_id="${userId}" && week_number=${weekNumber}`,
-    );
+    // Use getList instead of getFirstListItem so that "no record yet" returns
+    // an empty items array (HTTP 200) rather than throwing a ClientResponseError
+    // that the SDK logs to the browser console as a 404.
+    const res = await pb.collection('test_results').getList(1, 1, {
+      filter: `user_id="${userId}" && week_number=${weekNumber}`,
+      skipTotal: true,
+      requestKey: null,
+    });
+    const r = res.items[0];
+    if (!r) return null;
     // Map snake_case PB fields back to the camelCase shape Testen.jsx expects.
     return {
       score:        r.score,