diff --git a/app/achievements/AchievementsClient.tsx b/app/achievements/AchievementsClient.tsx
index 38c35dc8b..53efb8474 100644
--- a/app/achievements/AchievementsClient.tsx
+++ b/app/achievements/AchievementsClient.tsx
@@ -236,7 +236,7 @@ export function UnlockCelebration({
       );
       if (!focusable || focusable.length === 0) return;
       const first = focusable[0];
-      const last = focusable[focusable.length - 1];
+      const last = focusable.at(-1);
       if (event.shiftKey && document.activeElement === first) {
         event.preventDefault();
         last.focus();
diff --git a/app/api/streak/route.ts b/app/api/streak/route.ts
index df37962c8..c38f1d737 100644
--- a/app/api/streak/route.ts
+++ b/app/api/streak/route.ts
@@ -64,7 +64,7 @@ const SVG_CSP_HEADER =
   "default-src 'none'; style-src 'unsafe-inline' https://fonts.googleapis.com; font-src https://fonts.gstatic.com; connect-src https://fonts.gstatic.com;";
 
 function getMonthlyReferenceDate(year: string | undefined, timezone: string): Date | undefined {
-  if (!year) return undefined;
+  if (!year) return;
 
   const selectedYear = Number(year);
   const currentYear = Number(
diff --git a/app/compare/CompareClient.tsx b/app/compare/CompareClient.tsx
index 55ca8bed4..b19da4127 100644
--- a/app/compare/CompareClient.tsx
+++ b/app/compare/CompareClient.tsx
@@ -1777,3 +1777,5 @@ export default function CompareClient() {
     </>
   );
 }
+
+.catch(err => console.error("Promise.all failed:", err));
\ No newline at end of file