diff --git a/src/app/api/metrics/prs/route.ts b/src/app/api/metrics/prs/route.ts
index b5f734133..c3e039746 100644
--- a/src/app/api/metrics/prs/route.ts
+++ b/src/app/api/metrics/prs/route.ts
@@ -204,7 +204,7 @@ async function fetchPRMetrics(
   const open = data.items.filter((pr) => pr.state === "open").length;
   const mergedPRs = data.items.filter((pr) => pr.pull_request?.merged_at != null);
   const merged = mergedPRs.length;
-  const closed = data.items.filter((pr) => pr.state === "closed" && pr.pull_request?.merged_at == null).length;
+  const closed = data.items.filter((pr) => pr.state === "closed" && pr.pull_request?.merged_at === null).length;
 
   const avgReviewMs = mergedPRs.length > 0
     ? mergedPRs.reduce((sum, pr) => sum + (new Date(pr.closed_at!).getTime() - new Date(pr.created_at).getTime()), 0) / mergedPRs.length
diff --git a/src/app/api/metrics/repo-analytics/route.ts b/src/app/api/metrics/repo-analytics/route.ts
index caf5e0946..a7a3fb6c4 100644
--- a/src/app/api/metrics/repo-analytics/route.ts
+++ b/src/app/api/metrics/repo-analytics/route.ts
@@ -98,7 +98,7 @@ export async function GET(req: NextRequest) {
       } else if (activityRes.ok) {
         const activityData = await activityRes.json();
         if (Array.isArray(activityData) && activityData.length > 0) {
-          const lastWeek = activityData[activityData.length - 1];
+          const lastWeek = activityData.at(-1);
           const days: number[] = lastWeek.days || [];
           // `lastWeek.week` is a Unix timestamp (seconds) for the Sunday that starts the bucket.
           // Derive labels from it so they always match the actual calendar days GitHub recorded.
diff --git a/src/app/api/milestones/route.ts b/src/app/api/milestones/route.ts
index 4019a3d7f..19ec9c30c 100644
--- a/src/app/api/milestones/route.ts
+++ b/src/app/api/milestones/route.ts
@@ -92,7 +92,7 @@ export async function POST(req: Request) {
       ? unit.trim().slice(0, MAX_UNIT_LEN)
       : "units";
 
-  if (typeof targetDate !== "string" || isNaN(new Date(targetDate).getTime())) {
+  if (typeof targetDate !== "string" || Number.isNaN(new Date(targetDate).getTime())) {
     return NextResponse.json({ error: "targetDate must be a valid date string" }, { status: 400 });
   }
 
diff --git a/src/app/compare/[users]/page.tsx b/src/app/compare/[users]/page.tsx
index fa4e35efe..280156d54 100644
--- a/src/app/compare/[users]/page.tsx
+++ b/src/app/compare/[users]/page.tsx
@@ -419,3 +419,5 @@ function ReposCard({ username, repos }: { username: string; repos: TopRepo[] })
     </div>
   );
 }
+
+.catch(err => console.error("Promise.all failed:", err));
\ No newline at end of file