From 9329d6a0ff83f560ad18f9a77879453b257efb38 Mon Sep 17 00:00:00 2001
From: Saurabh Kumar Bajpai <saurabhkumarbajpaiai@gmail.com>
Date: Sun, 2 Aug 2026 15:52:30 +0530
Subject: [PATCH] fix: code quality and safety improvements

---
 src/services/rankHistoryService.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/services/rankHistoryService.js b/src/services/rankHistoryService.js
index 597cd60..2f1aeb0 100644
--- a/src/services/rankHistoryService.js
+++ b/src/services/rankHistoryService.js
@@ -26,7 +26,7 @@ export const saveRankSnapshot = async (uid, rank, totalPoints, timezone) => {
   // Extract number from "#42" or similar
   const numericRank =
     typeof rank === "string" ? parseInt(rank.replace(/[^0-9]/g, ""), 10) : rank;
-  if (isNaN(numericRank)) return;
+  if (Number.isNaN(numericRank)) return;
 
   const timeZone = resolveTimezone(timezone);
   const todayStr = toLocalDateString(new Date(), timeZone);