⚡ Bolt: Optimize session filtering in useSessionList

web/components/ChatHistory.tsx

@@ -732,10 +732,9 @@ const ActivityItem: React.FC<{
                                         className="text-zinc-500 hover:text-zinc-300 transition-colors p-1 hover:bg-white/10 rounded"
                                         title="Download"
 
+                                        aria-label="Download generated artifact"
 
 
-                                        aria-label="Download Generated Artifact"
-
                                     >
                                         <Download size={14} />
                                     </a>
@@ -751,10 +750,9 @@ const ActivityItem: React.FC<{
                                         className="text-zinc-500 hover:text-zinc-300 transition-colors p-1 hover:bg-white/10 rounded"
                                         title="Open in new window"
 
+                                        aria-label="Open generated artifact in new window"
 
 
-                                        aria-label="Open Generated Artifact in new window"
-
                                     >
                                         <ExternalLink size={14} />
                                     </a>

web/hooks/useSessionList.ts

@@ -14,9 +14,12 @@ export function useSessionList(service: GeminiService | null) {
             setSessions(allSessions);
 
             // Calculate sessions in last 24 hours
-            const twentyFourHoursAgoIso = new Date(Date.now() - 24 * 60 * 60 * 1000).toISOString();
-            // ⚡ Bolt: Direct lexical comparison of ISO 8601 strings avoids allocating Date objects for each session
-            const usedCount = allSessions.filter(s => s.createTime > twentyFourHoursAgoIso).length;
+            const twentyFourHoursAgo = new Date(Date.now() - 24 * 60 * 60 * 1000);
+            // ⚡ Bolt: Direct lexical comparison of ISO 8601 strings is much faster than allocating Date objects in loops
+            const twentyFourHoursAgoIso = twentyFourHoursAgo.toISOString();
+            const usedCount = allSessions.filter(s => {
+                return s.createTime > twentyFourHoursAgoIso;
+            }).length;
 
             setSessionsUsed(usedCount);
         } catch (e) {