style(SessionsTab): add overflow-auto to improve scroll behavior

src/renderer/src/pages/home/Tabs/SessionsTab.tsx

@@ -32,6 +32,7 @@ const SessionsTab: FC<SessionsTabProps> = () => {
         exit={{ width: 0, opacity: 0 }}
         transition={{ duration: 0.5, ease: 'easeInOut' }}
         className={cn(
+          'overflow-auto',
           topicPosition === 'right' && navbarPosition === 'top' ? 'rounded-l-2xl border-t border-b border-l' : undefined
         )}>
         {!activeAgentId ? (