feat: add GuestModeBanner component for guest mode notification and login prompt

src/components/shared/GuestModeBanner.tsx

@@ -47,7 +47,7 @@ export const GuestModeBanner: React.FC<{ className?: string }> = ({ className =
         </div>
         <div className="space-y-1 text-left">
           <div className="flex items-center gap-2">
-            <span className="inline-flex items-center justify-center h-5 rounded-md bg-amber-500/20 border border-amber-500/30 px-2 font-nunito text-[11px] font-bold text-amber-700 dark:text-amber-300 uppercase tracking-wide leading-none">
+            <span className="inline-flex items-center justify-center rounded-md bg-amber-500/20 border border-amber-500/30 px-2 pt-0.5 font-nunito text-[11px] font-bold text-amber-700 dark:text-amber-300 leading-normal">
               {badgeText}
             </span>
           </div>