style: apply littwin-blue color to NTP settings checkbox

- Add accent-littwin-blue class to NTP active checkbox
- Increase checkbox size to w-4 h-4 for better visibility
- Maintain consistent brand coloring across UI components

components/main/settingsPageComponents/NTPSettings.tsx

@@ -72,11 +72,12 @@ const NTPSettings: React.FC = () => {
         </div>
 
         <div className="col-span-2 flex items-center gap-2 mt-2">
-          <label className="text-xs font-medium">NTP aktiv:</label>
+          <label className="text-xs font-medium ">NTP aktiv:</label>
           <input
             type="checkbox"
             checked={active}
             onChange={(e) => setActive(e.target.checked)}
+            className="accent-littwin-blue w-4 h-4"
           />
         </div>