feat: default steve skin

src/renderer/components/SkinViewer.tsx

@@ -33,7 +33,9 @@ export default function SkinViewer({
           canvas: canvasRef.current,
           width,
           height,
-          skin: skinUrl || undefined,
+          skin:
+            skinUrl ||
+            'https://static.planetminecraft.com/files/resource_media/skin/original-steve-15053860.png',
           model: 'auto-detect',
           cape: capeUrl || undefined,
         });