Scroll lamps to 255 as they should be

frontend/src/lib/components/Lamp.svelte

@@ -15,7 +15,8 @@
 
 	function handleWheel(event: WheelEvent) {
 		event.preventDefault();
-		const delta = event.deltaY > 0 ? -4 : 4;
+		const increment = event.shiftKey ? 1 : 4;
+		const delta = event.deltaY > 0 ? -increment : increment;
 		const newBrightness = Math.max(0, Math.min(100, brightness + delta));
 		if (newBrightness !== brightness) {
 			brightness = newBrightness;

frontend/src/lib/router/routes/Home.svelte

@@ -11,7 +11,9 @@
 	});
 
 	function handleBrightnessChange(lamp: number, brightness: number) {
-		SetLampBrightness(lamp, brightness);
+		// Brightness is actually 1-255 and not 1-100
+		// But we want the frontend to show 1-100 as in %
+		SetLampBrightness(lamp, Math.round(brightness * 2.55));
 	}
 </script>