Add voltage and frequency to printed device labels

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/routes/(print)/print/device/[id]/+page.server.ts

@@ -15,7 +15,9 @@ export const load: PageServerLoad = async ({ params }) => {
 			brand: devices.brand,
 			model: devices.model,
 			serialNumber: devices.serialNumber,
-			category: devices.category
+			category: devices.category,
+			voltage: devices.voltage,
+			frequency: devices.frequency
 		})
 		.from(devices)
 		.where(eq(devices.id, params.id));

src/routes/(print)/print/device/[id]/+page.svelte

@@ -55,6 +55,11 @@
 						S/N: {data.device.serialNumber}
 					</div>
 				{/if}
+				{#if data.device.voltage || data.device.frequency}
+					<div style="font-size: 6pt; color: #666; margin-top: 0.3mm;">
+						{[data.device.voltage, data.device.frequency].filter(Boolean).join(' / ')}
+					</div>
+				{/if}
 				<div style="margin-top: 1mm;">
 					<img src={data.barcodeDataUrl} alt={data.shortId}
 						style="height: 7mm; width: auto; max-width: 55mm; display: block;" />