Add DK-22210 label printing with barcode and QR code

- Print page formatted for Brother DK-22210 (29mm continuous tape)
- Each label has: title, brand/model, serial, QR code, Code 128 barcode
- CSS @page sized to 29mm width with minimal margins
- Print button opens popup that auto-triggers print dialog
- Copies selector to print multiple labels at once
- Barcode encodes short ID (first 8 chars) scannable by the lookup endpoint
- Available on both device and component detail pages

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

src/lib/server/barcode.ts

@@ -0,0 +1,17 @@
+// @ts-expect-error bwip-js types not resolved by bundler moduleResolution
+import bwipjs from 'bwip-js';
+
+export async function generateBarcodeSvg(text: string): Promise<string> {
+	const buf = await bwipjs.toBuffer({
+		bcid: 'code128',
+		text,
+		scale: 3,
+		height: 8,
+		includetext: true,
+		textsize: 8,
+		textxalign: 'center'
+	});
+
+	// Return as base64 data URL for embedding in HTML
+	return `data:image/png;base64,${buf.toString('base64')}`;
+}