feat(klz-2026): use MECARD and level L for smaller, highly scannable QR codes on business cards

lib/pdf-business-card.tsx

@@ -351,10 +351,10 @@ const styles = StyleSheet.create({
     gap: 3,
   },
   qrCodeWrapper: {
-    width: '12mm',
-    height: '12mm',
+    width: '10mm',
+    height: '10mm',
     border: `0.75pt solid ${COLORS.darkGreen}`,
-    padding: 2.5,
+    padding: 2,
     backgroundColor: '#ffffff',
   },
   qrCode: {

scripts/generate-business-cards.ts

@@ -52,23 +52,15 @@ async function generateBusinessCards() {
   for (const person of PEOPLE) {
     console.log(`\nGenerating Business Card for: ${person.name}`);
 
-    // Generate VCard QR Code
     const lastName = person.name.split(' ').slice(1).join(' ');
     const firstName = person.name.split(' ')[0];
-    const vcard = `BEGIN:VCARD
-VERSION:3.0
-N:${lastName};${firstName};;;
-FN:${person.name}
-ORG:KLZ Vertriebs GmbH
-TITLE:${person.role}
-TEL;TYPE=WORK,VOICE:${person.phone}
-EMAIL;TYPE=PREF,INTERNET:${person.email}
-URL:https://klz-cables.com
-END:VCARD`;
+    // Generate MECARD QR Code (much shorter than VCARD, leading to a less dense QR code that can be printed smaller)
+    const mecard = `MECARD:N:${lastName},${firstName};ORG:KLZ Vertriebs GmbH;TEL:${person.phone};EMAIL:${person.email};URL:https://klz-cables.com;;`;
 
-    const qrCodeDataUrl = await QRCode.toDataURL(vcard, {
+    const qrCodeDataUrl = await QRCode.toDataURL(mecard, {
       width: 400,
       margin: 0,
+      errorCorrectionLevel: 'L', // Low error correction = less dots = easier to scan when small
       color: { dark: '#000000', light: '#ffffff' },
     });