feat(klz-2026): use external URL and static .vcf files for ultra-minimalist QR codes

public/v/johannesgleich.vcf

@@ -0,0 +1,10 @@
+BEGIN:VCARD
+VERSION:3.0
+N:Gleich;Johannes;;;
+FN:Johannes Gleich
+ORG:KLZ Vertriebs GmbH
+TITLE:Senior Key Account Manager
+TEL;TYPE=WORK,VOICE:+49 172 739 1109
+EMAIL;TYPE=PREF,INTERNET:johannes.gleich@klz-cables.com
+URL:https://klz-cables.com
+END:VCARD

public/v/klausmintel.vcf

@@ -0,0 +1,10 @@
+BEGIN:VCARD
+VERSION:3.0
+N:Mintel;Klaus;;;
+FN:Klaus Mintel
+ORG:KLZ Vertriebs GmbH
+TITLE:Managing Director
+TEL;TYPE=WORK,VOICE:+49 151 1775 2873
+EMAIL;TYPE=PREF,INTERNET:klaus.mintel@klz-cables.com
+URL:https://klz-cables.com
+END:VCARD

public/v/michaelbodemer.vcf

@@ -0,0 +1,10 @@
+BEGIN:VCARD
+VERSION:3.0
+N:Bodemer;Michael;;;
+FN:Michael Bodemer
+ORG:KLZ Vertriebs GmbH
+TITLE:Owner & Managing Director
+TEL;TYPE=WORK,VOICE:+49 151 462 467 98
+EMAIL;TYPE=PREF,INTERNET:michael.bodemer@klz-cables.com
+URL:https://klz-cables.com
+END:VCARD

scripts/generate-business-cards.ts

@@ -54,13 +54,23 @@ async function generateBusinessCards() {
 
     const lastName = person.name.split(' ').slice(1).join(' ');
     const firstName = person.name.split(' ')[0];
-    // 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(mecard, {
+    // To make the QR code extremely coarse (minimalist), we cannot encode all contact details into it directly.
+    // Instead, we create a physical .vcf file and encode ONLY its URL into the QR Code (e.g. 35 chars vs 140 chars).
+    const shortId = person.name.toLowerCase().replace(/[^a-z0-9]/g, ''); // "michaelbodemer"
+    const vcfUrl = `https://klz-cables.com/v/${shortId}.vcf`;
+
+    const vcardFull = `BEGIN:VCARD\r\nVERSION:3.0\r\nN:${lastName};${firstName};;;\r\nFN:${person.name}\r\nORG:KLZ Vertriebs GmbH\r\nTITLE:${person.role}\r\nTEL;TYPE=WORK,VOICE:${person.phone}\r\nEMAIL;TYPE=PREF,INTERNET:${person.email}\r\nURL:https://klz-cables.com\r\nEND:VCARD`;
+
+    // Save the physical .vcf file so it can be served by Next.js from /public/v/
+    const vcardDir = path.join(process.cwd(), 'public/v');
+    if (!fs.existsSync(vcardDir)) fs.mkdirSync(vcardDir, { recursive: true });
+    fs.writeFileSync(path.join(vcardDir, `${shortId}.vcf`), vcardFull);
+
+    const qrCodeDataUrl = await QRCode.toDataURL(vcfUrl, {
       width: 400,
       margin: 0,
-      errorCorrectionLevel: 'L', // Low error correction = less dots = easier to scan when small
+      errorCorrectionLevel: 'L', // Low error correction = less dots
       color: { dark: '#000000', light: '#ffffff' },
     });