fix: revert line spacing to compact layout, keep generous logo margin

lib/pdf-business-card.tsx

@@ -210,7 +210,7 @@ const styles = StyleSheet.create({
     flexDirection: 'column',
   },
   nameSection: {
-    marginBottom: '4mm', // Generous space before contact info
+    marginBottom: '1mm', // Keep tight spacing to contact rows
   },
   nameText: {
     fontSize: 14,
@@ -233,7 +233,7 @@ const styles = StyleSheet.create({
   contactRow: {
     flexDirection: 'row',
     alignItems: 'center',
-    marginBottom: 4, // Professional spacing
+    marginBottom: 2, // Keep tight, compact line spacing
   },
   iconWrapper: {
     width: 12,