fix: resolve address footer page break and make QR border green

lib/pdf-business-card.tsx

@@ -261,7 +261,7 @@ const styles = StyleSheet.create({
   qrCodeWrapper: {
     width: '12mm',
     height: '12mm',
-    border: '0.75pt solid #011dff',
+    border: `0.75pt solid ${COLORS.green}`,
     padding: 2.5,
     backgroundColor: '#ffffff',
   },
@@ -274,9 +274,8 @@ const styles = StyleSheet.create({
     flexDirection: 'row',
     justifyContent: 'center',
     alignItems: 'center',
-    paddingTop: '2.5mm',
-    marginTop: 'auto',
-    marginBottom: '2mm', // Force extra space from the bottom edge
+    position: 'absolute',
+    bottom: '2mm',
   },
   addressFooterText: {
     fontSize: 7, // increased from 6