feat: implement dynamic contact info and availability mapping from field values, and enhance phone number masking.

src/components/profile/ContactInfo.tsx

@@ -18,7 +18,8 @@ function maskEmail(email: string): string {
 
 // Helper function to mask phone
 function maskPhone(phone: string): string {
-  if (phone.length <= 4) return '********';
+  if (!phone || phone.trim() === '') return '-';
+  if (phone.length <= 4) return '****' + phone;
   return phone.slice(0, -4).replace(/./g, '*') + phone.slice(-4);
 }