Fix critical member management issues: dues tracking, member IDs, and profile display

- Fix dues payment logic to automatically calculate payment_due_date as 1 year from payment date
- Remove redundant dues_paid_until field and replace with payment_due_date throughout
- Implement member ID generation system with format MUSA-YYYY-XXXX
- Create migration endpoints for generating member IDs and fixing payment dates
- Update admin members page to display actual member_id from database
- Ensure ProfileAvatar components use correct member_id field
- Add support for profile images in list and grid views with initials fallback
- Fix countries export alias for backward compatibility

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

pages/admin/payments/index.vue

@@ -509,7 +509,7 @@ const loadPayments = async () => {
         
         // If member has dues due/overdue, create a pending payment record
         if (member.dues_status === 'Due' || member.dues_status === 'Overdue') {
-          const dueDate = member.dues_paid_until ? new Date(member.dues_paid_until) : null;
+          const dueDate = member.payment_due_date ? new Date(member.payment_due_date) : null;
           if (dueDate) {
             paymentRecords.push({
               id: transactionCounter++,