fix: move loadCustomerEmails to module scope, wire into switchCTab, add emails to tab loop; drop redundant ?: [] in customer-emails.php

admin/api/customer-emails.php

@@ -24,4 +24,4 @@ $emails = db()->fetchAll(
     ['cid' => $customerId]
 );
 
-echo json_encode(['emails' => $emails ?: []]);
+echo json_encode(['emails' => $emails]);

admin/customers.php

@@ -517,8 +517,45 @@ function toggleCOrd(id){
 var _cCustId = null;
 var _cLoaded = false;
 
+function loadCustomerEmails(customerId) {
+    if (!customerId) return;
+    document.getElementById('cEmailLoading').style.display = 'block';
+    document.getElementById('cEmailContent').style.display = 'none';
+    var colors = {"sent":"#3B82F6","delivered":"#10B981","bounced":"#EF4444","failed":"#EF4444","unknown":"#9CA3AF"};
+    fetch('/admin/api/customer-emails.php?customer_id=' + encodeURIComponent(customerId))
+        .then(r => r.json()).then(function(data) {
+            document.getElementById('cEmailLoading').style.display = 'none';
+            document.getElementById('cEmailContent').style.display = 'block';
+            var emails = data.emails || [];
+            document.getElementById('cEmailBadge').textContent = emails.length;
+            document.getElementById('cEmailViewAll').href = '/admin/email-log.php?customer=' + encodeURIComponent(customerId);
+            if (!emails.length) {
+                document.getElementById('cEmailEmpty').style.display = 'block';
+                document.getElementById('cEmailTable').style.display = 'none';
+                return;
+            }
+            document.getElementById('cEmailEmpty').style.display = 'none';
+            document.getElementById('cEmailTable').style.display = 'table';
+            var html = '';
+            emails.forEach(function(e) {
+                var color = colors[e.status] || '#9CA3AF';
+                var badge = '<span style="background:'+color+';color:white;padding:2px 7px;border-radius:3px;font-size:.75rem;">'+e.status+'</span>';
+                var opened = e.opened == '1' ? '<span style="color:#10B981">✓'+(e.open_count > 1 ? ' ('+e.open_count+')' : '')+'</span>' : '<span style="color:#9CA3AF">—</span>';
+                html += '<tr style="border-bottom:1px solid var(--color-border)">'
+                    + '<td style="padding:.5rem;max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap" title="'+e.subject+'">'+e.subject+'</td>'
+                    + '<td style="padding:.5rem">'+badge+'</td>'
+                    + '<td style="padding:.5rem">'+opened+'</td>'
+                    + '<td style="padding:.5rem;white-space:nowrap;color:#666">'+e.sent_at+'</td>'
+                    + '</tr>';
+            });
+            document.getElementById('cEmailBody').innerHTML = html;
+        }).catch(function() {
+            document.getElementById('cEmailLoading').innerHTML = '<div style="color:var(--color-error)"><i class="fas fa-exclamation-circle"></i> Failed to load emails</div>';
+        });
+}
+
 function switchCTab(tab) {
-    ['details','orders'].forEach(function(t) {
+    ['details','orders','emails'].forEach(function(t) {
         var tabBtn = document.getElementById('ctab-' + t);
         var panel  = document.getElementById('cpanel-' + t);
         if (tabBtn) {
@@ -528,6 +565,7 @@ function switchCTab(tab) {
         if (panel) panel.style.display = t === tab ? '' : 'none';
     });
     if (tab === 'orders' && _cCustId && !_cLoaded) loadCOrders(_cCustId);
+    if (tab === 'emails' && _cCustId) loadCustomerEmails(_cCustId);
 }
 
 
@@ -535,43 +573,6 @@ function openCustomerModal(customer = null) {
     const isEdit = !!customer;
     _cCustId = isEdit ? customer.customer_id : null;
     _cLoaded = false;
-    // Email history loader
-    function loadCustomerEmails(customerId){
-        if(!customerId) return;
-        document.getElementById('cEmailLoading').style.display='block';
-        document.getElementById('cEmailContent').style.display='none';
-        fetch('/admin/api/customer-emails.php?customer_id='+encodeURIComponent(customerId))
-            .then(r=>r.json()).then(function(data){
-                document.getElementById('cEmailLoading').style.display='none';
-                document.getElementById('cEmailContent').style.display='block';
-                var emails=data.emails||[];
-                document.getElementById('cEmailBadge').textContent=emails.length;
-                document.getElementById('cEmailViewAll').href='/admin/email-log.php?customer='+encodeURIComponent(customerId);
-                if(!emails.length){
-                    document.getElementById('cEmailEmpty').style.display='block';
-                    document.getElementById('cEmailTable').style.display='none';
-                    return;
-                }
-                document.getElementById('cEmailEmpty').style.display='none';
-                document.getElementById('cEmailTable').style.display='table';
-                var colors={"sent":"#3B82F6","delivered":"#10B981","bounced":"#EF4444","failed":"#EF4444","unknown":"#9CA3AF"};
-                var html='';
-                emails.forEach(function(e){
-                    var color=colors[e.status]||'#9CA3AF';
-                    var badge='<span style="background:'+color+';color:white;padding:2px 7px;border-radius:3px;font-size:.75rem;">'+e.status+'</span>';
-                    var opened=e.opened=='1'?'<span style="color:#10B981">✓'+(e.open_count>1?' ('+e.open_count+')':'')+'</span>':'<span style="color:#9CA3AF">—</span>';
-                    html+='<tr style="border-bottom:1px solid var(--color-border)">'
-                        +'<td style="padding:.5rem;max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap" title="'+e.subject+'">'+e.subject+'</td>'
-                        +'<td style="padding:.5rem">'+badge+'</td>'
-                        +'<td style="padding:.5rem">'+opened+'</td>'
-                        +'<td style="padding:.5rem;white-space:nowrap;color:#666">'+e.sent_at+'</td>'
-                        +'</tr>';
-                });
-                document.getElementById('cEmailBody').innerHTML=html;
-            }).catch(function(){
-                document.getElementById('cEmailLoading').innerHTML='<div style="color:var(--color-error)"><i class="fas fa-exclamation-circle"></i> Failed to load emails</div>';
-            });
-    }
 
     document.getElementById('customerModalTitle').textContent = isEdit ? 'Edit Customer' : 'Add Customer';
     document.getElementById('customerSubmitBtn').textContent = isEdit ? 'Update Customer' : 'Add Customer';