Fix

public/header_common.php

@@ -128,32 +128,34 @@ $fullName = $_SESSION['full_name'] ?? $userEmail;
 </style>
 
 <script>
-$(document).ready(function() {
+if (typeof jQuery !== 'undefined') {
+    $(document).ready(function() {
 
-    $('#profileToggle').click(function(e) {
-        e.stopPropagation();
-        $('#profileMenu').toggle();
-    });
+        $('#profileToggle').click(function(e) {
+            e.stopPropagation();
+            $('#profileMenu').toggle();
+        });
 
-    $(document).click(function(e) {
-        if (!$(e.target).closest('.user-profile-dropdown').length) {
-            $('#profileMenu').hide();
-        }
-    });
+        $(document).click(function(e) {
+            if (!$(e.target).closest('.user-profile-dropdown').length) {
+                $('#profileMenu').hide();
+            }
+        });
 
-    <?php if ($isLoggedIn): ?>
-    $.ajax({
-        url: 'api/cart.php?action=count',
-        method: 'GET',
-        success: function(response) {
-            try {
-                const result = JSON.parse(response);
-                if (result.success) {
-                    $('#cartCount').text(result.count);
-                }
-            } catch(e) {}
-        }
+        <?php if ($isLoggedIn): ?>
+        $.ajax({
+            url: 'api/cart.php?action=count',
+            method: 'GET',
+            success: function(response) {
+                try {
+                    const result = JSON.parse(response);
+                    if (result.success) {
+                        $('#cartCount').text(result.count);
+                    }
+                } catch(e) {}
+            }
+        });
+        <?php endif; ?>
     });
-    <?php endif; ?>
-});
+}
 </script>