Fix: Gmail SMTP guidance, registration form field, and conditional admin auto-refresh

app/templates/admin/base.html

@@ -229,10 +229,18 @@
             document.getElementById('sidebar').classList.toggle('show');
         });
         
-        // Auto-refresh stats every 30 seconds
-        setTimeout(function() {
-            location.reload();
-        }, 30000);
+        // Conditional auto-refresh logic
+        {% if request.endpoint == 'admin.mail_settings' %}
+            {% if settings and settings.enabled %}
+                setTimeout(function() {
+                    location.reload();
+                }, 30000);
+            {% endif %}
+        {% else %}
+            setTimeout(function() {
+                location.reload();
+            }, 30000);
+        {% endif %}
     </script>
 </body>
 </html>

app/templates/admin/mail_settings.html

@@ -1,6 +1,18 @@
 {% extends 'admin/base.html' %}
 {% block admin_content %}
 <h2>Mail Server Settings</h2>
+<div class="alert alert-info" style="max-width:600px;">
+  <strong>Recommended Gmail SMTP Settings:</strong><br>
+  <ul style="margin-bottom:0;">
+    <li><b>Server:</b> smtp.gmail.com</li>
+    <li><b>Port:</b> 587</li>
+    <li><b>Use TLS:</b> True</li>
+    <li><b>Username:</b> your Gmail address (e.g. yourname@gmail.com)</li>
+    <li><b>Password:</b> your Gmail <b>App Password</b> (not your regular password)</li>
+    <li><b>Default sender:</b> your Gmail address (e.g. yourname@gmail.com)</li>
+  </ul>
+  <small>To use Gmail SMTP, you must create an <a href="https://myaccount.google.com/apppasswords" target="_blank">App Password</a> in your Google Account security settings.</small>
+</div>
 <form method="post">
     <div class="form-group">
         <label for="enabled">Enable Email Sending</label>