06/09 Allow customer to reply admin answer

app/templates/support/my_ticket_detail.html

@@ -60,7 +60,30 @@
     </div>
     {% endif %}
 
-    <div class="text-center mt-2">
+    {% if ticket.status != 'closed' %}
+    <div class="card shadow-sm mt-3">
+      <div class="card-header"><i class="bi bi-reply me-2"></i>Add a Follow-up</div>
+      <div class="card-body">
+        <form method="post">
+          <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+          <div class="mb-3">
+            <textarea name="body" class="form-control" rows="4" required
+                      placeholder="Type your follow-up message…"></textarea>
+          </div>
+          <button type="submit" class="btn btn-primary btn-sm">
+            <i class="bi bi-send me-1"></i>Send Reply
+          </button>
+        </form>
+      </div>
+    </div>
+    {% else %}
+    <div class="alert alert-secondary mt-3">
+      <i class="bi bi-lock me-2"></i>This request is closed.
+      <a href="{{ url_for('support.chat') }}">Start a new chat</a> if you need further help.
+    </div>
+    {% endif %}
+
+    <div class="text-center mt-3">
       <a href="{{ url_for('support.chat') }}" class="btn btn-outline-primary btn-sm">
         <i class="bi bi-chat-dots me-1"></i>Ask another question
       </a>