subcategories and editing for tasks

templates/task_detail.html

@@ -15,7 +15,7 @@
             <form action="{{ url_for('toggle_timer', activity_id=task.activity_id) }}" method="POST" style="margin-top: 10px;">
                 <input type="hidden" name="note" value="{{ task.name }}">
                 <button type="submit" class="btn" style="background: #27ae60;">
-                    ▶ Start Timer for this Task
+                    Start Timer
                 </button>
             </form>
             {% else %}