fix(postcards): move notes to right side before action buttons in list, use dl grid format in detail page

app/templates/postcard_detail.html

@@ -60,10 +60,10 @@
             <dt>收到时间</dt><dd>{{ postcard.receive_time.strftime('%Y-%m-%d') if postcard.receive_time else '-' }}</dd>
             {% endif %}
             <dt>所属 Profile</dt><dd>{{ postcard.profile.nickname }}</dd>
+            {% if postcard.notes %}
+            <dt>备注</dt><dd>{{ postcard.notes }}</dd>
+            {% endif %}
         </dl>
-        {% if postcard.notes %}
-        <div class="detail-notes">{{ postcard.notes }}</div>
-        {% endif %}
     </div>
 </div>
 {% endblock %}