feat(schedule): implement multiple schedule providers

gallery/easel/route/view/schedule/templates/channel.html

@@ -16,7 +16,7 @@ locale=request.state.language)}}
     <i class="bi bi-arrow-left-square"></i>
   </a>
   <a class="icon-link"
-     href="../..">
+     href="../../..">
     <i class="bi bi-arrow-up-square"></i>
   </a>
   <span>{{response.channel.name}} | {{format_date(response.date, DATE_FORMAT, locale=request.state.language)}}</span>
@@ -30,14 +30,15 @@ locale=request.state.language)}}
     <tr>
       <td></td>
       <td></td>
-      <td></td>
     </tr>
   </thead>
   <tbody>
     {% for value in response.values %}
     <tr class="{{'table-success' if value.live else ''}}">
-      <td>{{value.start.strftime('%H:%M')}}</td>
-      <td>{{(value.end - value.start) | timedelta_format}}</td>
+      <td>
+        <span>{{value.start.strftime('%H:%M')}}</span>
+        <span class="small ms-1">({{(value.end - value.start) | timedelta_format}})</span>
+      </td>
       <td>{{value.label}}</td>
     </tr>
     {% endfor %}