Show build platform badge on build list and task detail pages

rdgenerator/templates/my_builds.html

@@ -16,7 +16,8 @@
             <tr>
                 <th>提交时间</th>
                 <th>配置名称</th>
-                <th>平台</th>
+                <th>目标平台</th>
+                <th>构建平台</th>
                 <th>状态</th>
                 <th>任务编号</th>
                 <th>操作</th>
@@ -28,6 +29,7 @@
                 <td class="text-muted" style="white-space:nowrap">{{ run.created_at|date:"Y-m-d H:i" }}</td>
                 <td><strong>{{ run.filename|default:"—" }}</strong></td>
                 <td>{{ run.platform_label }}</td>
+                <td><span class="badge {{ run.backend_badge_class }}">{{ run.backend_label }}</span></td>
                 <td><span class="badge {{ run.status_badge }} {% if not run.is_finished %}badge-dot{% endif %}">{{ run.status_label }}</span></td>
                 <td class="mono text-muted">{{ run.short_uuid }}</td>
                 <td style="white-space:nowrap">