feat(stream-proxy): 摄像头列表按应用名+流ID排序，同应用分组显示

src/main/java/com/genersoft/iot/vmp/streamProxy/dao/provider/StreamProxyProvider.java

@@ -61,7 +61,8 @@ public class StreamProxyProvider {
         if (params.get("mediaServerId") != null) {
             sqlBuild.append(" AND st.media_server_id='").append(params.get("mediaServerId")).append("'");
         }
-        sqlBuild.append(" order by st.create_time desc");
+        // 先按应用名分组，再按流ID排序
+        sqlBuild.append(" order by st.app, st.stream");
         return sqlBuild.toString();
     }
 }