Support file-less scenes. Add scene split, merge and reassign file (#3006)

* Reassign scene file functionality
* Implement scene create
* Add scene create UI
* Add sceneMerge backend support
* Add merge scene to UI
* Populate split create with scene details
* Add merge button to duplicate checker
* Handle file-less scenes in marker preview generate
* Make unique file name for file-less scene exports
* Add o-counter to scene update input
* Hide rescan for file-less scenes
* Generate heatmap if no speed set on file
* Fix count in scene/image queries

ui/v2.5/src/components/Scenes/SceneCard.tsx

@@ -360,6 +360,16 @@ export const SceneCard: React.FC<ISceneCardProps> = (
     if (!props.compact && props.zoomIndex !== undefined) {
       return `zoom-${props.zoomIndex}`;
     }
+
+    return "";
+  }
+
+  function filelessClass() {
+    if (!props.scene.files.length) {
+      return "fileless";
+    }
+
+    return "";
   }
 
   const cont = configuration?.interface.continuePlaylistDefault ?? false;
@@ -373,7 +383,7 @@ export const SceneCard: React.FC<ISceneCardProps> = (
 
   return (
     <GridCard
-      className={`scene-card ${zoomIndex()}`}
+      className={`scene-card ${zoomIndex()} ${filelessClass()}`}
       url={sceneLink}
       title={objectTitle(props.scene)}
       linkClassName="scene-card-link"