Fix video annotation reactive label update

Author: mzur

resources/assets/js/videos/models/Annotation.vue

@@ -16,7 +16,7 @@ export default class Annotation {
         this.shape_id = args.shape_id;
         this.created_at = args.created_at;
         this.updated_at = args.updated_at;
-        this.labels = args.labels;
+        this._labels = ref(args.labels);
 
         this._pending = ref(args.pending || false);
         this._selected = ref(false);
@@ -56,6 +56,14 @@ export default class Annotation {
         this._tracking.value = value;
     }
 
+    get labels() {
+        return this._labels.value;
+    }
+
+    set labels(value) {
+        this._labels.value = value;
+    }
+
     get frames() {
         return this._frames.value;
     }