changed controller action & javascript

app/controllers/assets_controller.rb

@@ -36,19 +36,8 @@ class AssetsController < ApplicationController
   def toggle_view_mode
     @asset.view_mode = toggle_view_mode_params[:view_mode]
     @asset.save!(touch: false)
-    gallery_view_id = if @assoc.is_a?(Step)
-                        @assoc.id
-                      elsif @assoc.is_a?(Result)
-                        @assoc.my_module.id
-                      end
-    render json: {
-      html: render_to_string(
-        partial: 'assets/asset', locals: {
-          asset: @asset,
-          gallery_view_id: gallery_view_id
-        }
-      )
-    }
+
+    render json: AssetSerializer.new(@asset, scope: { user: current_user }).as_json
   end
 
   def load_asset

app/javascript/vue/shared/content/attachments/context_menu.vue

@@ -139,12 +139,6 @@
           type: 'PATCH',
           dataType: 'json',
           data: { asset: { view_mode: viewMode } }
-        }).done(data => {
-          this.$nextTick(function() {
-            $(`.asset[data-asset-id=${this.attachment.id}] img`)
-              .replaceWith($(data.html).find(`.asset[data-asset-id=${this.attachment.id}] img`));
-            ActiveStoragePreviews.reloadPreview(`.asset[data-asset-id=${this.attachment.id}] img`);
-          })
         });
       },
       deleteAttachment() {

app/views/assets/_asset_list.html.erb

@@ -4,7 +4,7 @@
   data-asset-updated-at="<%= asset.updated_at.to_i %>"
   data-asset-order="1"
 >
-  <%= image_tag asset.medium_preview || rails_blob_path(asset.file, disposition: 'attachment') %>
+  <%= file_extension_icon_html(asset) %>
   <%= link_to rails_blob_path(asset.file, disposition: 'attachment'),
     class: "file-preview-link file-name",
     id: "modal_link#{asset.id}",