- The three market Content Blocks preview as compact collapsible rows:

thumbnail of the actual image (hero background, intro image, insights
  cover), key copy in the summary line, full details expanded; card and
  intro-paragraph previews are wrapped in the same mechanism
- New SubmarketPluginPreview for vitec_usecaselist / vitec_productfeature /
  vitec_productlist: instead of bare standard boxes they now list the
  selected story titles (flagging stories that still lack a quote), the
  featured product and the hand-picked products in order
- Container-style collapse for whole page-module COLUMNS: a chevron at the
  right of every column header folds a section down to its title row,
  state kept per page and colPos in localStorage - the slot view of a
  sub-market page folds to six slim bands
- Previews sit under the page module's pointer-events lock and its
  click-to-edit layer: pointer events are re-enabled inside the collapse
  markup and the toggle runs on pointerdown in the capture phase
- Two more v14 removals fixed on the way, both latent in the OLDER preview
  classes too (Usecaseshow, Modelcard would have crashed the page module):
  GridColumnItem::getRecord() now returns a Domain\Record object, and
  StandaloneView is gone - previews normalize the record via a shared
  helper and render through the ViewFactory

packages/vitec/ContentBlocks/ContentElements/card/templates/backend-preview.html

@@ -3,7 +3,16 @@
 <f:section name="Content">
 
 <f:asset.css identifier="vitec-backend-preview" href="EXT:vitec/Resources/Public/Css/backend-preview.css"/>
+<f:asset.script identifier="vitec-backend-collapse" src="EXT:vitec/Resources/Public/JavaScript/backend-preview-collapse.js"/>
 
+<details class="vitec-collapse">
+<summary>
+    <f:if condition="{data.image.0}"><f:image image="{data.image.0}" class="vitec-collapse__thumb" width="72c" height="44c" alt=""/></f:if>
+    <span class="vitec-collapse__label">Card</span>
+    <span class="vitec-collapse__hint">{data.header}</span>
+    <f:if condition="{data.layout_variant} == 'flipcard'"><span class="vitec-badge">Flip</span></f:if>
+</summary>
+<div class="vitec-collapse__body">
 <div class="vitec-preview vitec-preview--{data.background_variant}">
 
     <f:comment>Thumbnail: image > icon > placeholder</f:comment>
@@ -151,6 +160,8 @@
     </div>
 
 </div>
+</div>
+</details>
 
 </f:section>
 </html>