fix: image compare node displays wrong height with mismatched resolut… (#10714)

## Summary

Revert `object-cover` to `object-contain` so images are never cropped
when the container is short, and add imagecompare to `EXPANDING_TYPES`
so the widget row grows to fill the full node body instead of collapsing
to `min-content`.


## Screenshots
before
<img width="2674" height="2390" alt="image"
src="https://github.com/user-attachments/assets/8fa5cf41-f393-4a7d-a767-75ce944d00d4"
/>

after




https://github.com/user-attachments/assets/46e1fffc-5f65-4b69-9303-fe6255d9de79

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-10714-fix-image-compare-node-displays-wrong-height-with-mismatched-resolut-3326d73d3650818293d3c716cb8fafb5)
by [Unito](https://www.unito.io)

---------

Co-authored-by: github-actions <github-actions@github.com>

src/renderer/extensions/vueNodes/widgets/components/WidgetImageCompare.test.ts

@@ -58,7 +58,7 @@ describe('WidgetImageCompare Display', () => {
       expect(images[1].attributes('src')).toBe('https://example.com/before.jpg')
 
       images.forEach((img) => {
-        expect(img.classes()).toContain('object-cover')
+        expect(img.classes()).toContain('object-contain')
       })
     })
   })