## Summary
Make image preview keyboard accessible, set the key listener on the node
itself for more robust and intuitive handling, also add better aria
labels.
Follow up PR: same on Video preview.
## Changes
- **What**: LGraphNode.vue, ImagePreview.vue
- **Breaking**: <!-- Any breaking changes (if none, remove this line)
-->
- **Dependencies**: <!-- New dependencies (if none, remove this line)
-->
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7252-fix-image-preview-a11y-2c46d73d3650815b9496f3d36a8942bf)
by [Unito](https://www.unito.io)
## Summary
To prevent the flash of "loading..." and "calculating dimensions" when
loading cached images only set loading set if longer than 250ms
## Changes
- **What**: ImagePreview.vue
- **Breaking**: <!-- Any breaking changes (if none, remove this line)
-->
- **Dependencies**: <!-- New dependencies (if none, remove this line)
-->
## Review Focus
<!-- Critical design decisions or edge cases that need attention -->
<!-- If this PR fixes an issue, uncomment and update the line below -->
<!-- Fixes #ISSUE_NUMBER -->
## Screenshots (if applicable)
The retrigger loading is because i have throttled 4g slow in the demo.
So cache takes time. Normally this doesn't happen.
https://github.com/user-attachments/assets/335ca7e4-4ce1-43dd-b7d0-9ee88e187069
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7268-fix-loading-state-to-show-loader-only-if-it-takes-more-than-150ms-2c46d73d365081a6b311f78ba3e1cffd)
by [Unito](https://www.unito.io)
Selecting a new image from a batch sets isLoading to true, but
handleImageLoad is never triggered so the image never displays.
Swapping to a different image from a batch is currently the only place
isLoading is set to true. This change, even if temporary, results in a
good chunk of dead code.
To my understanding, ImagePreviews are always object URLs and should
never need to load, so I don't foresee the loading placeholder being
needed here.
Resolves#6458
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6521-Fix-inability-to-select-image-from-batch-in-vue-29e6d73d36508162abeaeece7c5e0eed)
by [Unito](https://www.unito.io)
