## Summary
Backports #12212 to `cloud/1.43` so paste/drop media uploads clear
missing media validation rings through the widget change path.
## Changes
- **What**: Cherry-picked `95e616b89404fe2bda5be4dc6194aeac07a65a0b` and
adapted the Vue node error E2E conflict for the 1.43 test helper API.
- **Dependencies**: None.
## Review Focus
Conflict resolution was limited to
`browser_tests/tests/vueNodes/nodeStates/error.spec.ts`. The 1.43 branch
does not have the newer Vue node error helpers from `main`, so the
backport keeps the existing 1.43 tests and adds only the Load Image
drop/paste missing-media clearing coverage using local prompt route
mocking plus `getNodeLocator()` / `getWidget(0)`.
Backport of #12212.
## Screenshots (if applicable)
N/A
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-12246-backport-cloud-1-43-fix-clear-media-upload-errors-via-widget-change-12212-3606d73d365081cd9074d2bb0c1e9e74)
by [Unito](https://www.unito.io)
41b258e023