All snapshots suddenly mismatched

[unional]

Vitest 3.1.2 has made a change to scale the iframe for non-ui case:

vitest-dev/vitest#6512

This cause all headless run to render in a viewport of different dimension, causing all snapshot to fail.

To workaround it, you need to delete the existing snapshots and regenerate them.

[unional]

Due to the scaling, the image comparison threshold may be thrown off.
If you experienced that, please share your experience there and to the Vitest team to see if there is a good approach to address it.