* fix: render Kitty Unicode placeholder images with bounded ownership
* Make image repaint checks independent of display profile and shell output
* Capture repaint diagnostics only after the pixel assertion fails
* chore: upgrade terminal dependencies to the matching payload betas
* test: harden xterm payload contract, align mobile pins, fix serialize-at-ref across version bumps
- Cover foreign-payload replacement and the shared blank-cell reset in the
installed image payload contract (both mutants previously survived).
- Bump mobile's xterm, webgl and unicode11 pins to the root's betas.
- Resolve the ref's own serialize version and patch so the differential
fuzz baseline builds across a version bump.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Neil
