The Changes tab now shows committed-but-not-submitted changelists as cards
above the working set: expandable to their files (click to preview), each
with per-CL Submit, plus Edit description / Uncommit (reopen -c default) /
Discard in a ⋯ menu, and a Submit-all button. Backend adds p4_reopen_default
and p4_set_desc; a small text-prompt modal edits descriptions. Preview panel
now shows either the working selection or a clicked pending-CL file.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>