Merge PR #19553 head and complete issue 19530

The thread details Changes row now reads the same diff preview the
Changes panel opens: the remembered branch base (or Automatic) and the
panel's whitespace toggle, which moves into the session diff panel store
so the row can follow it without new settings or persistence.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
367e9dfb3cJulius Marminge committed on 10/24/2026, 11:26:03 AMparents6ac4c352171c5a
7 files changedLine totals unavailable