Replace the ambiguous inline "T-1 ← T-9" id row on ticket cards with a
small tree: the parent renders as a muted, clickable breadcrumb above, and
the card's own ticket sits below it under a "└" connector in bold — so it's
clear which id is the subject and which is its parent. Tapping the parent
selects it.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>