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>