- Add groupName field to ExecutionDetail record and DetailService
- Dashboard: fix TDZ error (rows referenced before definition), add
selectedRow fallback for diagram groupName lookup
- ExchangeDetail: rewrite to match mock layout — auto-select first
processor, Message IN/OUT split panels with header key-value rows,
error panel for failed processors, Timeline/Flow toggle buttons
- Track diagram-mapping utility (was untracked, caused CI build failure)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
