Implements the approved X17 case-detail redesign foundation (mockups 18c "A" +
18e "V2"):
- New StatusRail component — the integrated status strip (current-phase chip,
expected-outcome semantic tag, hearing/updated/sync meta inline, agents
Popover, manual-changer Popover) over the 5-phase pipeline stepper. Lives
INSIDE the parchment band (CaseHeader), so status is now visible on EVERY tab
(supersedes the overview-only StatusHero / reverses the prior INV-IA1
overview-only decision, deliberately).
- CaseHeader absorbs the rail and drops its separate hearing/updated/sync dl
(those moved into the rail — no duplication).
- Tabs restyled to the V2 "segmented" look (each tab a pill, active = raised
white card) with per-tab icons.
- Overview tab body is now just documents + agent-activity preview (status left
the body).
- StatusHero deleted — its content moved wholesale into StatusRail, so no
parallel status surface remains (G2).
Reuses the shared StatusChanger / StatusGuide / AgentStatusWidget verbatim
(G2). Design-gate: mockups 18c + 18e approved in Claude Design X17.
tsc --noEmit + eslint clean.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
