PR: #354: [Story-1383] Wire matter-shell chrome into live /matters/[id] by @ankitmaheshwari-com

Story 1383 · EPIC-006 Matter Shell

Wire the matter-shell chrome into the live `/matters/[id]`

Story-1382 built MatterDetailHeader + MatterRightRail in Storybook. This puts them on the live matter-detail route against real MatterDetailView data, replacing the old LiveMatterDetailPage header + summary. No faked data.

Composition

New client LiveMatterShell = sticky MatterDetailHeader + [ main body | MatterRightRail ].
page.tsx demo path is untouched; the live path now fetches only mattersGateway.get() and renders the shell. The old heavy fetches (proceedings, related matters, documents, carry-forward, forums) and their bound actions were removed — nothing renders them now that the Brief body is blank.
MatterDetailHeader.agent made optional — the matter-type-lead agent is not in the payload, so the pill is omitted (not faked).

Data mapping — `MatterDetailView` → chrome

Prop	Source
header matterRef / title / status	`matter.matterRef` / `.title` / `.status` (enum is identical, no map)
header proceedingCount · lens label	`matter.proceedings.length` · localized "All proceedings"
header agent	omitted (not in payload — follow-up)
rail caseRef / status / proceedingsCount	direct; lifecycle = `status==="closed" ? closed : active`
rail leadCounsel / forum	`null` → em-dash (team + per-proceeding forum not in payload — follow-up)

Brief body — intentionally blank

Per the matter-shell design the tab bodies are TipTap surfaces built later; for this PR the Brief body renders empty (the old summary / operating-model / proceedings / related-matters / carry-forward UI was removed from this route). Other tabs show a localized placeholder. briefBody stays as the documented seam for when the brief content lands.

Verification live

New MatterDetail keys (allProceedings, tabPlaceholder) added to both en.json + hi.json. (Caught + fixed an insert that first landed in the wrong namespace — the lens chip rendered the raw key until corrected.)
Verified live on /matters/M-0004 (LIVE DB): header (M-004 crumb · serif title · Discovery pill · ⌘K search · 7 tabs · "All proceedings 1 ▾" lens) + the Matter-administration rail (Lead counsel / Forum / Case ref em-dash, Status Discovery, Proceedings 1·manage, Open/close Active) + icon strip, with a blank Brief body.
pnpm lint 0 errors · pnpm build green · tokens only.

Out of scope (later PRs)

URL-driven tab routing; per-tab body content (sub-nav + TipTap); wiring the matter-type-lead agent, lead counsel, and per-proceeding forum once they land in the detail payload.

Files changed

6 file(s), +91 / -104 lines