command hq: web frontend v1 — nav, grid, detail

Builds the Workspace/Panel screen the design doc's "Layout, v1" described but
nothing had implemented yet: /command-hq and /command-hq/:sessionId, three
always-mounted panels (officerdev/src/apps/CommandHQ/) — a flat category nav
filtering the grid via ?category=, a commander grid reading GET /commanders,
and a detail pane that is either an empty state, the new-commander composer, or
the selected commander's resumed transcript.

Follows the frontend route conventions in CLAUDE.md throughout: Workspace/Panel
framework (locked, three fixed panels, no standalone screen), category and
session both addressable in the URL rather than a channel, real <Link>s for
every row and card, a route pair (/command-hq + /command-hq/:sessionId) the
same shape as /chat's.

The composer reuses the exact mechanism /chat already uses to create a
commander — an ordinary turn with context: 'command-hq' via useChat/
EmbeddableChat — rather than the mobile-only POST /commanders/new HTTP route.
Once the harness reports a real transcript id the URL is replaced onto it
(useChat's own permalink writes /chat/<id>, which is the wrong screen here, so
that's done by hand). fileAsCommander always files a new commander
uncategorised — it has no way to know a category was selected in the composer
— so if one was, a client-side PATCH sets it after the fact, the same race
POST /commanders/new already resolves server-side for mobile, just resolved
here on the client instead.

The detail panel's transcript resume mirrors ChatPanelWrapper's fetch-then-
mount pattern (GET /chat/sessions/:id first, then useChat with
resumeSessionId + initialMessages + paginate) rather than reusing it directly
— Command HQ's version is simpler (no dashboard/agent-panel concerns) and
scopes rename/category/disarm through Command HQ's own PATCH route rather
than /chat's, since a commander lives in a different directory than an
ordinary chat session.

Card status is the three-state read COMMS/command-hq/mobile-4.md proposed and
the design record adopted: green running, amber armed-but-not-running (the
watcherArmed && !running pair that makes a silently-dead watcher visible),
grey neither.

Registered in AppRegistry.tsx, re-exported from officerdev's barrel (route
helpers + types, per CLAUDE.md's rule for anything an officer-web screen
needs), a CORE_DOCK_ITEMS tile (not in DEFAULT_DOCK_PATHS — opt-in via the
Dock settings screen, same as Jobs/Monitor/Activity), and a usePageTitle rule.

bunx tsgo clean, suite at its 7 pre-existing baseline failures, none of them
this feature's. NOT yet clicked through against a running server — the
composer's redirect-on-real-id, the disarm button, the category-race PATCH
have all typechecked and nothing more. That's the next real test.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/apps/officer-web/state/usePageTitle.ts

@@ -26,6 +26,7 @@ const RULES: TitleRule[] = [
   { match: (p) => p.startsWith('/photos'), title: 'Photos' },
   { match: (p) => p.startsWith('/jellyfin'), title: 'Video' },
   { match: (p) => p.startsWith('/soulseek'), title: 'Soulseek' },
+  { match: (p) => p.startsWith('/command-hq'), title: 'Command HQ' },
   { match: (p) => p.startsWith('/transmission'), title: 'Transmission' },
   { match: (p) => p.startsWith('/gitea'), title: 'Gitea' },
   { match: (p) => p.startsWith('/invoices'), title: 'Invoices' },