fix(statusline): sticky telemetry collection, footer print-through, EOF fix

Responds to Ark0N's review round on the ephemeral-CLI-flag statusline
injection rework:

- Rebase-detail fixes: registry-gated telemetry eligibility via
  getCli(mode)?.capabilities.statusLineTelemetry instead of a hardcoded
  mode === 'claude' check, using the capability flag master's CLI-registry
  refactor already declares for exactly this purpose.

- Design question settled: sticky (a). Rather than persisting the toggle
  as a new field and threading it through every session-creation path
  (cron, Ralph Loop API, quick-start), eliminated the per-session field
  entirely. readPlanUsageTelemetryEnabled() (hooks-config.ts) reads the
  existing showPlanUsageLimits setting fresh from settings.json at every
  claude create/respawn (TmuxManager.createSession/respawnPane) - no
  per-session state to survive a restart, and it applies uniformly to
  every creation path for free, since they all flow through the same
  TmuxManager methods.

  This required fixing a real bug found along the way: showPlanUsageLimits
  was not actually round-tripping through settings.json on save -
  settings-ui.js explicitly excluded it from the PUT body as a pure
  per-device display key. It now flows through normally (both true and
  false); the load-side per-device merge behavior is unchanged.

  Removed entirely as a result: the statusLineTelemetry field from
  CreateSessionSchema/SettingsUpdateSchema, CreateSessionOptions/
  RespawnPaneOptions, Session._statusLineTelemetry (this is what makes
  the restart-persistence bug moot rather than patched), and the
  frontend send sites.

- Footer print-through restored: the no-user-statusline branch of the
  exporter script now runs the telemetry POST in the foreground so its
  own stdout becomes the in-terminal footer, falling back to a plain
  "codeman" marker only on curl failure.

- Background-subshell EOF fix: the wrap-a-real-statusline branch closes
  stdin too, not just stdout/stderr (`>/dev/null 2>&1 </dev/null &`) -
  the un-redirected subshell process itself, not curl, was what held a
  reader-to-EOF's pipe open for however long curl took to finish. Added
  curl --max-time 5 so a hung (not just refused) Codeman cannot wedge
  the render.

Tests: real-shell-execution tests for the footer/EOF fixes (fake curl
stand-in on PATH, real sh subprocess spawns, real elapsed-time
measurements - verified non-vacuous against a hand-reconstructed
old-style script), unit tests for readPlanUsageTelemetryEnabled.
Adapted two existing tests whose payloads referenced the removed field.
Fixed during independent code review: a stray indentation break and a
test exercising the wrong (legacy) exporter code path.

Docs synced: CLAUDE.md, docs/usage-limits-display-plan.md (old
disk-based section marked superseded, kept for history),
docs/architecture-invariants.md.

Full suite green: 352 files, 6780 passed, 12 skipped, 0 failed.
tsc/lint/format:check/frontend-syntax all clean.

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

src/web/routes/session-routes.ts

@@ -947,18 +947,19 @@ export function registerSessionRoutes(
       await updateCaseModel(workingDir, body.modelOverride || null);
     }
 
-    // Plan-usage telemetry request (App Settings → header chip). NO LONGER a
-    // disk write here — a settings.local.json statusLine took precedence over
-    // the user's own global/project statusLine for ANY `claude` run in that
-    // directory, including entirely outside Codeman, with no disclosure and no
-    // way to undo it (real bug, found 2026-08-31). The request now flows
-    // through as an ordinary session field (statusLineTelemetryRequested below)
-    // and Session/TmuxManager resolve it into an EPHEMERAL `claude --settings`
-    // CLI flag at actual spawn time (resolveStatusLineCliCommand in
-    // hooks-config.ts) — never written to disk, so a plain `claude` run outside
-    // Codeman is untouched. That resolution also self-heals: it strips any
-    // legacy disk-written exporter an older Codeman build left behind.
-    const statusLineTelemetryRequested = body.statusLineTelemetry === true;
+    // Plan-usage telemetry (App Settings → header chip): no request-time field
+    // here anymore, and NO disk write — a settings.local.json statusLine used
+    // to take precedence over the user's own global/project statusLine for ANY
+    // `claude` run in that directory, including entirely outside Codeman, with
+    // no disclosure and no way to undo it (real bug, found 2026-08-31).
+    // TmuxManager.createSession reads the persisted `showPlanUsageLimits`
+    // setting FRESH at spawn (readPlanUsageTelemetryEnabled in hooks-config.ts)
+    // and resolves it into an EPHEMERAL `claude --settings` CLI flag — never
+    // written to disk, so a plain `claude` run outside Codeman is untouched —
+    // and applies uniformly to every claude creation path (this route, cron,
+    // the Ralph Loop API, quick-start), not just this one. That resolution
+    // also self-heals: it strips any legacy disk-written exporter an older
+    // Codeman build left behind.
 
     // Hooks for the workspace this session runs in (install vs refresh-only is the
     // `workspaceHooksEnabled` setting; see applyWorkspaceHooks). Never for a remote
@@ -1092,7 +1093,6 @@ export function registerSessionRoutes(
       resumeSessionId: validatedResumeId,
       envOverrides: await clampEnvOverridesForOwner(owner, body.envOverrides),
       effort: body.effort,
-      statusLineTelemetry: statusLineTelemetryRequested,
       tmuxHistoryLimit: terminalHistoryConfig.tmuxHistoryLimit,
       remote,
       owner,