The session variant that Phase 1 L1 users actually hit (intake creates
adhoc sessions when no flow_id is provided). Single-pane note-taking
surface with 300ms-debounced autosave to walk_notes. Shares header
shape + Resolve/Escalate modals with the tree variant. Splits the
notes textarea by paragraph and persists each as a structured
AdhocNote entry. Stops saving once status leaves 'active'.
L1WalkPage now dispatches both variants.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Replaces the T20 stub. WalkPage dispatches by session_kind:
- 'flow' / 'proposal' → L1WalkTreeVariant (this commit)
- 'adhoc' → placeholder until T23
L1WalkTreeVariant: sticky header with back link + AI-built badge +
persistent Escalate/Resolve buttons; two-pane body (current step
yes/no card on left, walked-path transcript on right). ResolveModal
and EscalateModal extracted to shared WalkModals.tsx (T23 reuses).
Phase 1 caveat: this surface isn't reached by user-driven intake
(which creates adhoc sessions only). It's exercised via direct URL
or integration tests until Phase 2 wires match_or_build.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
L1RouteGuard wraps the new routes and redirects users without
canUseL1Surface back to /. Page components are stubs in this task
(real UI in T21-T24): L1Dashboard, L1WalkPage, L1DraftsPage,
L1TicketsPage.
Routes: /l1, /l1/walk/:sessionId, /l1/drafts, /l1/tickets — all gated.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
