Customer-driven session end flow:
- AppBar 'akhiri' action on chat_screen (visible when connected and
not already closing).
- Tap fires confirm_end_step1 HaloPopup. lanjut akhiri -> step2;
gak jadi balik -> dismiss, stay in chat.
- confirm_end_step2 HaloPopup. tulis pesan penutup -> closing_message_sheet
HaloBottomSheet (textarea + kirim & akhiri / lewat — langsung akhiri).
lewati saja closes immediately.
- Both close paths POST /api/client/session/:sessionId/end via
session_closure_notifier.closeSession() and route to /chat/thank-you.
- 409 from the close endpoint surfaces a ClosureRejectedByMitraData
state and a stub HaloPopup with TODO(stage8) for the BestieOfflinePopup
returning variant.
Removed the legacy _showSessionExpiredDialog modal — Stage 6's
ChatExpiredBanner is the replacement notification.
Inline _buildGoodbyeView retained with a TODO for the mitra-side early
end flow (still reaches it).
endSessionTwoStepConfirmProvider hardcoded to true with a TODO — the
Stage 1.5 app_config row exists but no client-readable config endpoint
exists yet. Flip the provider to a FutureProvider once the read endpoint
ships.
Maestro 07_end_session_2step.yaml chains after the chat-happy flow
and asserts the Indonesian copy at each step.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
