Phase 4 Stage 10 follow-up: restore BestieHistoryList picker for §4 curhat-lagi

The original Stage 10 plan retired chat_history_screen.dart on the
assumption that the new Chat tab Selesai sub-tab replaced it. That was
wrong: Figma has two distinct screens — `extras.jsx::SChatList` (the
Chat tab, browse-only) and `v4.jsx::BestieHistoryList` (the picker for
mermaid §4 returning-user curhat-lagi). They serve different purposes
on row tap: Selesai opens transcript, BestieHistoryList picks a past
bestie for targeted-pair.

Restoring BestieHistoryList at a new home:

- New screen `features/home/screens/bestie_history_list_screen.dart`
  matching Figma `v4.jsx::BestieHistoryList`:
    appBar title "bestie kamu sebelumnya"
    subtitle "{N} bestie yang pernah nemenin kamu"
    row: orb + "bestie {name}" + ONLINE pill + sessions count + last
         date + topic + → arrow
    row tap (online) → /payment with targetedMitraId (Stage-3 flow)
    row tap (closing-grace) → /chat/session/$id to finish goodbye
    row (offline) → dimmed, tap disabled

  Drops the per-row "curhat lagi" secondary button — the row tap IS the
  pick action now (cleaner, matches Figma).

- New route `/bestie/history` in router.dart; cleanly separated from the
  /chat/* family (which is now exclusively the Chat tab).

- BestieChoiceSheet "bestie yang udah kenal" re-pointed from /chat to
  /bestie/history.

- Stage 8 Maestro flow `08_returning_targeted.yaml` updated to assert
  the new screen title + tap the row by name (uses output.MITRA_NAME
  from the seed_history_session script).

- TECH_DEBT entry retired (curhat-lagi entry point restored). New
  TECH_DEBT entry tracks the still-pending wire-up of the Bestie
  Offline Popup variant for offline-row tap per mermaid §4.

flutter analyze clean (one pre-existing widget_test scaffolding error
unrelated to Stage 10).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

TECH_DEBT.md

@@ -61,22 +61,22 @@ the buttons have nowhere to live.
 - `loginGoogle` / `loginApple` on `authProvider` are still intact, so the
   wiring is one button widget away.
 
-### `[2026-05-12]` Stage 10 — "curhat lagi" entry point lost; Stage 8 Maestro flow broken
+### `[2026-05-12]` Stage 10 — Bestie Offline Popup variant not wired on BestieHistoryList
 
-**Files:** `client_app/lib/features/home/widgets/bestie_choice_sheet.dart` (line ~54, now routes to `/chat`); `client_app/.maestro/flows/08_returning_targeted.yaml` (asserts "Riwayat Chat" + "curhat lagi" which no longer render).
+**File:** `client_app/lib/features/home/screens/bestie_history_list_screen.dart`
 
-**Decision:** Stage 10 retired `chat_history_screen.dart` and re-pointed the BestieChoiceSheet "bestie yang udah kenal" CTA at `/chat` (which redirects to `/chat/aktif`). The Selesai sub-tab matches Figma `SChatList` — transcript-only, no per-row "curhat lagi" button.
+**Decision:** Stage 10 follow-up restored `BestieHistoryList` as a separate
+picker screen (per mermaid §4) and made offline rows un-tappable (dimmed).
+Mermaid §4 actually calls for a **Bestie Offline Popup (returning variant)**
+to surface when the user picks an offline bestie — with options "cari bestie
+lain" and "tanya admin".
 
-**Why it's debt:** The "curhat lagi" targeted-payment entry point lived only on the deleted history screen (line 213 `label: 'curhat lagi'` → `context.push('/payment', extra: { 'targetedMitraId': ... })`). After Stage 10 there is **no** UI affordance to start a targeted payment against a known mitra from the customer app — only the general "Mulai Curhat → blast" path. The targeted-payment plumbing in `payment_notifier.dart` / `payment_screen.dart` is now orphaned (still wired, no caller).
+**Why it's debt:** Today the offline row is just disabled. The user gets no
+explicit prompt to redirect them into the blast flow or to contact admin.
 
-Side-effect: `08_returning_targeted.yaml` (Stage 8) expects to navigate from BestieChoiceSheet → bestie-history list → "curhat lagi" tap → targeted payment. The middle screen is gone; the flow will fail at `assertVisible: "Riwayat Chat"`.
-
-**Fix options (pick one with product):**
-- **A.** Add a "curhat lagi" secondary CTA on Selesai rows (deviates from Figma SChatList but restores the feature). Update `08_returning_targeted.yaml` to navigate `/chat/selesai → tap row's curhat-lagi → targeted payment`.
-- **B.** Keep Selesai as transcript-only per Figma; reintroduce a "pick a past bestie" picker reachable from BestieChoiceSheet (essentially restore `chat_history_screen.dart` under a new name + route, kept separate from the Chat tab).
-- **C.** Drop the "curhat lagi" feature entirely. Update mermaid + BestieChoiceSheet copy to remove the "bestie yang udah kenal" branch. Delete orphaned targeted-payment plumbing.
-
-Until decided, `08_returning_targeted.yaml` should be marked `.skip` or the Stage 8 flow rewritten against the new home → SHomeReturning history list (which DOES still render bestie rows via `bestieHistoryProvider`, but those rows tap-through to transcripts only — same "no curhat lagi" gap).
+**Fix:** wire `BestieOfflinePopup` with `variant='returning'` on offline-row
+tap. The popup widget already exists from Stage 8 (Tanya Admin sheet ships
+with the wiring); just needs to be triggered here.
 
 ### `[2026-05-12]` S5 ESP screen retired from spec — code still ships it