Mitra Bestie §1–§3: shell + Undangan + popup + chat polish

Brings the mitra app to figma-bestie parity for Home (§1), Undangan
inbox with Curhat Baru + Perpanjang tabs (§2), and the incoming-popup
+ active-chat flow (§3). Home now lives inside a StatefulShellRoute
with BestieTabBar so Profil + Undangan + Home share one shell.

- Shell: features/shell/ (StatefulShellRoute, BestieTabBar, 3 branches)
- Undangan: features/undangan/ — Curhat Baru reads
  chatRequestProvider.pendingInvites; row Terima delegates accept to
  the notifier and ChatRequestOverlay owns nav (no double-push).
  Perpanjang tab stubbed (empty state) until backend exposes
  pendingExtensionsProvider.
- Profil: features/profile/ — Bestie-styled stub
- Home: refactored to body-only (shell owns chrome)
- Popup: chat_request_overlay + chat_request_notifier updated to
  serve the list rows, not just the modal
- Chat: mitra_chat_screen polish
- Theme: accentAmber tokens for the Perpanjang tab + halo_orb widget
  (loading spinner used by undangan list states)
- Login: replace broken GoRouterState location guard with
  _expectOtpPush flag — was stacking duplicate /otp pages on OTP
  resend (see project-otp-nav-bug-fixed-2026-05-21)

Maestro:
- 17 new flows under .maestro/flows/ts-mitra-{1,2,3}-* covering home
  online/offline variants, undangan empty/populated/tolak states,
  popup curhat-baru → accept → chat → ended banner, plus popup
  dismiss/expire/cancelled edge cases
- 4 new §A OTP flows (07/08/09/10) for invalid/mismatch/expired/cooldown
- Helper scripts: force_mitra_online/offline, force_pairing_timeout,
  force_session_expires_at, delete_mitra_status_row,
  customer_blast_now (js), customer_cancel_latest_blast
- Backend: POST /internal/_test/delete-mitra-status-row supports the
  "fresh mitra with no status row" test setup

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

mitra_app/.maestro/flows/ts-mitra-A-10-otp_resend_cooldown.yaml

@@ -0,0 +1,65 @@
+# ts-mitra-A-10 — §A.3 60s resend cooldown timer on S3b
+# Spec ref: requirement/flow_mitra.mermaid.md §A.3
+#
+# After arriving on S3b the local timer (otp_screen.dart::_startCooldown,
+# 60s default) keeps the resend tap disabled. The label cycles
+# "kirim ulang dalam Ns" → "kirim ulang kode" once the cooldown reaches 0.
+#
+# What we test (deterministically, without waiting 60s in CI):
+#   1. On first land, the label reads "kirim ulang dalam Ns" (disabled state)
+#   2. The label is NOT "kirim ulang kode" yet
+#
+# The 60-second wait + enabled-tap + resend-fires-new-request branch is
+# documented but skipped — a `waitForAnimationToEnd: { timeout: 65000 }`
+# wedge would block the CI for a full minute on every run. Reasonable trade:
+# the post-resend behavior is exercised by ts-mitra-A-06's full back-and-
+# retry path, which uses reset_phone.js (the server-side equivalent of "the
+# 60s passed and the cooldown is gone").
+appId: com.mybestie.mitra
+env:
+  TEST_PHONE: "+628200000a10"
+  MITRA_DISPLAY_NAME: "Maestro Cooldown"
+  BACKEND_INTERNAL_URL: http://localhost:3001
+---
+- runScript:
+    file: ../scripts/seed_mitra.js
+    env:
+      TEST_PHONE: ${TEST_PHONE}
+      MITRA_DISPLAY_NAME: ${MITRA_DISPLAY_NAME}
+      IS_ACTIVE: "true"
+      BACKEND_INTERNAL_URL: ${BACKEND_INTERNAL_URL}
+- runScript:
+    file: ../scripts/reset_phone.js
+    env:
+      TEST_PHONE: ${TEST_PHONE}
+      BACKEND_INTERNAL_URL: ${BACKEND_INTERNAL_URL}
+
+- launchApp:
+    clearState: true
+- extendedWaitUntil:
+    visible:
+      text: "(?s).*Halo Mitra Bestie.*"
+    timeout: 10000
+
+# S3a → S3b
+- tapOn:
+    point: "50%, 53%"
+- inputText: "8200000a10"
+- tapOn: "(?s).*kirim kode.*"
+- extendedWaitUntil:
+    visible:
+      text: "(?s).*masukin 6 digit kode.*"
+    timeout: 10000
+
+# Cooldown label is visible immediately on mount — "kirim ulang dalam Ns".
+# Tolerate either digit count (60s → 1s) by matching the "dalam" word + the
+# trailing 's'.
+- extendedWaitUntil:
+    visible:
+      text: "(?s).*kirim ulang dalam.*s.*"
+    timeout: 5000
+
+# The enabled label "kirim ulang kode" (no "dalam") must NOT be visible.
+- assertNotVisible: "(?s).*kirim ulang kode.*"
+
+- takeScreenshot: ts-mitra-A-10-cooldown-disabled