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-2-01-curhat_baru_empty_state.yaml

@@ -0,0 +1,74 @@
+# ts-mitra-2-01 — §2 Undangan: Curhat Baru tab empty state
+# Spec ref: requirement/flow_mitra.mermaid.md §2 + figma BestieInvites (v4.jsx)
+#
+# Walks: login → home → tap Chat tab in BestieTabBar → assert Undangan
+# screen renders, two tab labels visible, Curhat Baru is the default active
+# tab and shows the empty state copy.
+#
+# This test does NOT fire a customer blast — the goal is the empty-state
+# layout. ts-mitra-2-03 covers the populated case.
+appId: com.mybestie.mitra
+env:
+  TEST_PHONE: "+628200000801"
+  MITRA_DISPLAY_NAME: "Maestro Undangan Empty"
+  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
+
+- tapOn:
+    point: "50%, 53%"
+- inputText: "8200000801"
+- tapOn: "(?s).*kirim kode.*"
+- extendedWaitUntil:
+    visible:
+      text: "(?s).*masukin 6 digit kode.*"
+    timeout: 10000
+- runScript:
+    file: ../scripts/peek_otp.js
+    env:
+      TEST_PHONE: ${TEST_PHONE}
+      BACKEND_INTERNAL_URL: ${BACKEND_INTERNAL_URL}
+- inputText: ${output.OTP}
+
+- extendedWaitUntil:
+    visible:
+      text: "(?s).*Kamu lagi (ONLINE|OFFLINE).*"
+    timeout: 15000
+
+# Tap Chat tab in the bottom BestieTabBar. The label text is "Chat" — the
+# Home variant doesn't render that string elsewhere on screen so the regex
+# match is unique.
+- tapOn: "(?s).*Chat.*"
+
+# Undangan screen renders with both tabs visible. Default active tab is
+# Curhat Baru → empty state copy is visible.
+- extendedWaitUntil:
+    visible:
+      text: "(?s).*Undangan.*"
+    timeout: 8000
+- assertVisible:
+    text: "(?s).*Curhat Baru.*"
+- assertVisible:
+    text: "(?s).*Perpanjang Curhat.*"
+- assertVisible:
+    text: "(?s).*Belum ada undangan masuk.*"
+
+- takeScreenshot: ts-mitra-2-01-curhat-baru-empty