Mitra §A: pre-home (S3a/S3b/AccountInactive) + design system + Bestie Home

- Port halo_tokens + halo_theme + HaloButton to mitra_app (rose palette,
  Bricolage display, Poppins body, JetBrainsMono).
- Build S3a Input WhatsApp (figma-bestie BestieS3 first half) with
  +62 chip, leading-zero/62 normalization, allow '+' in input.
- Build S3b OTP verification (6-digit, 60s resend timer, attempts hint,
  Focus(canRequestFocus:false) for maestro inputText compat) with full
  error branching (CODE_MISMATCH, OTP_EXPIRED, OTP_USED, ATTEMPTS_EXCEEDED,
  WRONG_FLOW, ACCOUNT_INACTIVE).
- Add AccountInactive terminal screen for is_active=false mitras.
- Typed MitraAuthError with Indonesian-first localized messages +
  retryAfterSeconds passthrough.
- Rebuild home_screen.dart to match figma BestieHome (greeting + status
  card + Ganti Status CTA + Pengingat + 2-tile dark grid).
- Backend: POST /internal/_test/seed-mitra (idempotent) and
  PATCH /internal/mitras/:id (display_name update).
- Control center: inline Edit Nama on mitras row + expandable inline log
  table under clicked mitra (vs old below-table panel).
- 5 maestro flows ts-mitra-A-01/03/04/05/06 covering invalid input, happy
  path, account inactive, phone-format normalization, and the back-to-S3a
  regression. All green.

Plan + memory documented in:
- requirement/phase4-mitra-prehome-plan.md
- requirement/flow_mitra.md / flow_mitra.mermaid.md §A

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

mitra_app/lib/features/auth/screens/account_inactive_screen.dart

@@ -0,0 +1,83 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:go_router/go_router.dart';
+import '../../../core/auth/auth_notifier.dart';
+import '../../../core/theme/halo_tokens.dart';
+import '../../../core/theme/widgets/widgets.dart';
+
+/// Terminal state shown when OTP verification succeeds but the mitra's
+/// account is not yet approved (`ACCOUNT_INACTIVE` 403 from the backend).
+///
+/// Mitras are onboarded internally and reach out via their existing
+/// internal channel — no public WhatsApp/Telegram CTAs here.
+class AccountInactiveScreen extends ConsumerWidget {
+  const AccountInactiveScreen({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    return PopScope(
+      canPop: false,
+      child: Scaffold(
+        backgroundColor: HaloTokens.bg,
+        body: SafeArea(
+          child: Padding(
+            padding: const EdgeInsets.fromLTRB(28, 8, 28, 28),
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.stretch,
+              children: [
+                const Expanded(
+                  child: Column(
+                    mainAxisAlignment: MainAxisAlignment.center,
+                    crossAxisAlignment: CrossAxisAlignment.stretch,
+                    children: [
+                      Center(
+                        child: Text(
+                          '⏳',
+                          style: TextStyle(fontSize: 56),
+                        ),
+                      ),
+                      SizedBox(height: 24),
+                      Text(
+                        'akun belum aktif',
+                        textAlign: TextAlign.center,
+                        style: TextStyle(
+                          fontFamily: HaloTokens.fontDisplay,
+                          fontSize: 28,
+                          fontWeight: FontWeight.w700,
+                          color: HaloTokens.brandDark,
+                          height: 1.15,
+                          letterSpacing: -0.56,
+                        ),
+                      ),
+                      SizedBox(height: 12),
+                      Text(
+                        'tim halobestie sedang memverifikasi akun kamu. '
+                        'hubungi koordinator kalau butuh update.',
+                        textAlign: TextAlign.center,
+                        style: TextStyle(
+                          fontFamily: HaloTokens.fontBody,
+                          fontSize: 14.5,
+                          color: HaloTokens.inkSoft,
+                          height: 1.5,
+                        ),
+                      ),
+                    ],
+                  ),
+                ),
+                HaloButton(
+                  label: 'pakai nomor lain',
+                  variant: HaloButtonVariant.secondary,
+                  fullWidth: true,
+                  onPressed: () async {
+                    await ref.read(mitraAuthProvider.notifier).logout();
+                    if (context.mounted) context.go('/login');
+                  },
+                ),
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}