Phase 3.3: topic sensitivity + Phase 3.4: auth foundation

Phase 3.3 — Session Topic Sensitivity (complete):
- Backend: topic_sensitivity column + session_sensitivity_log, sensitivity service
  (flip with one-way-latch + audit), PATCH /api/shared/chat/sessions/:id/topic,
  topic carried in pairing + extension WS payloads, CC filter + sensitive stats
  + per-mitra sensitive columns on activity page
- client_app: TopicSelectionBottomSheet before pricing, topic flows through
  pairing request, silent WS handler for session_topic_updated
- mitra_app: SensitivityBadge + SensitivityTheme + sensitivityConfigProvider,
  overlay badge + yellow accent, chat screen app-bar toggle with configurable
  confirmation + latch, extension card shows current flag, history + transcript
  yellow theme
- control_center: Sensitivitas Topik settings section, topic filter + column
  with inline audit log, sensitive stats dashboard card, mitra activity
  sensitive columns with QC flag

Phase 3.4 — Self-Managed Auth (foundation only):
- Migration: auth_sessions + otp_requests tables, social identity columns on
  customers, password_hash + lockout on control_center_users, OTP + CC lockout
  app_config keys
- New services: password (bcrypt + complexity), token (JWT HS256 + refresh
  rotation, session_id claim pre-wires future Valkey revocation),
  social-identity (Google + Apple JWKS), OTP (Fazpass stub — real API TBD)
- Constants: AuthProvider + OtpChannel
- Middleware, auth route rewrites, WS auth update, Firebase → FCM isolation
  still pending (next chunk); Fazpass docs + Apple Developer setup still
  required before E2E testing

Docs:
- requirement/phase3.3.md, phase3.3-plan.md, phase3.3-testing.md
- requirement/phase3.4.md, phase3.4-plan.md

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

client_app/lib/features/chat/widgets/pricing_bottom_sheet.dart

@@ -2,20 +2,24 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../../core/chat/chat_opening_provider.dart';
 import '../../../core/chat/session_closure_notifier.dart';
+import '../../../core/constants.dart';
 import '../../../core/pairing/pairing_notifier.dart';
 
 class PricingBottomSheet extends ConsumerWidget {
   /// If set, the bottom sheet is in "extension" mode — selecting a tier extends the session.
   final String? extensionSessionId;
 
-  const PricingBottomSheet({super.key, this.extensionSessionId});
+  /// Required when starting a new pairing. Null when in extension mode.
+  final TopicSensitivity? topicSensitivity;
+
+  const PricingBottomSheet({super.key, this.extensionSessionId, this.topicSensitivity});
 
   /// Show for new pairing (from home screen)
-  static Future<void> show(BuildContext context) {
+  static Future<void> show(BuildContext context, {required TopicSensitivity topicSensitivity}) {
     return showModalBottomSheet(
       context: context,
       isScrollControlled: true,
-      builder: (_) => const PricingBottomSheet(),
+      builder: (_) => PricingBottomSheet(topicSensitivity: topicSensitivity),
     );
   }
 
@@ -124,6 +128,7 @@ class PricingBottomSheet extends ConsumerWidget {
       durationMinutes: durationMinutes,
       price: price,
       isFreeTrial: isFreeTrial,
+      topicSensitivity: topicSensitivity ?? TopicSensitivity.regular,
     );
   }