feat: User/onboarding persistence — save to DB, load on startup [AITM-233]

lib/core/router/routes.dart

@@ -4,4 +4,5 @@ abstract final class Routes {
   static const pet = '/pet';
   static const zen = '/zen';
   static const profile = '/profile';
+  static const onboarding = '/onboarding';
 }

lib/features/tasks/providers/pet_providers.dart

@@ -3,6 +3,7 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../../domain/entities/pet_state_entity.dart';
 import '../../../domain/entities/pet_type.dart';
 import '../../../domain/entities/user_entity.dart';
+import 'task_providers.dart';
 
 /// Pet mood states.
 enum PetMood {

lib/features/tasks/providers/task_providers.dart

@@ -2,8 +2,10 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 
 import '../../../data/db/app_database.dart';
 import '../../../data/repositories/task_repository.dart';
+import '../../../data/repositories/user_repository.dart';
 import '../../../domain/entities/task_entity.dart';
 import '../../../domain/entities/task_status.dart';
+import '../../../domain/entities/user_entity.dart';
 
 // ── Infrastructure providers ──
 
@@ -19,6 +21,17 @@ final taskRepositoryProvider = Provider<TaskRepository>((ref) {
   return TaskRepository(ref.watch(appDatabaseProvider));
 });
 
+/// User repository backed by Drift.
+final userRepositoryProvider = Provider<UserRepository>((ref) {
+  return UserRepository(ref.watch(appDatabaseProvider));
+});
+
+/// Current user loaded from the database. Null if onboarding not complete.
+final currentUserProvider = FutureProvider<UserEntity?>((ref) {
+  final repo = ref.watch(userRepositoryProvider);
+  return repo.getCurrentUser();
+});
+
 // ── Task list (reactive stream from DB) ──
 
 const _userId = 'user-1';