feat: add local-first private AI digest workflow

Migrate app code into canonical feature slices, add phone-only AI digest scheduling and review, wire local notification/background task support, and cover the flow with tests.

lib/features/local/storage/README.md

@@ -0,0 +1,4 @@
+# Legacy Local Storage Exports
+
+These files exist as compatibility exports while the canonical storage layer has
+moved to `lib/app/data/storage/`. Prefer editing the app-layer storage files.

lib/features/local/storage/local_data_store.dart

@@ -1,19 +1,2 @@
-/// Raw local state payload and associated schema version.
-class LocalDataRecord {
-  const LocalDataRecord({required this.rawState, required this.schemaVersion});
-
-  final String rawState;
-  final int schemaVersion;
-}
-
-/// Persistence boundary for local app state.
-abstract interface class LocalDataStore {
-  /// Reads latest persisted state payload.
-  Future<LocalDataRecord?> read();
-
-  /// Writes state payload and schema version.
-  Future<void> write({required String rawState, required int schemaVersion});
-
-  /// Clears persisted state payload.
-  Future<void> clear();
-}
+// Legacy compatibility export for the app storage contract.
+export 'package:relationship_saver/app/data/storage/local_data_store.dart';

lib/features/local/storage/local_data_store_hive.dart

@@ -1,54 +1,2 @@
-import 'package:hive_flutter/hive_flutter.dart';
-import 'package:relationship_saver/features/local/storage/local_data_store.dart';
-
-/// Hive-backed local store for future DB migration path.
-class HiveLocalDataStore implements LocalDataStore {
-  static const String _boxName = 'relationship_saver_local';
-  static const String _stateKey = 'state_json';
-  static const String _schemaVersionKey = 'schema_version';
-
-  static bool _initialized = false;
-
-  @override
-  Future<void> clear() async {
-    final Box<dynamic> box = await _openBox();
-    await box.delete(_stateKey);
-    await box.delete(_schemaVersionKey);
-  }
-
-  @override
-  Future<LocalDataRecord?> read() async {
-    final Box<dynamic> box = await _openBox();
-    final String? rawState = box.get(_stateKey) as String?;
-    if (rawState == null || rawState.isEmpty) {
-      return null;
-    }
-
-    final int schemaVersion =
-        (box.get(_schemaVersionKey) as num?)?.toInt() ?? 0;
-    return LocalDataRecord(rawState: rawState, schemaVersion: schemaVersion);
-  }
-
-  @override
-  Future<void> write({
-    required String rawState,
-    required int schemaVersion,
-  }) async {
-    final Box<dynamic> box = await _openBox();
-    await box.put(_stateKey, rawState);
-    await box.put(_schemaVersionKey, schemaVersion);
-  }
-
-  Future<Box<dynamic>> _openBox() async {
-    if (!_initialized) {
-      await Hive.initFlutter();
-      _initialized = true;
-    }
-
-    if (!Hive.isBoxOpen(_boxName)) {
-      return Hive.openBox<dynamic>(_boxName);
-    }
-
-    return Hive.box<dynamic>(_boxName);
-  }
-}
+// Legacy compatibility export for the Hive local data store.
+export 'package:relationship_saver/app/data/storage/local_data_store_hive.dart';

lib/features/local/storage/local_data_store_in_memory.dart

@@ -1,22 +1,2 @@
-import 'package:relationship_saver/features/local/storage/local_data_store.dart';
-
-/// In-memory local store for deterministic tests.
-class InMemoryLocalDataStore implements LocalDataStore {
-  LocalDataRecord? _record;
-
-  @override
-  Future<void> clear() async {
-    _record = null;
-  }
-
-  @override
-  Future<LocalDataRecord?> read() async => _record;
-
-  @override
-  Future<void> write({
-    required String rawState,
-    required int schemaVersion,
-  }) async {
-    _record = LocalDataRecord(rawState: rawState, schemaVersion: schemaVersion);
-  }
-}
+// Legacy compatibility export for the in-memory local data store.
+export 'package:relationship_saver/app/data/storage/local_data_store_in_memory.dart';

lib/features/local/storage/local_data_store_provider.dart

@@ -1,14 +1,2 @@
-import 'package:flutter_riverpod/flutter_riverpod.dart';
-import 'package:relationship_saver/core/config/app_config.dart';
-import 'package:relationship_saver/features/local/storage/local_data_store.dart';
-import 'package:relationship_saver/features/local/storage/local_data_store_hive.dart';
-import 'package:relationship_saver/features/local/storage/local_data_store_shared_prefs.dart';
-
-/// Chooses local persistence backend for app state.
-final Provider<LocalDataStore> localDataStoreProvider =
-    Provider<LocalDataStore>((Ref ref) {
-      if (AppConfig.useHiveLocalDb) {
-        return HiveLocalDataStore();
-      }
-      return SharedPrefsLocalDataStore();
-    });
+// Legacy compatibility export for the local data store provider.
+export 'package:relationship_saver/app/data/storage/local_data_store_provider.dart';

lib/features/local/storage/local_data_store_shared_prefs.dart

@@ -1,44 +1,2 @@
-import 'package:relationship_saver/features/local/storage/local_data_store.dart';
-import 'package:shared_preferences/shared_preferences.dart';
-
-/// shared_preferences-backed local store used as stable default.
-class SharedPrefsLocalDataStore implements LocalDataStore {
-  SharedPrefsLocalDataStore({
-    this.stateKey = 'local_data_state_v1',
-    this.schemaVersionKey = 'local_data_schema_version',
-  });
-
-  final String stateKey;
-  final String schemaVersionKey;
-
-  @override
-  Future<void> clear() async {
-    final SharedPreferences prefs = await SharedPreferences.getInstance();
-    await prefs.remove(stateKey);
-    await prefs.remove(schemaVersionKey);
-  }
-
-  @override
-  Future<LocalDataRecord?> read() async {
-    final SharedPreferences prefs = await SharedPreferences.getInstance();
-    final String? rawState = prefs.getString(stateKey);
-    if (rawState == null || rawState.isEmpty) {
-      return null;
-    }
-
-    return LocalDataRecord(
-      rawState: rawState,
-      schemaVersion: prefs.getInt(schemaVersionKey) ?? 0,
-    );
-  }
-
-  @override
-  Future<void> write({
-    required String rawState,
-    required int schemaVersion,
-  }) async {
-    final SharedPreferences prefs = await SharedPreferences.getInstance();
-    await prefs.setString(stateKey, rawState);
-    await prefs.setInt(schemaVersionKey, schemaVersion);
-  }
-}
+// Legacy compatibility export for the shared preferences local store.
+export 'package:relationship_saver/app/data/storage/local_data_store_shared_prefs.dart';