feat: add local database persistence

test/focus_seed_store_test.dart

@@ -0,0 +1,115 @@
+import 'dart:convert';
+
+import 'package:drift/native.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:focus_seed/src/data/focus_seed_store.dart';
+import 'package:focus_seed/src/data/local/focus_seed_database.dart';
+import 'package:focus_seed/src/models/app_state.dart';
+import 'package:focus_seed/src/models/focus_session.dart';
+import 'package:focus_seed/src/models/habit.dart';
+import 'package:focus_seed/src/models/mood.dart';
+import 'package:focus_seed/src/models/reflection_entry.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+void main() {
+  setUp(() {
+    SharedPreferences.setMockInitialValues({});
+  });
+
+  test('new installs seed localized starter habits into sqlite', () async {
+    final database = FocusSeedDatabase(NativeDatabase.memory());
+    addTearDown(database.close);
+    final store = FocusSeedStore(database: database);
+
+    final state = await store.load(
+      defaultHabitTitles: const ['Plan', 'Focus', 'Reflect'],
+    );
+
+    expect(state.anchor, isEmpty);
+    expect(state.habits.map((habit) => habit.title), [
+      'Plan',
+      'Focus',
+      'Reflect',
+    ]);
+  });
+
+  test(
+    'sqlite snapshot round-trips focus, habit, and reflection data',
+    () async {
+      final database = FocusSeedDatabase(NativeDatabase.memory());
+      addTearDown(database.close);
+      final store = FocusSeedStore(database: database);
+      final now = DateTime(2026, 6, 12, 10, 30);
+      final state = AppState(
+        anchor: 'Ship the local database',
+        anchorDateKey: '2026-06-12',
+        habits: [
+          Habit(
+            id: 'habit-1',
+            title: 'Review the plan',
+            createdAt: now.subtract(const Duration(days: 2)),
+            completedDates: const {'2026-06-11', '2026-06-12'},
+          ),
+        ],
+        sessions: [
+          FocusSession(id: 'session-1', minutes: 25, completedAt: now),
+        ],
+        reflections: [
+          ReflectionEntry(
+            id: 'reflection-1',
+            dateKey: '2026-06-12',
+            note: 'Small scope kept it clean.',
+            mood: Mood.clear,
+            createdAt: now.add(const Duration(minutes: 1)),
+          ),
+        ],
+      );
+
+      await store.save(state);
+      final loaded = await store.load();
+
+      expect(loaded.anchor, 'Ship the local database');
+      expect(loaded.anchorDateKey, '2026-06-12');
+      expect(loaded.habits.single.completedDates, {'2026-06-11', '2026-06-12'});
+      expect(loaded.sessions.single.minutes, 25);
+      expect(loaded.reflections.single.note, 'Small scope kept it clean.');
+    },
+  );
+
+  test('legacy shared preferences json migrates once and is removed', () async {
+    final legacyState = AppState(
+      anchor: 'Migrate safely',
+      anchorDateKey: '2026-06-12',
+      habits: [
+        Habit(
+          id: 'habit-legacy',
+          title: 'Keep existing data',
+          createdAt: DateTime(2026, 6, 10),
+          completedDates: const {'2026-06-12'},
+        ),
+      ],
+      sessions: [
+        FocusSession(
+          id: 'session-legacy',
+          minutes: 15,
+          completedAt: DateTime(2026, 6, 12, 8),
+        ),
+      ],
+      reflections: const [],
+    );
+    SharedPreferences.setMockInitialValues({
+      'focus_seed_state_v1': jsonEncode(legacyState.toJson()),
+    });
+    final database = FocusSeedDatabase(NativeDatabase.memory());
+    addTearDown(database.close);
+    final store = FocusSeedStore(database: database);
+
+    final migrated = await store.load();
+    final preferences = await SharedPreferences.getInstance();
+
+    expect(migrated.anchor, 'Migrate safely');
+    expect(migrated.habits.single.title, 'Keep existing data');
+    expect(migrated.sessions.single.minutes, 15);
+    expect(preferences.getString('focus_seed_state_v1'), isNull);
+  });
+}

test/widget_test.dart

@@ -1,6 +1,9 @@
+import 'package:drift/native.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:focus_seed/src/app/focus_seed_app.dart';
+import 'package:focus_seed/src/data/focus_seed_store.dart';
+import 'package:focus_seed/src/data/local/focus_seed_database.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
 void main() {
@@ -14,8 +17,7 @@ void main() {
   });
 
   testWidgets('Today guides the user from intention to focus', (tester) async {
-    await tester.pumpWidget(const FocusSeedApp(locale: Locale('en')));
-    await tester.pumpAndSettle();
+    await pumpFocusSeedApp(tester, locale: const Locale('en'));
 
     expect(find.text('Focus Seed'), findsOneWidget);
     expect(find.text("TODAY'S INTENTION"), findsOneWidget);
@@ -35,8 +37,7 @@ void main() {
   });
 
   testWidgets('bottom navigation exposes Journey and Me', (tester) async {
-    await tester.pumpWidget(const FocusSeedApp(locale: Locale('en')));
-    await tester.pumpAndSettle();
+    await pumpFocusSeedApp(tester, locale: const Locale('en'));
 
     await tester.tap(find.text('Journey'));
     await tester.pumpAndSettle();
@@ -60,8 +61,7 @@ void main() {
       tester.platformDispatcher.clearTextScaleFactorTestValue();
     });
 
-    await tester.pumpWidget(const FocusSeedApp(locale: Locale('en')));
-    await tester.pumpAndSettle();
+    await pumpFocusSeedApp(tester, locale: const Locale('en'));
 
     expect(find.text('Focus Seed'), findsOneWidget);
     expect(find.byType(Scrollable), findsWidgets);
@@ -69,8 +69,7 @@ void main() {
   });
 
   testWidgets('development default uses concise Chinese copy', (tester) async {
-    await tester.pumpWidget(const FocusSeedApp());
-    await tester.pumpAndSettle();
+    await pumpFocusSeedApp(tester);
 
     expect(find.text('Focus Seed'), findsOneWidget);
     expect(find.text('\u4eca\u65e5\u76ee\u6807'), findsOneWidget);
@@ -88,8 +87,7 @@ void main() {
   testWidgets('development language switch changes the active locale', (
     tester,
   ) async {
-    await tester.pumpWidget(const FocusSeedApp());
-    await tester.pumpAndSettle();
+    await pumpFocusSeedApp(tester);
 
     await tester.tap(find.text('\u6211\u7684'));
     await tester.pumpAndSettle();
@@ -102,3 +100,15 @@ void main() {
     expect(find.text('Language'), findsOneWidget);
   });
 }
+
+Future<void> pumpFocusSeedApp(WidgetTester tester, {Locale? locale}) async {
+  final database = FocusSeedDatabase(NativeDatabase.memory());
+  addTearDown(database.close);
+  await tester.pumpWidget(
+    FocusSeedApp(
+      locale: locale,
+      focusSeedStore: FocusSeedStore(database: database),
+    ),
+  );
+  await tester.pumpAndSettle();
+}