Add daily streak system and normalize bundle id to com.airkjw.blockseasons

Pure advanceStreak (1-day grace none, milestone flags at 3/7/14/30),
persisted in the save blob; StreakNotifier advances on every finished
attempt; home screen flame chip and milestone snackbar. Fix flutter
create's camelCased iOS bundle id and underscored Android application
id to the agreed lowercase form before any store registration.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

test/widget_test.dart

@@ -1,10 +1,21 @@
-import 'package:flutter_test/flutter_test.dart';
-
 import 'package:block_seasons/app.dart';
+import 'package:block_seasons/data/save_repository.dart';
+import 'package:block_seasons/state/providers.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 
 void main() {
   testWidgets('home screen shows title and play button', (tester) async {
-    await tester.pumpWidget(const BlockSeasonsApp());
+    SharedPreferences.setMockInitialValues({});
+    final repo = SaveRepository(await SharedPreferences.getInstance());
+
+    await tester.pumpWidget(
+      ProviderScope(
+        overrides: [saveRepositoryProvider.overrideWithValue(repo)],
+        child: const BlockSeasonsApp(),
+      ),
+    );
     await tester.pumpAndSettle();
 
     expect(find.text('Block Seasons'), findsOneWidget);