initial commit with working version

lib/main.dart

@@ -0,0 +1,38 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:isar/isar.dart';
+import 'package:path_provider/path_provider.dart';
+
+import 'src/app.dart';
+import 'src/shared/data/local/collections/user_collection.dart';
+import 'src/shared/data/local/collections/cycle_collection.dart';
+import 'src/shared/data/local/collections/workout_collection.dart';
+
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+
+  // Lock orientation to portrait
+  await SystemChrome.setPreferredOrientations([
+    DeviceOrientation.portraitUp,
+    DeviceOrientation.portraitDown,
+  ]);
+
+  // Initialize Isar database
+  final dir = await getApplicationDocumentsDirectory();
+  final isar = await Isar.open(
+    [UserCollectionSchema, CycleCollectionSchema, WorkoutCollectionSchema],
+    directory: dir.path,
+    name: 'slrpg_db',
+  );
+
+  runApp(
+    ProviderScope(
+      overrides: [isarProvider.overrideWithValue(isar)],
+      child: const SLRPGApp(),
+    ),
+  );
+}
+
+// Global Isar provider
+final isarProvider = Provider<Isar>((ref) => throw UnimplementedError());