Initial commit: Fixes for linting and compilation

test/widget_test.dart

@@ -0,0 +1,11 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:christian_period_tracker/main.dart';
+
+void main() {
+  testWidgets('App loads correctly', (WidgetTester tester) async {
+    // Build our app and trigger a frame.
+    // Note: This is a placeholder test - integration tests require Hive initialization
+    expect(true, isTrue);
+  });
+}