feat: initial commit - Habo habit tracking app

- Complete MVP with Repository Pattern, SQLite storage
- Provider + ChangeNotifier state management
- Navigation 2.0 with deep link support
- Habit CRUD with twoDayRule, notifications, categories
- Backup/Restore via JSON
- Statistics with streak tracking
- Material You theme support
- Biometric lock support
- Desktop widget support
- 27 languages i18n structure
- Comprehensive test suite (87/89 passing)

lib/widgets/text_container.dart

@@ -0,0 +1,29 @@
+import 'package:flutter/material.dart';
+
+class TextContainer extends StatelessWidget {
+  final String label;
+  final TextEditingController? controller;
+  final String? hint;
+
+  const TextContainer({
+    super.key,
+    required this.label,
+    this.controller,
+    this.hint,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.symmetric(vertical: 4),
+      child: TextField(
+        controller: controller,
+        decoration: InputDecoration(
+          labelText: label,
+          hintText: hint,
+          border: const OutlineInputBorder(),
+        ),
+      ),
+    );
+  }
+}