add alot

lib/models/settings.dart

@@ -0,0 +1,26 @@
+enum AppThemeMode { system, light, dark }
+
+class AppSettings {
+  final bool pinRequired;
+  final AppThemeMode themeMode;
+
+  const AppSettings({
+    required this.pinRequired,
+    required this.themeMode,
+  });
+
+  AppSettings copyWith({
+    bool? pinRequired,
+    AppThemeMode? themeMode,
+  }) {
+    return AppSettings(
+      pinRequired: pinRequired ?? this.pinRequired,
+      themeMode: themeMode ?? this.themeMode,
+    );
+  }
+
+  static const AppSettings defaults = AppSettings(
+    pinRequired: false,
+    themeMode: AppThemeMode.system,
+  );
+}