首次提交：初始化项目

lib/theme/app_theme.dart

@@ -0,0 +1,59 @@
+import 'package:fluent_ui/fluent_ui.dart';
+import 'package:flutter/foundation.dart';
+import 'package:system_theme/system_theme.dart';
+
+enum NavigationIndicators { sticky, end }
+
+class AppTheme extends ChangeNotifier {
+  AccentColor? _color;
+  AccentColor get color => _color ?? systemAccentColor;
+  set color(AccentColor color) {
+    _color = color;
+    notifyListeners();
+  }
+
+  ThemeMode _mode = ThemeMode.system;
+  ThemeMode get mode => _mode;
+  set mode(ThemeMode mode) {
+    _mode = mode;
+    notifyListeners();
+  }
+
+  PaneDisplayMode _displayMode = PaneDisplayMode.compact;
+  PaneDisplayMode get displayMode => _displayMode;
+  set displayMode(PaneDisplayMode displayMode) {
+    _displayMode = displayMode;
+    notifyListeners();
+  }
+
+  NavigationIndicators _indicator = NavigationIndicators.sticky;
+  NavigationIndicators get indicator => _indicator;
+  set indicator(NavigationIndicators indicator) {
+    _indicator = indicator;
+    notifyListeners();
+  }
+
+  TextDirection _textDirection = TextDirection.ltr;
+  TextDirection get textDirection => _textDirection;
+  set textDirection(TextDirection direction) {
+    _textDirection = direction;
+    notifyListeners();
+  }
+}
+
+AccentColor get systemAccentColor {
+  if ((defaultTargetPlatform == TargetPlatform.windows ||
+          defaultTargetPlatform == TargetPlatform.android) &&
+      !kIsWeb) {
+    return AccentColor.swatch({
+      'darkest': SystemTheme.accentColor.darkest,
+      'darker': SystemTheme.accentColor.darker,
+      'dark': SystemTheme.accentColor.dark,
+      'normal': SystemTheme.accentColor.accent,
+      'light': SystemTheme.accentColor.light,
+      'lighter': SystemTheme.accentColor.lighter,
+      'lightest': SystemTheme.accentColor.lightest,
+    });
+  }
+  return Colors.blue;
+}