初始化

lib/config/theme/base/app_theme_ext.dart

@@ -0,0 +1,45 @@
+import 'package:flutter/material.dart';
+
+import 'app_colors_base.dart';
+
+@immutable
+class AppThemeExtension extends ThemeExtension<AppThemeExtension> {
+  final AppColorsBase baseTheme;
+
+  const AppThemeExtension({required this.baseTheme});
+
+  @override
+  ThemeExtension<AppThemeExtension> copyWith({
+    AppColorsBase? baseTheme,
+  }) {
+    return AppThemeExtension(
+      baseTheme: baseTheme ?? this.baseTheme,
+    );
+  }
+
+  @override
+  AppThemeExtension lerp(AppThemeExtension? other, double t) {
+    if (other is! AppThemeExtension) return this;
+    return t < 0.5 ? this : other; // 或者 this/base 混合逻辑
+  }
+}
+
+extension AppThemeExt on BuildContext {
+  AppThemeExtension get themeEx => Theme.of(this).extension<AppThemeExtension>()!;
+
+  ///主题
+  Color get success => themeEx.baseTheme.success;
+
+  Color get warning => themeEx.baseTheme.warning;
+
+  Color get danger => themeEx.baseTheme.danger;
+
+  Color get info => themeEx.baseTheme.info;
+
+  //字体灰度
+  Color get textSecondary => themeEx.baseTheme.textSecondary;
+
+  Color get textTertiary => themeEx.baseTheme.textTertiary;
+
+  double get pagePadding => 12;
+}