feat(mine): 重做我的页会员卡与功能宫格布局

test/support/widget_capture.dart

@@ -0,0 +1,60 @@
+// Author: fruit.com.cn
+// 为界面视觉复核加载项目字体并导出测试渲染图。
+
+import 'dart:io';
+import 'dart:ui' as ui;
+
+import 'package:flutter/rendering.dart';
+import 'package:flutter/services.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+const double _capturePixelRatio = 3;
+
+/// 为可选截图使用实际字体，不影响普通测试执行。
+Future<void> loadCaptureFonts(WidgetTester tester) async {
+  await tester.runAsync(() async {
+    final fonts = {
+      'Outfit': [
+        'Outfit-Regular.ttf',
+        'Outfit-SemiBold.ttf',
+        'Outfit-Bold.ttf',
+      ],
+      'PlusJakartaSans': [
+        'PlusJakartaSans-Regular.ttf',
+        'PlusJakartaSans-Medium.ttf',
+        'PlusJakartaSans-SemiBold.ttf',
+        'PlusJakartaSans-Bold.ttf',
+      ],
+      // 测试默认字体仅作占位，截图使用项目正文字体替换。
+      'Ahem': ['PlusJakartaSans-Regular.ttf'],
+    };
+    for (final family in fonts.entries) {
+      final loader = FontLoader(family.key);
+      for (final asset in family.value) {
+        loader.addFont(rootBundle.load('assets/fonts/$asset'));
+      }
+      await loader.load();
+    }
+    final icons = FontLoader('MaterialIcons');
+    icons.addFont(rootBundle.load('fonts/MaterialIcons-Regular.otf'));
+    await icons.load();
+  });
+}
+
+/// 导出指定边界的渲染结果，图片为测试产物而非界面资源。
+Future<void> saveWidgetCapture(
+  WidgetTester tester,
+  Key boundaryKey,
+  String path,
+) async {
+  final boundary = tester.renderObject<RenderRepaintBoundary>(
+    find.byKey(boundaryKey),
+  );
+  await tester.runAsync(() async {
+    final image = await boundary.toImage(pixelRatio: _capturePixelRatio);
+    final bytes = await image.toByteData(format: ui.ImageByteFormat.png);
+    if (bytes == null) throw StateError('Screenshot encoding failed');
+    await File(path).writeAsBytes(bytes.buffer.asUint8List());
+    image.dispose();
+  });
+}