feat(theme): 接入 Obsidian Flare 设计系统

test/theme/glass_panel_test.dart

@@ -0,0 +1,43 @@
+// Author: fruit.com.cn
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:fruitshorts/core/theme/app_colors.dart';
+import 'package:fruitshorts/core/widgets/glass_panel.dart';
+
+void main() {
+  testWidgets('should_blur_and_paint_a_bordered_glass_surface', (tester) async {
+    await tester.pumpWidget(
+      const MaterialApp(
+        home: Scaffold(
+          body: Center(
+            child: GlassPanel(
+              radius: 26,
+              padding: EdgeInsets.all(16),
+              child: Text('glass'),
+            ),
+          ),
+        ),
+      ),
+    );
+
+    final filter = tester.widget<BackdropFilter>(find.byType(BackdropFilter));
+    expect(filter.filter, isNotNull);
+    expect(find.text('glass'), findsOneWidget);
+
+    final clip = tester.widget<ClipRRect>(find.byType(ClipRRect).first);
+    expect(clip.borderRadius, BorderRadius.circular(26));
+
+    final decorated = tester.widget<DecoratedBox>(
+      find
+          .descendant(
+            of: find.byType(GlassPanel),
+            matching: find.byType(DecoratedBox),
+          )
+          .first,
+    );
+    final decoration = decorated.decoration as BoxDecoration;
+    expect(decoration.gradient, isA<LinearGradient>());
+    expect(decoration.border!.top.color, AppColors.glassBorder);
+  });
+}