feat(reward): 新增客户端奖励中心

test/core/app_press_scale_test.dart

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+// Author: fruit.com.cn
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:fruitshorts/core/widgets/app_press_scale.dart';
+
+void main() {
+  testWidgets('should_scale_down_on_pointer_down_and_settle_on_release', (
+    tester,
+  ) async {
+    await tester.pumpWidget(
+      const MaterialApp(
+        home: Scaffold(
+          body: Center(
+            child: AppPressScale(
+              key: Key('press-scale'),
+              child: SizedBox.square(key: Key('press-target'), dimension: 80),
+            ),
+          ),
+        ),
+      ),
+    );
+
+    final transformFinder = find.descendant(
+      of: find.byKey(const Key('press-scale')),
+      matching: find.byType(Transform),
+    );
+    expect(tester.widget<Transform>(transformFinder).transform.entry(0, 0), 1);
+
+    final gesture = await tester.startGesture(
+      tester.getCenter(find.byKey(const Key('press-target'))),
+    );
+    await tester.pump(const Duration(milliseconds: 90));
+    expect(
+      tester.widget<Transform>(transformFinder).transform.entry(0, 0),
+      lessThan(1),
+    );
+
+    await gesture.up();
+    await tester.pumpAndSettle();
+    expect(tester.widget<Transform>(transformFinder).transform.entry(0, 0), 1);
+  });
+}