feat(flutter): 增加关键操作震动反馈

test/support/fake_haptics.dart

@@ -0,0 +1,36 @@
+// Author: fruit.com.cn
+
+import 'package:fruitshorts/core/platform/haptics.dart';
+
+/// Deterministic haptics recorder for widget tests.
+class FakeHaptics implements Haptics {
+  final List<String> calls = [];
+  int selectionClicks = 0;
+  int lightImpacts = 0;
+  int mediumImpacts = 0;
+
+  void reset() {
+    calls.clear();
+    selectionClicks = 0;
+    lightImpacts = 0;
+    mediumImpacts = 0;
+  }
+
+  @override
+  Future<void> selectionClick() async {
+    calls.add('selection');
+    selectionClicks++;
+  }
+
+  @override
+  Future<void> lightImpact() async {
+    calls.add('light');
+    lightImpacts++;
+  }
+
+  @override
+  Future<void> mediumImpact() async {
+    calls.add('medium');
+    mediumImpacts++;
+  }
+}