fix(测试数据生成器): 修复规则覆盖保存误创建重复规则

覆盖同名规则时 handleSave(true) 未传入已有规则 id，save() 走新建分支
导致旧规则保留且产生同名重复项，getByName 仍返回旧数据。

src/utils/__tests__/ruleStorage.test.ts

@@ -48,6 +48,27 @@ describe('ruleStorage', () => {
     expect(updated).toBeNull();
   });
 
+  it('save 带 id 时应更新已有规则而非新建', () => {
+    const first = ruleStorage.save({
+      name: 'Test Rule',
+      fields: [mockField],
+    });
+    expect(first).not.toBeNull();
+
+    const updatedField = { ...mockField, name: 'email' };
+    const updated = ruleStorage.save({
+      id: first!.id,
+      name: 'Test Rule',
+      description: 'Updated',
+      fields: [updatedField],
+    });
+
+    expect(updated).not.toBeNull();
+    expect(ruleStorage.getCount()).toBe(1);
+    expect(ruleStorage.getById(first!.id)?.fields[0].name).toBe('email');
+    expect(ruleStorage.getById(first!.id)?.description).toBe('Updated');
+  });
+
   it('deleteRule 在 localStorage 写入失败时应返回 false', () => {
     const saved = ruleStorage.save({
       name: 'Test Rule',