feat: 万花筒专区可设置门的通关状态

通关态与前两个动作一样落在 userKaleidxScopeList 同一行，是 isClear。
用三态下拉（不改动 / 已通关 / 未通关）而不是勾选框，因为通关可以往回改。

- 标记通关时补 clearDate，格式按客户端 TimeManager.GetDateString 的
  yyyy-MM-dd HH:mm:ss.f；已有首次通关日期不覆盖，撤销通关时一起清空
- 上行是整行替换，只叠加要改的位，playCount / best 成绩 / 日期保持原值
- 通关态只在 found && key 的前提下才显示得出来，缺钥匙时给一条短提示
- 校验放宽：三个动作任选其一即可执行

test/kaleidx_scope_page_test.dart

@@ -40,7 +40,7 @@ Finder _runFinder(WidgetTester tester) => find.ancestor(
 );
 
 void main() {
-  testWidgets('渲染门 ID 输入与两个动作勾选，且无溢出', (tester) async {
+  testWidgets('渲染门 ID 输入、两个勾选与通关下拉，且无溢出', (tester) async {
     await _pumpPage(tester, loggedIn: true);
 
     expect(tester.takeException(), isNull);
@@ -71,7 +71,7 @@ void main() {
     expect(find.text(AppStrings.kaleidxPendingEmpty), findsNothing);
   });
 
-  testWidgets('两个动作都不勾时被拦下', (tester) async {
+  testWidgets('三个动作都不选时被拦下', (tester) async {
     await _pumpPage(tester, loggedIn: true);
 
     await tester.enterText(find.byType(TextField), '3');
@@ -86,6 +86,37 @@ void main() {
     expect(find.text(AppStrings.kaleidxNeedAction), findsOneWidget);
   });
 
+  testWidgets('通关状态下拉默认「不改动」，选已通关才提示需要钥匙', (tester) async {
+    await _pumpPage(tester, loggedIn: true);
+
+    expect(find.text(AppStrings.kaleidxClearKeep), findsOneWidget);
+    expect(find.text(AppStrings.kaleidxClearNeedsKey), findsNothing);
+
+    await tester.tap(find.text(AppStrings.kaleidxClearKeep));
+    await tester.pumpAndSettle();
+    await tester.tap(find.text(AppStrings.kaleidxClearCleared).last);
+    await tester.pumpAndSettle();
+
+    expect(find.text(AppStrings.kaleidxClearCleared), findsOneWidget);
+    expect(find.text(AppStrings.kaleidxClearNeedsKey), findsOneWidget);
+    expect(tester.takeException(), isNull);
+  });
+
+  testWidgets('勾了钥匙时优先解释「钥匙离不开门」', (tester) async {
+    await _pumpPage(tester, loggedIn: true);
+
+    await tester.tap(find.text(AppStrings.kaleidxActionKey));
+    await tester.pump();
+    await tester.tap(find.text(AppStrings.kaleidxClearKeep));
+    await tester.pumpAndSettle();
+    await tester.tap(find.text(AppStrings.kaleidxClearCleared).last);
+    await tester.pumpAndSettle();
+
+    expect(find.text(AppStrings.kaleidxKeyNeedsGate), findsOneWidget);
+    // 两条提示不叠着刷屏。
+    expect(find.text(AppStrings.kaleidxClearNeedsKey), findsNothing);
+  });
+
   testWidgets('列表为空时执行被拦下', (tester) async {
     await _pumpPage(tester, loggedIn: true);