feat: study home with daily plan card and quick actions

test/widget_test.dart

@@ -41,4 +41,20 @@ void main() {
     bar = tester.widget<NavigationBar>(find.byType(NavigationBar));
     expect(bar.selectedIndex, 3);
   });
+
+  testWidgets('学习首页展示今日任务与唯一主行动', (WidgetTester tester) async {
+    await tester.pumpWidget(const KiriMemoApp());
+
+    expect(find.text('今日计划'), findsOneWidget);
+    expect(find.text('待复习'), findsOneWidget);
+    expect(find.text('待新识'), findsOneWidget);
+    expect(find.text('开始学习'), findsOneWidget);
+
+    // 未接入内核的入口点击后要有反馈，不能静默无响应。
+    await tester.tap(find.text('开始学习'));
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 300));
+
+    expect(find.text('学习会话 尚未接入内核'), findsOneWidget);
+  });
 }