feat: 添加记忆功能 - 日记查看器和日历组件

- 后端 API: 获取日记日期列表和详情
- 前端组件：记忆弹窗、日历组件
- 点击记忆按钮查看龙虾工作日记
- 日历高亮显示有日记的日期

code/backend/api/urls.py

@@ -8,5 +8,7 @@ urlpatterns = [
     path('lobsters/', views.lobster_list, name='lobster-list'),
     path('lobsters/<int:lobster_id>/', views.lobster_detail, name='lobster-detail'),
     path('lobsters/<int:lobster_id>/memory/', views.lobster_memory, name='lobster-memory'),
+    path('lobsters/<int:lobster_id>/memory/dates/', views.lobster_memory_dates, name='lobster-memory-dates'),
+    path('lobsters/<int:lobster_id>/memory/<str:date>/', views.lobster_memory_detail, name='lobster-memory-detail'),
     path('tools/', views.tools_list, name='tools-list'),
 ]