feat: 添加日记系统

- 完整的 Django 后端 (diary app)
- 前端页面
- 部署脚本 (本地 + 云端)
- Nginx 配置
- 数据迁移工具
- 同步工具

diary-system/backend/diary/urls.py

@@ -0,0 +1,12 @@
+from django.urls import path, include
+from rest_framework.routers import DefaultRouter
+from .views import DiaryEntryViewSet, DailyProgressViewSet, ExperienceViewSet
+
+router = DefaultRouter()
+router.register(r'entries', DiaryEntryViewSet)
+router.register(r'progress', DailyProgressViewSet)
+router.register(r'experiences', ExperienceViewSet)
+
+urlpatterns = [
+    path('', include(router.urls)),
+]