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/manage.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python
+"""Django's command-line utility for administrative tasks."""
+import os
+import sys
+
+def main():
+    """Run administrative tasks."""
+    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'diary_system.settings')
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError as exc:
+        raise ImportError(
+            "Couldn't import Django. Are you sure it's installed and "
+            "available on your PYTHONPATH environment variable? Did you "
+            "forget to activate a virtual environment?"
+        ) from exc
+    execute_from_command_line(sys.argv)
+
+if __name__ == '__main__':
+    main()