Refactor models and routes for item management

Reorganized model structure by replacing 'object' and 'items' with a unified 'item' model using UUIDs, and moved base model logic into separate files. Updated routes to use the new item model and improved request/response handling. Enhanced user and setting models, added utility functions, and improved error handling throughout the codebase. Also added initial .idea project files and minor admin API improvements.

Co-Authored-By: 砂糖橘 <54745033+Foxerine@users.noreply.github.com>

main.py

@@ -32,4 +32,4 @@ if __name__ == '__main__':
         port=port,
         log_config=None,  # 禁用 uvicorn 默认的日志配置，使用 loguru
         reload=debug,  # 调试模式下启用热重载
-    )
+    )