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>

model/database.py

@@ -71,4 +71,4 @@ class Database:
 
         # For internal use, create a temporary context manager
         async with self.session_context() as session:
-            await migration(session)  # 执行迁移脚本
+            await migration(session)  # 执行迁移脚本