fix:jion未注册加入问题

.idea/misc.xml

@@ -1,4 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="Black">
+    <option name="sdkName" value="Python 3.12 (pythonProject)" />
+  </component>
   <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.12 (pythonProject)" project-jdk-type="Python SDK" />
 </project>

games/sanguosha.py

@@ -36,7 +36,7 @@ class SanguoshaGame(BaseGame):
             
             # 获取用户信息
             user = self.db.get_or_create_user(user_id)
-            username = user.get('username', f'用户{user_id}')
+            username = user.get('username') or f'用户{user_id}'
             
             # 路由指令
             if not args or args == 'help':