fix: Token timezone display + Skill install/uninstall bugs

backend/python/app/api/market.py

@@ -387,9 +387,6 @@ def uninstall_app(
             app.install_count = app.install_count - 1
 
     # 将应用状态标记为未安装(对于skill类型)
-    if app.type == "skill" and app.is_active:
-        app.is_active = False
-
     app.updated_at = datetime.now()
 
     db.commit()