当 hostname 配置通过 setting.json 或 Web UI 进行更新时,会跳过 http:// 前缀的自动补全

Bug description

In Config.__post_init__ (lines 287-289 in config.py), there is a logic to automatically append the http:// prefix to the hostname, but when the configuration is saved through setting.json or the Web UI, the path Config.update_config() → setattr() → self.init() is followed, completely skipping the hostname validation in __post_init__.