English: Accept .html and .htm knowledge uploads across frontend, Go, and DocReader. Parse static HTML with charset-aware decoding, preserve document structure and local links, and keep scripts/network execution disabled. Add regression coverage for validation, engine registration, encoding, and parser behavior.
中文：打通知识库本地 .html 与 .htm 文件从前端、Go 服务到 DocReader 的完整上传链路。使用可识别字符编码的静态解析，保留文档结构和本地链接，不执行脚本或发起网络请求，并补充文件校验、引擎注册、编码及解析行为的回归测试。
xiaowang
f3cd3d9724