✨ feat: 智能会话主题追踪+词典分词器+话题切换检测 - #217
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新增本地实时主题追踪系统(TopicGraph)和可插拔词典分词器: ### 分词器(Segmenter) - Segmenter 接口, 支持多语言扩展 - 中文词典分词(正向最大匹配, jieba 词典), 首次使用自动下载 - POS 词性标注过滤虚词(连词/介词/助词/代词等不纳入关键词) - 单字二元组合并(补偿词典未收录的复合词) - FMM 算法修复: 长词优先(修复前高频短词会错误替换长词) - 安全加固: HTTP 30s 超时, 32MB 响应体限制, 缓存目录 0700 ### 主题追踪(TopicGraph) - TF-IDF + 余弦相似度实时追踪对话主题 - 会话侧重点摘要(SessionFocus) - 话题切换检测: 与会话主导话题比对, 区分"切换"与"扩展" - 虚词过滤基于 jieba POS 标注(删除硬编码词表) - 会话隔离: /new 切换时 TopicGraph 自动重建 ### 配置 - segmenter.yaml 独立配置文件(不污染 model.yaml) - language: zh 启用中文词典分词(默认不启用,零开销) ### 交互增强 - 话题切换时提示创建新会话 - 状态栏显示会话侧重点 - F2 鼠标穿透模式切换 - 右键输入区粘贴 Fixes itmisx#211
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新增本地实时主题追踪系统(TopicGraph)和可插拔词典分词器:
分词器(Segmenter)
主题追踪(TopicGraph)
配置