feat: 增强知识库索引与设置页面模块化拆分

扩展知识库索引任务和 RAG 检索支持增量入库和文档去重，优
化本体检测和规则匹配精度，前端设置页面拆分为 LLM、邮件
和 Hermes 员工同步子面板并重构样式，新增日志详情组件和
知识入库日志模型，补充单元测试覆盖。

web/src/utils/markdown.js

@@ -12,8 +12,32 @@ const defaultParagraphOpen = markdown.renderer.rules.paragraph_open
 const defaultLinkOpen = markdown.renderer.rules.link_open
 const defaultBlockquoteOpen = markdown.renderer.rules.blockquote_open
 
+const RISK_TEXT_CLASS_BY_LABEL = {
+  低风险: 'markdown-risk-text-low',
+  中风险: 'markdown-risk-text-medium',
+  高风险: 'markdown-risk-text-high'
+}
+
 const ACTION_LINK_CLASS_BY_HREF = {
-  '#confirm-attachment-association': 'markdown-action-link-confirm'
+  '#confirm-attachment-association': 'markdown-action-link-confirm',
+  '#review-next-step': 'markdown-action-link-next',
+  '#review-quick-edit': 'markdown-action-link-edit',
+  '#review-risk-panel': 'markdown-action-link-risk'
+}
+
+function escapeHtml(text) {
+  return String(text || '')
+    .replace(/&/g, '&')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;')
+    .replace(/"/g, '&quot;')
+}
+
+function renderRiskText(text) {
+  return escapeHtml(text).replace(/低风险|中风险|高风险/g, (label) => {
+    const className = RISK_TEXT_CLASS_BY_LABEL[label]
+    return className ? `<span class="${className}">${label}</span>` : label
+  })
 }
 
 function resolveActionLinkClass(href) {
@@ -70,6 +94,8 @@ markdown.renderer.rules.link_open = (tokens, idx, options, env, self) => {
     : self.renderToken(tokens, idx, options)
 }
 
+markdown.renderer.rules.text = (tokens, idx) => renderRiskText(tokens[idx]?.content)
+
 markdown.renderer.rules.blockquote_open = (tokens, idx, options, env, self) => {
   if (blockquoteHasAttachmentHeading(tokens, idx)) {
     tokens[idx].attrJoin('class', 'markdown-attachment-card')