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/views/scripts/travelReimbursementAttachmentModel.js

@@ -39,6 +39,26 @@ export const MAX_OCR_DOCUMENTS = 10
 export const VISIBLE_ATTACHMENT_CHIPS = 2
 export const ATTACHMENT_ASSOCIATION_CONFIRM_HREF = '#confirm-attachment-association'
 
+export function buildUnsavedDraftAttachmentConfirmationMessage({ fileNames = [] } = {}) {
+  const names = (Array.isArray(fileNames) ? fileNames : [])
+    .map((item) => String(item || '').trim())
+    .filter(Boolean)
+  const attachmentLine = names.length
+    ? `本次待归集附件：${names.length} 份（${names.join('、')}）`
+    : '本次待归集附件：待识别'
+
+  return [
+    '当前这笔报销信息还没有保存为草稿。',
+    '',
+    '如果继续上传票据，我需要先把当前已识别的信息保存成一张草稿单据，再识别并归集本次附件。',
+    '',
+    attachmentLine,
+    '',
+    '',
+    `如果 **[确定](${ATTACHMENT_ASSOCIATION_CONFIRM_HREF})**，我会先保存这笔未保存单据，再把此次上传的附件归集到该单据。`
+  ].join('\n').trim()
+}
+
 export function normalizeOcrDocuments(payload) {
   const documents = Array.isArray(payload?.documents) ? payload.documents : []
   return documents.slice(0, MAX_OCR_DOCUMENTS).map((item) => ({
@@ -333,6 +353,10 @@ export function resolveDocumentPreview(filePreviews, filename) {
   )
 }
 
+export function isTemporaryPreviewUrl(url) {
+  return String(url || '').trim().toLowerCase().startsWith('blob:')
+}
+
 export function buildFileIdentity(file) {
   return [file?.name, file?.size, file?.lastModified, file?.type].join('__')
 }
@@ -374,18 +398,39 @@ export function mergeFilesWithLimit(existingFiles, incomingFiles, limit = MAX_AT
 
 export function mergeFilePreviews(existingPreviews, incomingPreviews) {
   const result = []
-  const seen = new Set()
+  const indexByKey = new Map()
 
   for (const preview of [...(existingPreviews || []), ...(incomingPreviews || [])]) {
     const key = [preview?.filename, preview?.kind].join('__')
-    if (!preview?.filename || seen.has(key)) continue
-    seen.add(key)
-    result.push(preview)
+    if (!preview?.filename) continue
+
+    const existingIndex = indexByKey.get(key)
+    if (existingIndex === undefined) {
+      indexByKey.set(key, result.length)
+      result.push(preview)
+      continue
+    }
+
+    const existingPreview = result[existingIndex]
+    const nextUrl = String(preview?.url || '').trim()
+    const existingUrl = String(existingPreview?.url || '').trim()
+    if (nextUrl && (!existingUrl || isTemporaryPreviewUrl(existingUrl) || nextUrl !== existingUrl)) {
+      result[existingIndex] = preview
+    }
   }
 
   return result
 }
 
+export function filterPersistableFilePreviews(filePreviews) {
+  return (Array.isArray(filePreviews) ? filePreviews : [])
+    .filter((preview) => {
+      const filename = String(preview?.filename || '').trim()
+      const url = String(preview?.url || '').trim()
+      return filename && !isTemporaryPreviewUrl(url)
+    })
+}
+
 function inferPreviewKindFromUrl(url) {
   const normalized = String(url || '').trim().toLowerCase()
   if (!normalized) return ''