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/tests/attachment-association-confirmation.test.mjs

@@ -7,7 +7,10 @@ import {
   ATTACHMENT_ASSOCIATION_CONFIRM_HREF,
   buildAttachmentAssociationConfirmationMessage,
   buildOcrFilePreviews,
-  buildReviewFilePreviewsFromReviewPayload
+  buildReviewFilePreviewsFromReviewPayload,
+  buildUnsavedDraftAttachmentConfirmationMessage,
+  filterPersistableFilePreviews,
+  mergeFilePreviews
 } from '../src/views/scripts/travelReimbursementAttachmentModel.js'
 import {
   buildDraftAssociationQueryPayload,
@@ -99,6 +102,14 @@ test('attachment upload association uses conversation selection instead of legac
     fileURLToPath(new URL('../src/views/scripts/useTravelReimbursementSubmitComposer.js', import.meta.url)),
     'utf8'
   )
+  const flowSource = readFileSync(
+    fileURLToPath(new URL('../src/views/scripts/useTravelReimbursementFlow.js', import.meta.url)),
+    'utf8'
+  )
+  const conversationSource = readFileSync(
+    fileURLToPath(new URL('../src/views/scripts/travelReimbursementConversationModel.js', import.meta.url)),
+    'utf8'
+  )
 
   assert.doesNotMatch(viewSource, /检测到你已有单据事件|uploadDecisionDialogOpen|continueExistingUpload|createNewUploadDocument/)
   assert.doesNotMatch(submitComposerSource, /uploadDecisionDialogOpen|hasExistingDocumentEvent|skipUploadDecisionPrompt/)
@@ -112,6 +123,26 @@ test('attachment upload association uses conversation selection instead of legac
     submitComposerSource,
     /files\.length[\s\S]*!resolvedUploadDisposition[\s\S]*!options\.skipDraftAssociationPrompt[\s\S]*!reviewAction/
   )
+  assert.match(submitComposerSource, /mode:\s*'save_then_associate'/)
+  assert.match(submitComposerSource, /review_action:\s*'save_draft'[\s\S]*review_action:\s*'link_to_existing_draft'/)
+  assert.match(submitComposerSource, /appendToCurrentFlow:\s*true/)
+  assert.match(submitComposerSource, /const appendToCurrentFlow = Boolean\(options\.appendToCurrentFlow\)/)
+  assert.match(submitComposerSource, /if \(!appendToCurrentFlow\) \{\s*resetFlowRun\(\)\s*\} else \{\s*clearFlowSimulationTimers\(\)/)
+  assert.match(flowSource, /link_to_existing_draft:\s*\{[\s\S]*key:\s*'attachment-association'/)
+  assert.match(flowSource, /responseMessage\.includes\('关联'\)[\s\S]*key:\s*'attachment-association'/)
+  assert.match(conversationSource, /'attachment-association':\s*\{[\s\S]*title:\s*'票据关联草稿'/)
+})
+
+test('unsaved review attachment prompt asks for explicit rich-text confirmation', () => {
+  const message = buildUnsavedDraftAttachmentConfirmationMessage({
+    fileNames: ['taxi.pdf']
+  })
+  const rendered = renderMarkdown(message)
+
+  assert.match(message, /当前这笔报销信息还没有保存为草稿/)
+  assert.match(message, /本次待归集附件：1 份/)
+  assert.match(message, new RegExp(`\\*\\*\\[确定\\]\\(${ATTACHMENT_ASSOCIATION_CONFIRM_HREF}\\)\\*\\*`))
+  assert.match(rendered, /<strong><a href="#confirm-attachment-association" class="markdown-action-link markdown-action-link-confirm">确定<\/a><\/strong>/)
 })
 
 test('OCR preview builders keep hotel receipt image previews when preview kind is omitted', () => {
@@ -137,6 +168,26 @@ test('OCR preview builders keep hotel receipt image previews when preview kind i
   assert.deepEqual(reviewPreviews, [{ filename: 'hotel.png', kind: 'image', url: dataUrl }])
 })
 
+test('file preview cache replaces temporary object urls and never persists them', () => {
+  const merged = mergeFilePreviews(
+    [
+      { filename: 'invoice.pdf', kind: 'pdf', url: 'blob:http://localhost/old-preview' },
+      { filename: 'hotel.png', kind: 'image', url: 'data:image/png;base64,stable' }
+    ],
+    [
+      { filename: 'invoice.pdf', kind: 'pdf', url: 'blob:http://localhost/new-preview' },
+      { filename: 'hotel.png', kind: 'image' }
+    ]
+  )
+
+  assert.equal(merged.length, 2)
+  assert.equal(merged[0].url, 'blob:http://localhost/new-preview')
+  assert.equal(merged[1].url, 'data:image/png;base64,stable')
+  assert.deepEqual(filterPersistableFilePreviews(merged), [
+    { filename: 'hotel.png', kind: 'image', url: 'data:image/png;base64,stable' }
+  ])
+})
+
 test('draft association query keeps a single candidate selectable in the conversation', () => {
   const payload = buildDraftAssociationQueryPayload([
     {
@@ -182,6 +233,30 @@ test('expense query payload keeps structured risk items for claim-level risk dri
   assert.equal(payload.records[0].riskItems[0].summary, '住宿金额超过城市标准')
 })
 
+test('expense query info items render as prompts instead of low risk', () => {
+  const payload = normalizeExpenseQueryPayload({
+    result_type: 'expense_claim_list',
+    records: [
+      {
+        claim_id: 'claim-info',
+        claim_no: 'EXP-202605-010',
+        amount: 59.1,
+        risk_flags: [
+          {
+            key: 'normal-tip',
+            level: 'info',
+            title: '票据提示',
+            summary: '票据已识别，当前没有异常。'
+          }
+        ]
+      }
+    ]
+  })
+
+  assert.equal(payload.records[0].riskItems[0].levelLabel, '提示')
+  assert.notEqual(payload.records[0].riskItems[0].levelLabel, '低风险')
+})
+
 test('expense query hint guides users to the reimbursement center after the top five results', () => {
   const payload = normalizeExpenseQueryPayload({
     result_type: 'expense_claim_list',