feat: 重构报销单服务并完善前端提交与审核交互

重构 expense_claims 服务模块结构并优化差旅票据审核逻辑，
增强用户代理服务的票据类型识别，前端报销创建页面拆分为
附件模型和会话模型模块，重构提交编排器和草稿关联确认流
程，更新知识库索引，补充单元测试。

web/src/views/scripts/travelReimbursementAttachmentModel.js

@@ -37,6 +37,7 @@ function resolveStatusTone(status) {
 export const MAX_ATTACHMENTS = 10
 export const MAX_OCR_DOCUMENTS = 10
 export const VISIBLE_ATTACHMENT_CHIPS = 2
+export const ATTACHMENT_ASSOCIATION_CONFIRM_HREF = '#confirm-attachment-association'
 
 export function normalizeOcrDocuments(payload) {
   const documents = Array.isArray(payload?.documents) ? payload.documents : []
@@ -85,6 +86,88 @@ export function buildOcrSummaryFromDocuments(documents) {
     .join('；')
 }
 
+function resolveAssociationDocumentTypeLabel(document) {
+  const explicitLabel = String(document?.document_type_label || '').trim()
+  if (explicitLabel) {
+    return explicitLabel
+  }
+
+  const sceneLabel = String(document?.scene_label || '').trim()
+  if (sceneLabel) {
+    return sceneLabel
+  }
+
+  const typeLabel = resolveDocumentTypeLabel(document?.document_type)
+  return String(typeLabel || '').trim() || '其他票据'
+}
+
+function buildAssociationDocumentContentLines(document) {
+  const fields = Array.isArray(document?.document_fields) ? document.document_fields : []
+  const fieldLines = fields
+    .map((field) => {
+      const label = String(field?.label || '').trim()
+      const value = String(field?.value || '').trim()
+      return label && value ? `- ${label}：${value}` : ''
+    })
+    .filter(Boolean)
+
+  if (fieldLines.length) {
+    return fieldLines.slice(0, 8)
+  }
+
+  const summary = String(document?.summary || document?.text || '').trim()
+  if (summary) {
+    return [`- 识别内容：${summary}`]
+  }
+
+  return ['- 识别内容：暂未提取到结构化字段，请以票据原件为准。']
+}
+
+export function buildAttachmentAssociationConfirmationMessage({
+  claimNo = '',
+  claimTitle = '',
+  fileNames = [],
+  ocrDocuments = []
+} = {}) {
+  const documents = Array.isArray(ocrDocuments) && ocrDocuments.length
+    ? ocrDocuments
+    : (Array.isArray(fileNames) ? fileNames : [])
+      .map((filename) => ({ filename }))
+      .filter((item) => String(item.filename || '').trim())
+  const targetLines = [
+    claimNo ? `- 草稿单号：${claimNo}` : '',
+    claimTitle ? `- 单据说明：${claimTitle}` : '',
+    `- 本次待归集附件：${documents.length || fileNames.length || 0} 份`
+  ].filter(Boolean)
+
+  const documentBlocks = documents.map((document, index) => {
+    const filename = String(document?.filename || '').trim() || `附件 ${index + 1}`
+    const typeLabel = resolveAssociationDocumentTypeLabel(document)
+    const contentLines = buildAssociationDocumentContentLines(document)
+    return [
+      `附件 ${index + 1}：${filename}`,
+      '',
+      `附件类型：${typeLabel}`,
+      '',
+      ...contentLines
+    ].join('\n')
+  })
+
+  return [
+    '已识别附件信息：',
+    '',
+    documentBlocks.join('\n\n'),
+    '',
+    '请问是否确定将票据信息归集到单据：',
+    '',
+    targetLines.join('\n'),
+    '',
+    `如果 [确认](${ATTACHMENT_ASSOCIATION_CONFIRM_HREF}) 该信息，我将直接将票据进行归集。`
+  ]
+    .filter((part) => String(part || '').trim())
+    .join('\n')
+}
+
 export function normalizeReviewDocumentFieldKey(label) {
   const compact = String(label || '').replace(/\s+/g, '').toLowerCase()
   if (!compact) return ''