feat(web): AI 工作台文件预览/附件关联任务与草稿分支

- 新增 WorkbenchAiFilePreviewDialog 附件预览对话框及 useWorkbenchAiFilePreview，附件支持点击预览
- 新增 attachmentAssociationJobs/linkedReimbursementDraftJobs 前端服务与对应 composable，接入后台任务轮询与状态展示
- 新增 travelReimbursementDraftBranchModel 草稿分支模型，报销关联门控支持跳过/选择草稿
- PersonalWorkbenchAiMode 及各 composable（expense/document/steward/application-preview/attachment-association）重构适配，WorkbenchAiComposer/FileStrip 样式与交互完善
- DocumentsCenter/ReceiptFolder/TravelReimbursementCreate 等视图及 scripts 重构，风险/差旅规划/审批等工具适配
- 新增/更新前端测试：application-result-card、reimbursement-list-preview-fetch、guided-flow、composer-components 等

web/tests/workbench-ai-action-router.test.mjs

@@ -4,6 +4,10 @@ import test from 'node:test'
 import { buildInlineApplicationPreview } from '../src/composables/workbenchAiMode/workbenchAiApplicationPreviewModel.js'
 import { buildStewardSuggestedActions } from '../src/views/scripts/stewardPlanModel.js'
 import { useWorkbenchAiActionRouter } from '../src/composables/workbenchAiMode/useWorkbenchAiActionRouter.js'
+import {
+  CONTINUE_REIMBURSEMENT_DRAFT_ACTION,
+  CREATE_STANDALONE_REIMBURSEMENT_DRAFT_ACTION
+} from '../src/views/scripts/travelReimbursementAssociationGateModel.js'
 
 test('workbench steward application confirmation opens inline application preview directly', () => {
   const [action] = buildStewardSuggestedActions({
@@ -136,3 +140,108 @@ test('workbench reimbursement skip link action opens new reimbursement flow', ()
     label: '不关联，单独新建报销单'
   })
 })
+
+test('workbench draft continuation action asks for attachments or description', () => {
+  let continuationPayload = null
+  let fallbackConversationStarted = false
+  const router = useWorkbenchAiActionRouter({
+    aiExpenseDraft: { value: null },
+    applicationFlow: {
+      isInlineSuggestedActionDisabled: () => false,
+      executeInlineApplicationPreviewAction: () => {}
+    },
+    assistantDraft: { value: '' },
+    attachmentFlow: {
+      confirmAiAttachmentAssociation: () => {}
+    },
+    emit: () => {},
+    expenseFlow: {
+      linkAiExpenseApplication: () => {},
+      promptAiReimbursementDraftContinuation: (payload) => {
+        continuationPayload = payload
+      },
+      promptStandaloneReimbursementDraftCreation: () => {},
+      pushInlineExpenseSceneSelectionPrompt: () => {},
+      startAiApplicationPreviewFromAction: () => {},
+      startAiExpenseDraft: () => {},
+      startAiReimbursementAssociationGate: () => {}
+    },
+    focusAiModeInput: () => {},
+    hasInlineAttachmentOcrDetails: () => false,
+    resolveLatestInlineUserPrompt: () => '',
+    selectedFiles: { value: [] },
+    startInlineConversation: () => {
+      fallbackConversationStarted = true
+    },
+    toast: () => {},
+    toggleInlineAttachmentOcrDetails: () => {}
+  })
+
+  router.handleInlineSuggestedAction({
+    label: '继续关联草稿 RE-202606-010',
+    action_type: CONTINUE_REIMBURSEMENT_DRAFT_ACTION,
+    payload: {
+      claim_id: 'draft-travel-1',
+      claim_no: 'RE-202606-010',
+      original_message: '我要报销'
+    }
+  })
+
+  assert.equal(fallbackConversationStarted, false)
+  assert.deepEqual(continuationPayload, {
+    claim_id: 'draft-travel-1',
+    claim_no: 'RE-202606-010',
+    original_message: '我要报销'
+  })
+})
+
+test('workbench standalone draft action asks before creating a new reimbursement draft', () => {
+  let standalonePrompt = null
+  let fallbackConversationStarted = false
+  const router = useWorkbenchAiActionRouter({
+    aiExpenseDraft: { value: null },
+    applicationFlow: {
+      isInlineSuggestedActionDisabled: () => false,
+      executeInlineApplicationPreviewAction: () => {}
+    },
+    assistantDraft: { value: '' },
+    attachmentFlow: {
+      confirmAiAttachmentAssociation: () => {}
+    },
+    emit: () => {},
+    expenseFlow: {
+      linkAiExpenseApplication: () => {},
+      promptAiReimbursementDraftContinuation: () => {},
+      promptStandaloneReimbursementDraftCreation: (sourceText, label) => {
+        standalonePrompt = { sourceText, label }
+      },
+      pushInlineExpenseSceneSelectionPrompt: () => {},
+      startAiApplicationPreviewFromAction: () => {},
+      startAiExpenseDraft: () => {},
+      startAiReimbursementAssociationGate: () => {}
+    },
+    focusAiModeInput: () => {},
+    hasInlineAttachmentOcrDetails: () => false,
+    resolveLatestInlineUserPrompt: () => '',
+    selectedFiles: { value: [] },
+    startInlineConversation: () => {
+      fallbackConversationStarted = true
+    },
+    toast: () => {},
+    toggleInlineAttachmentOcrDetails: () => {}
+  })
+
+  router.handleInlineSuggestedAction({
+    label: '独立新建报销单',
+    action_type: CREATE_STANDALONE_REIMBURSEMENT_DRAFT_ACTION,
+    payload: {
+      original_message: '我要报销'
+    }
+  })
+
+  assert.equal(fallbackConversationStarted, false)
+  assert.deepEqual(standalonePrompt, {
+    sourceText: '我要报销',
+    label: '独立新建报销单'
+  })
+})