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/src/composables/workbenchAiMode/useWorkbenchAiApplicationPreviewFlow.js

@@ -191,7 +191,7 @@ export function useWorkbenchAiApplicationPreviewFlow({
     if (normalized.validationIssues?.length || normalized.missingFields?.length) {
       return buildApplicationPreviewFooterMessage(normalized)
     }
-    return '申请核对表已补齐，费用测算已同步。你仍可点击表格继续修改；确认无误后，可以点击下方按钮保存草稿或直接提交，也可以直接回复“保存草稿”或“提交”。'
+    return '申请核对表已补齐，费用测算已同步。您仍可点击表格继续修改；确认无误后，可以点击下方按钮保存草稿或直接提交，也可以直接回复“保存草稿”或“提交”。'
   }
 
   function buildInlineApplicationActionFailureText(error, isSubmit) {
@@ -400,7 +400,7 @@ export function useWorkbenchAiApplicationPreviewFlow({
             streamStatus: 'completed',
             thinkingEvents: completeInlineThinkingEvents(resolveInlineThinkingEvents(pendingMessage))
           },
-          suggestedActions: isSubmit ? buildInlineApplicationDetailAction(draftPayload) : []
+          suggestedActions: buildInlineApplicationDetailAction(draftPayload)
         })
       )
       persistCurrentConversation()