feat(web): 票据夹资产缓存接入与 AI 工作台附件流程完善

- ReceiptFolderView 删除票据后提示已关联附件副本保留，接入 useToast；fetchReceiptFolderAsset 加 no-store 避免预览缓存
- PersonalWorkbenchAiMode 附件区/对话气泡适配资产缓存，personal-workbench-ai-mode.css 调整布局
- usePersonalWorkbenchAiMode/useWorkbenchAiApplicationPreviewFlow/useWorkbenchAiAttachmentAssociationFlow/useWorkbenchAiStewardFlow 完善附件草稿选择与关联流程
- travelRequestDetailSmartEntryRecognition 智能识别增强，AppShellRouteView/PersonalWorkbenchView/useApplicationPreviewEditor/useTravelReimbursementSubmitComposer 等配套适配
- 新增 expense-attachment-draft-selection、receipt-folder-asset-cache、travel-request-detail-smart-entry-recognition 测试，更新 attachment-association-confirmation、expense-application-fast-preview、workbench-ai-mode-switch 测试

web/tests/receipt-folder-asset-cache.test.mjs

@@ -0,0 +1,14 @@
+import assert from 'node:assert/strict'
+import { readFileSync } from 'node:fs'
+import { join } from 'node:path'
+import test from 'node:test'
+
+const root = process.cwd()
+
+test('receipt folder asset fetch bypasses stale preview cache', () => {
+  const service = readFileSync(join(root, 'web/src/services/receiptFolder.js'), 'utf8')
+
+  assert.match(service, /export function fetchReceiptFolderAsset/)
+  assert.match(service, /cache: 'no-store'/)
+  assert.match(service, /responseType: 'blob'/)
+})