feat(web): AI 工作台多 task 串行推进与会话适配

- useWorkbenchAiApplicationPreviewFlow/useWorkbenchAiActionRouter/useWorkbenchAiCommandIntents 支持 task1 完成后自动推进 task2，确认按钮直接拉起申请预览，草稿/提交成功后继续推进下一 task
- workbenchAiIntentPlannerModel/workbenchAiMessageModel/workbenchAiCommandIntentModel 适配多 task 意图规划与消息结构
- aiApplicationPreviewActions/aiApplicationPrecheckModel/aiExpenseDraftModel/aiWorkbenchConversationStore 草稿与会话存储适配
- PersonalWorkbenchAiMode 与样式适配，更新 preview-actions/expense-draft/conversation-store/fast-preview/action-router/command-intent/intent-planner 测试

web/tests/ai-application-preview-actions.test.mjs

@@ -95,9 +95,62 @@ async function testSaveDraftActionUsesFastPreviewEndpoint() {
   assert.equal(body.context_json.application_stage, 'expense_application')
 }
 
+async function testEditDraftActionCarriesClaimAndEditableFields() {
+  let capturedOptions = null
+
+  global.fetch = async (_url, options) => {
+    capturedOptions = options
+    return {
+      ok: true,
+      async json() {
+        return {
+          status: 'succeeded',
+          result: {
+            draft_payload: {
+              claim_id: 'claim-edit-application',
+              claim_no: 'AP-20260620-EDIT',
+              status: 'draft',
+              approval_stage: '待提交'
+            }
+          }
+        }
+      }
+    }
+  }
+
+  await runAiApplicationPreviewAction({
+    actionType: AI_APPLICATION_ACTION_SAVE_DRAFT,
+    applicationPreview: {
+      applicationEditMode: true,
+      editableFields: ['reason', 'time', 'location', 'transportMode'],
+      fields: {
+        applicationType: '差旅费用申请',
+        time: '2026-07-01 至 2026-07-03',
+        location: '北京',
+        reason: '项目实施',
+        days: '3天',
+        transportMode: '火车',
+        amount: '1000元'
+      }
+    },
+    currentUser: { username: 'zhangsan@example.com', name: '张三' },
+    draftPayload: {
+      claim_id: 'claim-edit-application',
+      claim_no: 'AP-20260620-EDIT',
+      status: 'returned'
+    }
+  })
+
+  const body = JSON.parse(capturedOptions.body)
+  assert.equal(body.context_json.application_edit_claim_id, 'claim-edit-application')
+  assert.equal(body.context_json.application_edit_mode, true)
+  assert.deepEqual(body.context_json.application_editable_fields, ['reason', 'time', 'location', 'transportMode'])
+}
+
 async function run() {
   await testSubmitActionUsesFastPreviewEndpoint()
   await testSaveDraftActionUsesFastPreviewEndpoint()
+  await testEditDraftActionCarriesClaimAndEditableFields()
   console.log('ai-application-preview-actions tests passed')
 }