feat(ai): add expense application feedback ledger

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

@@ -42,6 +42,16 @@ async function testSubmitActionUsesFastPreviewEndpoint() {
         days: '3天',
         transportMode: '火车',
         amount: '1000元'
+      },
+      aiDecisionFeedback: {
+        schemaVersion: 1,
+        changedFields: [
+          {
+            fieldKey: 'transportMode',
+            suggestedValue: '飞机',
+            finalValue: '火车'
+          }
+        ]
       }
     },
     currentUser: { username: 'zhangsan@example.com', name: '张三' },
@@ -54,6 +64,13 @@ async function testSubmitActionUsesFastPreviewEndpoint() {
   assert.equal(body.context_json.session_type, 'application')
   assert.equal(body.context_json.application_stage, 'expense_application')
   assert.equal(body.context_json.application_preview.fields.transportMode, '火车')
+  assert.deepEqual(body.context_json.application_preview.aiDecisionFeedback.changedFields, [
+    {
+      fieldKey: 'transportMode',
+      suggestedValue: '飞机',
+      finalValue: '火车'
+    }
+  ])
 }
 
 async function testSaveDraftActionUsesFastPreviewEndpoint() {