feat(ai): add expense application feedback ledger

web/tests/expense-application-decision-feedback.test.mjs

@@ -0,0 +1,140 @@
+import assert from 'node:assert/strict'
+
+import { trackApplicationPreviewFieldEdit } from '../src/utils/expenseApplicationDecisionFeedback.js'
+
+function testTracksFirstExplicitEdit() {
+  const previous = {
+    fields: {
+      reason: '客户拜访',
+      location: '上海'
+    }
+  }
+  const next = {
+    ...previous,
+    fields: {
+      ...previous.fields,
+      reason: '客户现场实施'
+    }
+  }
+
+  const tracked = trackApplicationPreviewFieldEdit(previous, next, 'reason')
+
+  assert.deepEqual(tracked.aiDecisionFeedback.changedFields, [
+    {
+      fieldKey: 'reason',
+      suggestedValue: '客户拜访',
+      finalValue: '客户现场实施'
+    }
+  ])
+  assert.equal(tracked.aiDecisionFeedback.revision, 1)
+}
+
+function testKeepsOriginalSuggestionAcrossRepeatedEdits() {
+  const first = trackApplicationPreviewFieldEdit(
+    { fields: { transportMode: '火车' } },
+    { fields: { transportMode: '飞机' } },
+    'transportMode'
+  )
+  const second = trackApplicationPreviewFieldEdit(
+    first,
+    { ...first, fields: { transportMode: '自驾' } },
+    'transportMode'
+  )
+
+  assert.deepEqual(second.aiDecisionFeedback.changedFields, [
+    {
+      fieldKey: 'transportMode',
+      suggestedValue: '火车',
+      finalValue: '自驾'
+    }
+  ])
+}
+
+function testRemovesDiffWhenUserRestoresSuggestion() {
+  const edited = trackApplicationPreviewFieldEdit(
+    { fields: { location: '上海' } },
+    { fields: { location: '北京' } },
+    'location'
+  )
+  const restored = trackApplicationPreviewFieldEdit(
+    edited,
+    { ...edited, fields: { location: '上海' } },
+    'location'
+  )
+
+  assert.deepEqual(restored.aiDecisionFeedback.changedFields, [])
+}
+
+function testReturnDateUsesCanonicalTimeField() {
+  const tracked = trackApplicationPreviewFieldEdit(
+    { fields: { time: '2026-07-20 至 2026-07-22' } },
+    { fields: { time: '2026-07-20 至 2026-07-24' } },
+    'time_return'
+  )
+
+  assert.equal(tracked.aiDecisionFeedback.changedFields[0].fieldKey, 'time')
+}
+
+function testTracksDateAndDerivedDaysTogether() {
+  const previous = {
+    fields: {
+      time: '2026-02-20 至 2026-02-23',
+      days: '4天'
+    }
+  }
+  const next = {
+    fields: {
+      time: '2026-02-20 至 2026-02-24',
+      days: '5天'
+    }
+  }
+
+  const tracked = trackApplicationPreviewFieldEdit(
+    previous,
+    next,
+    ['time_return', 'days']
+  )
+
+  assert.deepEqual(tracked.aiDecisionFeedback.changedFields, [
+    { fieldKey: 'days', suggestedValue: '4天', finalValue: '5天' },
+    {
+      fieldKey: 'time',
+      suggestedValue: '2026-02-20 至 2026-02-23',
+      finalValue: '2026-02-20 至 2026-02-24'
+    }
+  ])
+  assert.equal(tracked.aiDecisionFeedback.revision, 1)
+
+  const editedAgain = trackApplicationPreviewFieldEdit(
+    tracked,
+    {
+      ...tracked,
+      fields: {
+        time: '2026-02-20 至 2026-02-25',
+        days: '6天'
+      }
+    },
+    ['time', 'days']
+  )
+  assert.equal(editedAgain.aiDecisionFeedback.changedFields[0].suggestedValue, '4天')
+  assert.equal(
+    editedAgain.aiDecisionFeedback.changedFields[1].suggestedValue,
+    '2026-02-20 至 2026-02-23'
+  )
+  assert.equal(editedAgain.aiDecisionFeedback.revision, 2)
+
+  const restored = trackApplicationPreviewFieldEdit(
+    editedAgain,
+    { ...editedAgain, fields: previous.fields },
+    ['time', 'days']
+  )
+  assert.deepEqual(restored.aiDecisionFeedback.changedFields, [])
+  assert.equal(restored.aiDecisionFeedback.revision, 3)
+}
+
+testTracksFirstExplicitEdit()
+testKeepsOriginalSuggestionAcrossRepeatedEdits()
+testRemovesDiffWhenUserRestoresSuggestion()
+testReturnDateUsesCanonicalTimeField()
+testTracksDateAndDerivedDaysTogether()
+console.log('expense-application-decision-feedback tests passed')