feat(expenses): backfill historical claims into expense cases

web/tests/expense-case-timeline.test.mjs

@@ -100,6 +100,64 @@ test('expense case timeline gives returned events an actionable reason', () => {
   assert.equal(timeline.events[0].summary, '住宿票据缺少入住人信息')
 })
 
+test('expense case timeline explains a historical import without pretending it is a business action', () => {
+  const timeline = buildExpenseCaseTimelineViewModel({
+    events: [
+      {
+        id: 'historical-import-1',
+        event_type: 'historical_claim_imported',
+        actor_id: 'migration-worker',
+        actor_type: 'user',
+        occurred_at: '2026-07-14T03:00:00Z',
+        correlation_id: 'private-correlation',
+        delivery_status: 'pending',
+        payload_json: {
+          reason: '不应覆盖历史导入事件的专用说明',
+          next_status: 'submitted',
+          next_approval_stage: '直属领导审批',
+          migration_batch_id: 'private-batch',
+          source_table: 'expense_claims'
+        }
+      }
+    ]
+  })
+
+  const [event] = timeline.events
+  assert.equal(event.label, '历史单据已纳入统一费用事件')
+  assert.equal(event.icon, 'mdi mdi-history')
+  assert.equal(event.tone, 'info')
+  assert.equal(event.actorLabel, '系统')
+  assert.equal(
+    event.summary,
+    '系统已根据原单据建立费用事件档案。纳入时状态：已提交 · 纳入时节点：直属领导审批。导入前办理记录以原单据为准，后续动作将在此持续记录。'
+  )
+  assert.doesNotMatch(
+    JSON.stringify(event),
+    /不应覆盖|private-correlation|pending|private-batch|expense_claims/
+  )
+})
+
+test('expense case timeline keeps the historical import summary honest when state is missing', () => {
+  const timeline = buildExpenseCaseTimelineViewModel({
+    events: [
+      {
+        id: 'historical-import-without-state',
+        event_type: 'historical_claim_imported',
+        actor_id: 'system',
+        occurred_at: '2026-07-14T03:00:00Z',
+        payload_json: {}
+      }
+    ]
+  })
+
+  const [event] = timeline.events
+  assert.equal(
+    event.summary,
+    '系统已根据原单据建立费用事件档案。导入前办理记录以原单据为准，后续动作将在此持续记录。'
+  )
+  assert.doesNotMatch(event.summary, /纳入时状态|纳入时节点|undefined|null/)
+})
+
 test('expense case timeline describes application archive against the paid reimbursement', () => {
   const timeline = buildExpenseCaseTimelineViewModel({
     events: [