feat(M08-B): 补后台协作与结算详情

backend/tests/cleaning-route.test.mjs

@@ -114,6 +114,13 @@ const app = await buildApp({
         calls.push(['listSettlements', input]);
         return { items: [settlementResponse(input.status || 'DRAFT')], total: 1, page: input.page, pageSize: input.pageSize };
       },
+      async getSettlementDetail(input) {
+        calls.push(['getSettlementDetail', input]);
+        return {
+          settlement: settlementResponse('DRAFT'),
+          items: [settlementItemResponse()]
+        };
+      },
       async generateSettlement(input) {
         calls.push(['generateSettlement', input]);
         return settlementResponse('DRAFT');
@@ -367,6 +374,15 @@ assert.equal(settlementList.statusCode, 200);
 assert.equal(calls.at(-1)[0], 'listSettlements');
 assert.equal(calls.at(-1)[1].status, 'DRAFT');
 
+const settlementDetail = await app.inject({
+  method: 'GET',
+  url: '/admin-api/cleaning/settlements/501',
+  headers: { authorization: `Bearer ${token}` }
+});
+assert.equal(settlementDetail.statusCode, 200);
+assert.equal(calls.at(-1)[0], 'getSettlementDetail');
+assert.equal(settlementDetail.json().data.items[0].taskNo, 'CLN-20260625-0001');
+
 const generatedSettlement = await app.inject({
   method: 'POST',
   url: '/admin-api/cleaning/settlements',
@@ -542,6 +558,24 @@ function settlementResponse(status) {
   };
 }
 
+function settlementItemResponse() {
+  return {
+    id: '601',
+    settlementId: '501',
+    taskId: '101',
+    taskNo: 'CLN-20260625-0001',
+    orderNo: 'O301',
+    storeName: 'Test Store',
+    roomName: 'A Room',
+    roomNo: 'A01',
+    cleanerUserId: '31',
+    cleanerName: 'Cleaner',
+    rewardCents: 600,
+    completedAt: new Date(),
+    createdAt: new Date()
+  };
+}
+
 function member(memberRole, userId, rewardCents) {
   return {
     id: `${userId}01`,