修复：防止异步响应覆盖与打印资源泄漏

shierfeng-fastapi-frontend/src/components/BusinessUserAssignDialog/index.vue

@@ -104,6 +104,7 @@ const users = ref([]);
 const selectedUserIds = ref([]);
 const userTableRef = ref();
 const restoringSelection = ref(false);
+let loadGeneration = 0;
 
 const dialogTitle = computed(() => {
   const label = resourceType.value === "site" ? "客户现场" : "仓库";
@@ -171,12 +172,26 @@ function handleRowClick(row, column) {
   restoreSelection();
 }
 
+function isCurrentUserLoad(loadContext) {
+  return loadContext.generation === loadGeneration
+    && loadContext.resourceType === resourceType.value
+    && loadContext.resourceId === resourceId.value;
+}
+
 function loadUsers() {
-  const resourceApi = resourceApiMap[resourceType.value];
+  const loadContext = {
+    generation: ++loadGeneration,
+    resourceType: resourceType.value,
+    resourceId: resourceId.value
+  };
+  const resourceApi = resourceApiMap[loadContext.resourceType];
   loading.value = true;
   loadFailed.value = false;
   loadError.value = "";
-  resourceApi.getUsers(resourceId.value).then((response) => {
+  resourceApi.getUsers(loadContext.resourceId).then((response) => {
+    if (!isCurrentUserLoad(loadContext)) {
+      return;
+    }
     const rows = Array.isArray(response.data) ? response.data : [];
     users.value = normalizeUserRows(rows);
     selectedUserIds.value = users.value
@@ -184,16 +199,24 @@ function loadUsers() {
       .map((user) => user.userId);
     restoreSelection();
   }).catch(() => {
+    if (!isCurrentUserLoad(loadContext)) {
+      return;
+    }
     users.value = [];
     selectedUserIds.value = [];
     loadError.value = "用户列表加载失败，请稍后重试";
     loadFailed.value = true;
   }).finally(() => {
+    if (!isCurrentUserLoad(loadContext)) {
+      return;
+    }
     loading.value = false;
   });
 }
 
 function resetDialogState() {
+  loadGeneration += 1;
+  loading.value = false;
   loadError.value = "";
   keyword.value = "";
   resourceType.value = "";

shierfeng-fastapi-frontend/src/views/master/pallet/index.vue

@@ -255,14 +255,25 @@ function handlePrint(row) {
   }
 
   let objectUrl;
+  let closeMonitorId;
+  let cleanupFinished = false;
   setPrinting(row.palletId, true);
-  const revokeObjectUrl = () => {
+  const cleanupPrint = () => {
+    if (cleanupFinished) return;
+    cleanupFinished = true;
+    if (closeMonitorId !== undefined) {
+      window.clearInterval(closeMonitorId);
+      closeMonitorId = undefined;
+    }
     if (objectUrl) {
       URL.revokeObjectURL(objectUrl);
       objectUrl = undefined;
     }
     setPrinting(row.palletId, false);
   };
+  closeMonitorId = window.setInterval(() => {
+    if (printWindow.closed) cleanupPrint();
+  }, 250);
 
   getPalletQrcode(row.palletId).then((qrCodeBlob) => {
     if (printWindow.closed) throw new Error("打印窗口已关闭");
@@ -282,16 +293,12 @@ function handlePrint(row) {
       printWindow.print();
     }, { once: true });
     imageElement.addEventListener("error", () => {
-      revokeObjectUrl();
+      cleanupPrint();
       printWindow.close();
       proxy.$modal.msgError("二维码图片加载失败");
     }, { once: true });
     printWindow.addEventListener("afterprint", () => {
-      if (objectUrl) {
-        URL.revokeObjectURL(objectUrl);
-        objectUrl = undefined;
-      }
-      setPrinting(row.palletId, false);
+      cleanupPrint();
       printWindow.close();
     }, { once: true });
 
@@ -299,7 +306,7 @@ function handlePrint(row) {
     printWindow.document.head.append(styleElement);
     printWindow.document.body.replaceChildren(titleElement, imageElement);
   }).catch(() => {
-    revokeObjectUrl();
+    cleanupPrint();
     if (!printWindow.closed) printWindow.close();
     proxy.$modal.msgError("二维码获取失败");
   });