更新跟价相关内容修改

frontend-vue/src/pages/brand/components/BrandDeleteBrandTab.vue

@@ -871,8 +871,12 @@ async function refreshTaskDetails(taskIds?: number[]) {
     if (changed) {
       syncResultState()
     }
-  } catch {
-    // ignore polling failures
+  } catch (error) {
+    const message = (error instanceof Error ? error.message : String(error || '')).toLowerCase()
+    const transient = ['无法连接到后端服务', 'bad gateway', 'gateway timeout', 'network error', 'timeout', '502', '503', '504'].some((pattern) => message.includes(pattern.toLowerCase()))
+    if (transient && chainStarted.value) {
+      queuePushResult.value = '当前任务运行中，正在等待后端服务恢复...'
+    }
   }
 }
 
@@ -1102,7 +1106,11 @@ async function loadHistory() {
     await refreshTaskDetails()
     ensurePolling(true)
   } catch (err) {
-    console.error('loadHistory error:', err)
+    const message = (err instanceof Error ? err.message : String(err || '')).toLowerCase()
+    const transient = ['无法连接到后端服务', 'bad gateway', 'gateway timeout', 'network error', 'timeout', '502', '503', '504'].some((pattern) => message.includes(pattern.toLowerCase()))
+    if (!transient) {
+      console.error('loadHistory error:', err)
+    }
   }
 }