update：修复bug

src/pages/device/composables/useDeviceStatus.js

@@ -11,8 +11,10 @@ export function useDeviceStatus({
   user,
   device,
   deviceStatus,
+  deviceUsageDuration,
   online,
   updateDevice,
+  updateDeviceUsageDuration,
   clearDevice,
   unbindDialogVisible,
 }) {
@@ -41,14 +43,28 @@ export function useDeviceStatus({
   const batteryText = computed(() =>
     battery.value === null ? "暂无数据" : `${battery.value}%`
   );
+  const normalizeDuration = (value) => {
+    if (value == null || String(value).trim() === "") return null;
+    const seconds = Number(value);
+    return Number.isFinite(seconds) && seconds >= 0 ? seconds : null;
+  };
+
   const onlineDurationText = computed(() => {
-    const rawDuration = deviceStatus.value.onlineDuration;
-    if (rawDuration == null || String(rawDuration).trim() === "") return "--";
+    const currentDeviceId = String(device.value.deviceId || "");
+    const cachedDuration =
+      String(deviceUsageDuration.value.deviceId || "") === currentDeviceId
+        ? normalizeDuration(deviceUsageDuration.value.seconds)
+        : null;
+    const durations = [
+      normalizeDuration(deviceStatus.value.onlineDuration),
+      normalizeDuration(deviceDetails.value.onlineDuration),
+      cachedDuration,
+    ].filter((value) => value !== null);
 
-    const seconds = Number(rawDuration);
-    if (!Number.isFinite(seconds) || seconds < 0) return "--";
+    if (!durations.length) return "--";
+    const seconds = Math.max(...durations);
 
-    // WS 推送秒数，页面按完整分钟展示累计使用时间。
+    // 累计时长应单调递增，页面按完整分钟展示当前已知最大值。
     const totalMinutes = Math.floor(seconds / 60);
     const hours = Math.floor(totalMinutes / 60);
     const minutes = totalMinutes % 60;
@@ -109,6 +125,7 @@ export function useDeviceStatus({
           detail.qrCodeUrl ?? deviceDetails.value.qrCodeUrl ?? ""
         ).trim(),
       };
+      updateDeviceUsageDuration(detail.onlineDuration, deviceId);
     } catch (error) {
       // 实时刷新失败时保留当前页面数据，等待下次通知或页面重新显示。
       console.log("刷新设备详情失败", error);
@@ -158,6 +175,7 @@ export function useDeviceStatus({
             latestDevice.name ||
             "我的智能弓"
         );
+        updateDeviceUsageDuration(latestDevice.onlineDuration, latestDevice.deviceId);
         return;
       }
       clearDevice();