fix: 修复版本号背景图展示不完全问题

src/pages/ota-wifi.vue

@@ -54,6 +54,8 @@ let wifiConnectPollCount = 0;
 const WIFI_CONNECT_POLL_INTERVAL = 2000;
 const WIFI_CONNECT_MAX_POLL_COUNT = 15;
 const WIFI_CONNECT_FAILED_TEXT = "连接失败，请检查WiFi密码或WiFi状态";
+const OTA_MIN_BATTERY = 20;
+const OTA_LOW_BATTERY_TEXT = "电量不足 50%，暂不支持 OTA 升级";
 // 控制授权拒绝弹窗显示/隐藏
 const wifiAuthDeniedVisible = ref(false);
 
@@ -437,7 +439,7 @@ const pollUpdateTaskStatus = (taskId) => {
 // 判断设备是否满足 OTA 更新条件，不满足时返回精确提示文案。
 const getUpdateDisabledReason = (deviceStatus) => {
   if (deviceStatus?.online !== true) return "请先开启智能弓";
-  if (Number(deviceStatus?.battery) <= 20) return "设备电量不足，请充电至 20% 以上后再更新";
+  if (Number(deviceStatus?.battery) <= OTA_MIN_BATTERY) return OTA_LOW_BATTERY_TEXT;
   if (String(deviceStatus?.netType || "").toLowerCase() !== "wifi") return "设备当前未连接 WiFi，请先连接 WiFi 后再更新";
   return "";
 };