feat：绑定设备和设备详情

src/pages/add-device/scan/index.vue

@@ -20,7 +20,15 @@
           </text>
         </view>
 
-        <view class="scan-page__list">
+        <view v-if="scanError" class="scan-page__empty">
+          <text class="scan-page__empty-text">{{ scanError }}</text>
+        </view>
+        <view v-else-if="devices.length === 0" class="scan-page__empty">
+          <text class="scan-page__empty-text">
+            {{ scanning ? '正在搜索附近蓝牙设备...' : '未发现附近设备，请确认设备已开机并靠近手机' }}
+          </text>
+        </view>
+        <view v-else class="scan-page__list">
           <scan-device-item
             v-for="item in devices"
             :key="item.id"
@@ -52,6 +60,7 @@ const {
   selectedId,
   secondsLeft,
   scanning,
+  scanError,
   onSelectDevice,
   onDeviceAction,
 } = useScanDevice()