修复绑定设备BUG

src/components/Signin.vue

@@ -57,7 +57,7 @@ const handleLogin = () => {
         avatarUrl: avatarUrl.value,
       });
       const devices = await getMyDevicesAPI();
-      if (devices.bindings.length) {
+      if (devices.bindings && devices.bindings.length) {
         updateDevice(
           devices.bindings[0].deviceId,
           devices.bindings[0].deviceName
@@ -96,7 +96,7 @@ const handleLogin = () => {
         type="nickname"
         class="nickname-input"
         placeholder="请输入昵称"
-        placeholder-style="color: #ccc" 
+        placeholder-style="color: #ccc"
         @change="onNicknameChange"
         @blur="onNicknameBlur"
       />