!447 fix #I106OX 背板默认配置初始化错误

src/UI/Store/UserConfigStore.ts

@@ -48,6 +48,11 @@ export class UserConfigStore extends Singleton
         configs["薄背板"] = cloneConfig;
 
         cloneConfig = cloneBehindData(cloneConfig);
+        cloneConfig.option.thickness = 18;
+        cloneConfig.option.leftExt = 0;
+        cloneConfig.option.rightExt = 0;
+        cloneConfig.option.topExt = 0;
+        cloneConfig.option.bottomExt = 0;
         cloneConfig.option.name = "上挡板";
         cloneConfig.option.boardPosition = BehindHeightPositon.ForTop;
         cloneConfig.option.boardRelative = BrRelativePos.Front;
@@ -137,7 +142,7 @@ export class UserConfigStore extends Singleton
         else
         {
             let data = await PostJson(ConfigUrls.Get, { key }, false);
-            if (data.err_code === RequestStatus.Ok && data.value)
+            if (data.err_code === RequestStatus.Ok && data.value && data.value !== "{}")
             {
                 configs = JSON.parse(data.value);
                 appCache.set(key, JSON.parse(data.value));