fix: 修复平台定制背景图未撑满屏幕

@@ -21,7 +21,7 @@ export const getVideoTypeByUrl = (url: string) => {
     const type = VideoPlayerType[ext];
     return type ? type : VideoPlayerType.webm;
   } catch (error) {
-    console.error(error);
+    console.error(`url: '${url}' is invalid!`);
     return VideoPlayerType.webm;
   }
 };

@@ -68,16 +68,17 @@ export const usePlatform = async () => {
       .vben-login::before{
         background-image:url("${background || lightThemeBgImage}");
         position:absolute;
+        background-size: ${background ? '100%' : 'auto'} 100% !important;
         margin-left: ${background ? 0 : '-48%'} !important;
       }
       html[data-theme='dark'] .vben-login::before{
         background-image:url("${background || darkThemeBgImage}");
         position:absolute;
+        background-size: ${background ? '100%' : 'auto'} 100% !important;
         margin-left: ${background ? 0 : '-48%'} !important;
       }
     `;
 
-    console.log(styleEl);
     document.head.appendChild(styleEl);
   };