fix: 修复主题背景图片URL构建逻辑

src/main/utils/index.ts

@@ -263,7 +263,7 @@ export const getTheme = () => {
         theme.config.extInfo['--background-image'] =
           isUrl(theme.config.extInfo['--background-image'])
             ? `url(${theme.config.extInfo['--background-image']})`
-            : `url(file:///${encodePath(joinPath(global.lxDataPath, 'theme_images', theme.config.extInfo['--background-image']))})`
+            : `url(${encodePath(joinPath(global.lxDataPath, 'theme_images', theme.config.extInfo['--background-image']))})`
       }
     } else {
       themeId = global.lx.appSetting['theme.id'] == 'auto' && shouldUseDarkColors ? 'black' : 'green'

src/renderer/store/utils.ts

@@ -18,7 +18,7 @@ export const assertApiSupport = (source: LX.Source): boolean => {
 export const buildBgUrl = (originUrl: string, dataPath: string): string => {
   return isUrl(originUrl)
     ? `url(${originUrl})`
-    : `url(file:///${encodePath(joinPath(dataPath, originUrl).replaceAll('\\', '/'))})`
+    : `url(${encodePath(joinPath(dataPath, originUrl).replaceAll('\\', '/'))})`
 }
 
 export const getThemes = (callback: (themeInfo: LX.ThemeInfo) => void) => {