fix(updater): install the already downloaded update instead of fetching it again

src/components/setting/mods/update-viewer.tsx

@@ -15,7 +15,7 @@ import type { Options as ReactMarkdownOptions } from 'react-markdown'
 
 import { BaseDialog, DialogRef } from '@/components/base'
 import { useUpdate } from '@/hooks/use-update'
-import { restartApp } from '@/services/cmds'
+import { installCachedUpdate, restartApp } from '@/services/cmds'
 import { showNotice } from '@/services/notice-service'
 import { useSetUpdateState, useUpdateState } from '@/services/states'
 import { openExternalUrl } from '@/utils/open-external-url'
@@ -270,7 +270,9 @@ export function UpdateViewer({ ref }: { ref?: Ref<DialogRef> }) {
     }
 
     try {
-      await updateInfo.downloadAndInstall(onDownloadEvent)
+      if (!(await installCachedUpdate(updateInfo.version))) {
+        await updateInfo.downloadAndInstall(onDownloadEvent)
+      }
       await restartApp()
     } catch (err: any) {
       showNotice.error(err)