Add fullscreen icon on the front mage

src/ts/storage/globalApi.ts

@@ -1468,4 +1468,8 @@ export async function fetchNative(url:string, arg:{
 
 export function textifyReadableStream(stream:ReadableStream<Uint8Array>){
     return new Response(stream).text()
+}
+
+export function toggleFullscreen(){
+    document.fullscreenElement ? document.exitFullscreen() : document.documentElement.requestFullscreen()
 }