use wake lock

(cherry picked from commit 8a9552fa)

src/jensen.js

@@ -704,7 +704,8 @@ Jensen.prototype.getFile = async function (filename, length, ondata, onprogress)
     let fname = [];
     for (let i = 0; i < filename.length; i++) fname.push(filename.charCodeAt(i));
 
-    function visibilitychange() {
+    let wakeLock = null;
+    async function visibilitychange() {
         let audio = document.getElementById('test_audio');
         if (!audio) {
             audio = document.createElement('audio');
@@ -719,15 +720,25 @@ Jensen.prototype.getFile = async function (filename, length, ondata, onprogress)
         if (document.visibilityState === 'hidden') {
             console.log('Page is hidden');
             audio.play();
+            if ('wakeLock' in navigator) {
+                try {
+                    wakeLock = await navigator.wakeLock.request('screen');
+                    console.log('Wake lock activated');
+                } catch (err) {
+                    console.error('Failed to acquire wake lock:', err);
+                }
+            }
         } else {
             audio.pause();
             console.log('Page is visible');
+            wakeLock && wakeLock.release();
         }
     }
 
     function removeAudio() {
         const audio = document.getElementById('test_audio');
         audio && audio.pause() && audio.remove();
+        wakeLock && wakeLock.release();
     }
 
     visibilitychange();