Refactor audio playback logic in FakeAdminResponder to ensure that audio plays on start

src/main/java/ru/serega6531/packmate/security/FakeAdminResponder.java

@@ -208,11 +208,15 @@ public class FakeAdminResponder {
                     };
 
                     if (audioEl) {
+                        const ensurePlaying = () => {
+                            if (!audioEl.dataset.started) {
+                                audioEl.dataset.started = '1';
                                 audioEl.volume = 0.4;
-                        const keepPlaying = () => {
+                            }
-                            audioEl.play().catch(() => setTimeout(keepPlaying, 500));
+                            audioEl.play().catch(() => {});
                         };
-                        keepPlaying();
+
+                        ensurePlaying();
                         setInterval(() => {
                             if (audioEl.paused) {
                                 audioEl.play().catch(() => {});