fix: risoluzione importazione playlist tramite link di condivisione e fix installabilità PWA su Android

src/app/app.component.ts

@@ -19,21 +19,31 @@ export class AppComponent {
 
   private setupUpdates() {
     if (this.swUpdate.isEnabled) {
-      // 1. Check for updates immediately as soon as the application stabilizes
-      const appIsStable$ = this.appRef.isStable.pipe(
-        first(isStable => isStable === true)
-      );
+      // Wait for the application to stabilize before running update checks or starting intervals
+      this.appRef.isStable.pipe(
+        filter(stable => stable),
+        first()
+      ).subscribe(() => {
+        console.log('[PWA-Update] App is stable. Initializing update checks...');
+        
+        // 1. Check for updates immediately
+        this.swUpdate.checkForUpdate().catch(err => {
+          console.warn('[PWA-Update] Failed immediate startup update check:', err);
+        });
 
-      appIsStable$.subscribe(async () => {
-        console.log('[PWA-Update] App is stable, checking for PWA updates immediately...');
-        try {
-          await this.swUpdate.checkForUpdate();
-        } catch (err) {
-          console.warn('[PWA-Update] Failed startup update check:', err);
-        }
+        // 2. Periodic check in background every 30 seconds
+        const every30Seconds$ = interval(30 * 1000);
+        every30Seconds$.subscribe(async () => {
+          console.log('[PWA-Update] Periodic check for updates (every 30s)...');
+          try {
+            await this.swUpdate.checkForUpdate();
+          } catch (err) {
+            console.warn('[PWA-Update] Failed periodic update check:', err);
+          }
+        });
       });
 
-      // 2. Check for updates when the app is resumed/focused
+      // 3. Check for updates when the app is resumed/focused
       fromEvent(document, 'visibilitychange')
         .pipe(filter(() => document.visibilityState === 'visible'))
         .subscribe(async () => {
@@ -45,17 +55,6 @@ export class AppComponent {
           }
         });
 
-      // 3. Periodic check in background every 5 minutes
-      const everyFiveMinutes$ = interval(5 * 60 * 1000);
-      everyFiveMinutes$.subscribe(async () => {
-        console.log('[PWA-Update] Periodic check for updates...');
-        try {
-          await this.swUpdate.checkForUpdate();
-        } catch (err) {
-          console.warn('[PWA-Update] Failed periodic update check:', err);
-        }
-      });
-
       // 4. Activate update and reload when a new version is ready
       this.swUpdate.versionUpdates
         .pipe(filter((evt): evt is VersionReadyEvent => evt.type === 'VERSION_READY'))