Update app.py

app.py

@@ -789,12 +789,18 @@ TMA_DASHBOARD_HTML_TEMPLATE = '''
             backButton.onClick(() => { haptic.impactOccurred('light'); window.location.href = `{{ url_for('tma_dashboard') }}?folder_id=${parentFolderId}`; });
         } else { window.Telegram.WebApp.BackButton.hide(); }
         
+        const tg = window.Telegram.WebApp;
         const installContainer = document.getElementById('install-container');
         const installBtn = document.getElementById('install-app-btn');
-        if (window.Telegram.WebApp.isVersionAtLeast('6.9') && !window.Telegram.WebApp.isAddedToHomeScreen) {
+
+        if (tg.isVersionAtLeast('6.9') && !tg.isAddedToHomeScreen) {
             installContainer.style.display = 'block';
             installBtn.addEventListener('click', () => {
-                window.Telegram.WebApp.showAddToHomeScreen();
+                tg.showAddToHomeScreenPrompt(added => {
+                    if (added) {
+                        installContainer.style.display = 'none';
+                    }
+                });
             });
         }
     });