Update app.py

app.py

@@ -394,6 +394,7 @@ TMA_DASHBOARD_HTML_TEMPLATE = '''
 <div class="app-header">
     <div class="user-info">{{ display_name }}</div>
     <div class="view-toggle">
+        <button id="install-app-btn" title="Установить приложение" style="display: none;"><i class="fa-solid fa-arrow-down-to-bracket"></i></button>
         <button id="reminders-btn" title="Напоминания"><i class="fa-solid fa-bell"></i></button>
         <button id="grid-view-btn" title="Сетка"><i class="fa fa-th-large"></i></button>
         <button id="list-view-btn" title="Список"><i class="fa fa-bars"></i></button>
@@ -782,6 +783,24 @@ TMA_DASHBOARD_HTML_TEMPLATE = '''
             backButton.show();
             backButton.onClick(() => { haptic.impactOccurred('light'); window.location.href = `{{ url_for('tma_dashboard') }}?folder_id=${parentFolderId}`; });
         } else { window.Telegram.WebApp.BackButton.hide(); }
+        const installBtn = document.getElementById('install-app-btn');
+        if (installBtn) {
+            const checkAndShowInstallButton = () => {
+                if (Telegram.WebApp.isVersionAtLeast('6.9') && !Telegram.WebApp.isAddedToAttachmentMenu) {
+                    installBtn.style.display = 'inline-block';
+                } else {
+                    installBtn.style.display = 'none';
+                }
+            };
+            installBtn.addEventListener('click', () => {
+                haptic.impactOccurred('light');
+                Telegram.WebApp.addToAttachmentMenu();
+            });
+            Telegram.WebApp.onEvent('addedToAttachmentMenu', () => {
+                installBtn.style.display = 'none';
+            });
+            checkAndShowInstallButton();
+        }
     });
 </script></body></html>
 '''