Fix cluster backup auto-confirm and confirmation Init

- Skip confirmation dialog in auto-confirm mode for cluster backup
- Call confirm.Init() to trigger auto-confirm message

internal/tui/menu.go

@@ -345,6 +345,11 @@ func (m *MenuModel) handleClusterBackup() (tea.Model, tea.Cmd) {
 		m.message = errorStyle.Render("❌ Cluster backup is available only for PostgreSQL targets")
 		return m, nil
 	}
+	// Skip confirmation in auto-confirm mode
+	if m.config.TUIAutoConfirm {
+		executor := NewBackupExecution(m.config, m.logger, m, m.ctx, "cluster", "", 0)
+		return executor, executor.Init()
+	}
 	confirm := NewConfirmationModelWithAction(m.config, m.logger, m,
 		"🗄️  Cluster Backup",
 		"This will backup ALL databases in the cluster. Continue?",
@@ -352,7 +357,7 @@ func (m *MenuModel) handleClusterBackup() (tea.Model, tea.Cmd) {
 			executor := NewBackupExecution(m.config, m.logger, m, m.ctx, "cluster", "", 0)
 			return executor, executor.Init()
 		})
-	return confirm, nil
+	return confirm, confirm.Init()
 }
 
 // handleViewOperations shows active operations