feat(app): show instance branding in switchers and pickers (#3289)

fluxer_app/src/features/app/state/ActiveInstanceProductName.ts

@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import {PRODUCT_NAME} from '@app/features/app/config/ProductConstants';
+import RuntimeConfig from '@app/features/app/state/RuntimeConfig';
+
+export function getActiveInstanceProductName(): string {
+	return RuntimeConfig.getSnapshotOrNull()?.appPublic.branding.product_name?.trim() || PRODUCT_NAME;
+}