uninstallStt static method
Uninstall the active STT model — deletes all its files and clears the active-STT identity. No-op if none active.
Implementation
static Future<void> uninstallStt() async {
final manager = FlutterGemmaPlugin.instance.modelManager;
final spec = manager.activeSttModel;
if (spec == null) return;
await manager.deleteModel(spec);
await manager.clearActiveSttIdentity();
}