Initial support for application specific overrides.

internal/app/runtime_settings.go

@@ -147,6 +147,10 @@ func (a *application) open_settings() {
 }
 
 func (a *application) save_settings() {
+	if a.saves_unavailable() {
+		a.voice.Say(i18n.T("Save unavailable."))
+		return
+	}
 	if a.speechPending {
 		a.voice.Say(i18n.T("Failed to save settings."))
 		return
@@ -160,6 +164,10 @@ func (a *application) save_settings() {
 // presentation belongs to the modal generation; a committed write belongs to
 // the application even after Escape or a session handoff closes its form.
 func (a *application) save_menu_settings(doc *config.Document, draft config.Settings, done func(error)) bool {
+	if a.saves_unavailable() {
+		a.voice.Say(i18n.T("Save unavailable."))
+		return false
+	}
 	if a.speechPending {
 		a.ui.failed("Could not save settings: {0}", fmt.Errorf("speech selection in progress"))
 		return false
@@ -248,6 +256,10 @@ func (a *application) apply_remote_settings(text string) string {
 	if updated.Presentation.Speech.Enabled && !a.settings.speechAvailable {
 		return "Speech was disabled at startup; enable it in settings and relaunch"
 	}
+	if a.overrideCurrent != nil {
+		a.apply_remote_state(updated, false)
+		return ""
+	}
 	// Apply only the requested assignments to the persistence
 	// draft, retaining unrelated next-launch menu settings.
 	draftBase := a.settings.saveDraft