Read Wine settings live at poll and spawn

Phase 2 of the Wine/Proton stage (decisions 3, 4, 16, 17, 19 in docs/testing/wine-proton.md): replace the Wine manager's startup snapshot with a live settings source read once per poll, so accepted global settings take effect with no reader restart. The source publishes only the active/global profile's Wine values; per-application profile switching never changes the governing list. A newly listed running program restarts its helper once in the same mode; removals and clearing the global switch never downgrade a running helper.

internal/app/progress_settings.go

@@ -29,7 +29,7 @@ func (worker *preferencesWorker) cycle_progress_output() {
 		for application, settings := range worker.appSettings {
 			worker.appSettings[application] = config.RebaseApplicationSettings(worker.globalSettings, profileNext, settings)
 		}
-		worker.globalSettings = profileNext
+		worker.setGlobalSettings(profileNext)
 	}
 	worker.commit_settings(next)
 	worker.announceSpeechSetting(message)