fix: harden run persistence and error surfacing from code review

Snapshot store paths under lock before async runs, roll back failed
start/save state, emit UI events only after successful persistence,
surface log write failures, and sync stale YAML docs to JSON.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/platform.go

@@ -9,7 +9,9 @@ import (
 // store.Paths.DesktopIcon so ApplyAutostart can reference it.
 func (s *Service) InstallDesktopIcon(appID string, iconBytes []byte) {
 	if iconPath, err := desktop.InstallDesktopIntegration(appID, s.store.Paths.ExecutablePath, iconBytes); err == nil {
+		s.mu.Lock()
 		s.store.Paths.DesktopIcon = iconPath
+		s.mu.Unlock()
 	}
 }