Instead of replacing /Applications/Pommedoro.app in-place while the
process is still running, the updater now stages the new .app to a
temp directory, spawns a background shell script that waits for the
current process to exit, then swaps the app and relaunches. This
ensures applicationWillTerminate fires to save timer state and avoids
corrupting the running binary.
Co-authored-by: Cursor <cursoragent@cursor.com>