A rejected save, such as an Actions rule with an invalid webhook URL, only
flashed "Unprocessable content" for 1.5 s. Show the server's message that
names the field under it, keep such toasts up for 5 s, and let the iOS
toast wrap that line instead of cutting it off.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>