Reworks the #5552 preset builder per maintainer UX feedback + Fable design advisory: one natural 'Schedule: [preset] on [day] at [time]' row; native time picker (themed) replacing hour/minute number boxes; day-of-week + day-of-month dropdowns; raw cron field shown only on Custom; live cron preview; Custom last; new jobs default to Daily 09:00; keystroke-clamp + mid-typing-hide bugs fixed. New i18n keys across all 14 locales. Full gate: Codex SAFE, Fable SHIP-UX, suite 12160/0, browser clean.
Co-authored-by: Rod Boev <rod.boev@gmail.com>
