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* feat: custom cron cadence for scheduled chats Scheduled chats could only be built from four fixed presets, each pinned to a single hour and minute, so anything outside that shape (twice a day, every 15 minutes, the 1st of the month) was not expressible. This adds a Custom cadence that takes a raw five-field cron expression. The cadence schema becomes a discriminated union on `frequency`. A cron row carries `expression` instead of the hour and minute it cannot represent, since there is no single hour for `0 9,17 * * 1-5`, and the Mongo schema requires each field only for the shape that has it: a blanket `required` would reject every cron write, and dropping it entirely would let a structured cadence silently fire at 00:00 with a missing hour. Five fields only. croner also reads a six-field form carrying seconds and a seven-field form that pins a year, and both are refused. Seconds would promise a precision the engine does not keep, since it polls on a thirty-second tick and offsets each schedule by up to two minutes of jitter. A pinned year makes a cadence that runs out, and every place that computes a next run reads "no next occurrence" as a cadence it cannot read. Compilation, validation, next-run previews and interval measurement live in packages/data-provider so the dialog and the engine share one parser and cannot drift. The dialog previews the next occurrences, enforces the admin interval floor and disables its own submit from the same functions the server validates with, so it cannot offer a Create the API answers 400 to. The interval floor now covers cron, and measures it twice, taking the smaller. The nominal gap is probed in UTC and discounted by the same worst-case DST allowance the structured branches carry, which keeps `0 9 * * *` reporting exactly what the Daily preset reports. Real elapsed time is then measured in the schedule's own zone across each of that zone's transitions, because spring-forward compresses a gap that straddles one: `0 0,12 * * *` in America/New_York is 11 hours that day, not 12, and a floor between the two would otherwise be bypassed. The floor ships with the schedules list so the dialog can mirror it rather than surfacing it as a 400 after submit. Radio gains a wrap variant, since five frequency segments no longer fit one row in a phone-width dialog and a translated label can push even a desktop one over. Its indicator follows the selection across rows; the single-row default is unchanged. * fix: mark the cron input invalid when the interval floor rejects it A floor-violating expression disabled Create and rendered the cadence message, but the input itself still said aria-invalid=false and its aria-describedby never reached that message, leaving a screen reader user with a disabled Create and no stated reason. |
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