Sources: configurable daily update-check time + next-run visibility (with catch-up)

[jozef2svrcek]

Summary

Since the schedule surfaces were removed (#160/#180), the Sources page no longer shows when the next sync will happen, and there's no way to control it. Restore both: surface the next scheduled check per feed, and let the user set the daily check time.

Desired behaviour

• One global daily check time for all feeds (a single HH:MM, local). TWIC and Lichess Broadcasts are both checked daily (TWIC's real cadence is weekly, Lichess's is monthly — a daily check just fetches new data as soon as it lands).
• Catch-up if missed: if the machine was off at the scheduled time, the check runs at the earliest possible moment after it (the scheduler already models this via last_run < most_recent_scheduled).
• Visibility: each enabled feed shows its last sync and the next scheduled check ("next check ~04:00, in 3h") on the Sources page.
• Configurable from the Sources page (editable time control).

Notes / where

• The scheduler still has schedule.daily_minute + most_recent_scheduled + feeds_due_for_resync (scheduler.rs) — the mechanism exists; this is mostly re-exposing it. The GET/PUT /schedule endpoints were pruned in Prune orphaned schedule endpoints + run-now path (dead after #160) #180 and would need re-adding (a minimal get/set for the daily time).
• Ajedrez is a one-time bulk source and must NOT appear here as a recurring schedule (see the Ajedrez ticket).

Related

#160 (unified update schedule — removed the global toggle), #180 (pruned schedule endpoints), scheduler.rs.

[jozef2svrcek]

Also cover the FIDE player-list refresh

The monthly FIDE-list refresh is another scheduled background update on the same scheduler tick, and it lost its visibility too — so it belongs in this ticket's scope:

• Timing/catch-up: mostly already there. The tick submits fide_refresh {if_due:true} when fide::refresh_due reports it's monthly-overdue, so 'run at the earliest moment after due' is inherent. Optional refinement: gate the FIDE refresh to the same global off-peak daily check time (today it fires as soon as it's due on any tick — harmless for a monthly job, but aligning it is tidier).
• Visibility: surface the FIDE list's last-refreshed + next-due alongside the feeds' next-check readout. Since FIDE isn't a catalog source (no Sources card), show it in the Maintenance → FIDE section rather than a per-source card.

(Mirrors the note in #176 about surfacing the monthly FIDE refresh somewhere.)