feat: add tablet of the day hero card with daily rotation (!11) · Merge requests · cdli / cdli mobile

Stacked on !10

Summary

Tablet of the Day hero card on Home, with one tablet surfaced per day and no repeats until the whole collection is used

tabletOfTheDay - picks the day's tablet from a permutation seeded by the cycle number: cycle = day / 527, position = day % 527, shuffle(ids, cycle)[position]. Walking a permutation in order means all 527 appear exactly once before any repeat, then a fresh order for the next cycle
HeroCard - 4:3 card matching the source images (all 2048x1536, so cover crops nothing), dark film over the image, "Daily Tablet" pill, title, 2-line blurb, Explore Detail -> tablet detail
plainText in parseHTML - strips tags for the blurb preview

Stateless by design - no storage, so the same tablet shows for every user, it works offline, and it survives a cleared cache. A stored-shuffle approach would give each device a different tablet and restart the cycle whenever storage is cleared
Rolls over at local midnight, derived from the local calendar date rather than raw Date.now()
Known limitation: if a curator adds a tablet the collection size changes, so both the permutation and the position shift and the day's pick can change mid-day. It stays a valid tablet. Caching the pick in MMKV would fix it, at the cost of the statelessness above
Positioning and the overlay use inline styles rather than NativeWind classes;