Featured rotation -> day-slot booking: 10 slots/day, pick your start day, live occupancy

- Per-day occupancy shown in composer (Today 1/10, Tomorrow 2/10, …), full days unpickable
- Book a specific start day + duration; every covered day must have an open slot
- Slot cap turns dilution disclosure into a hard ceiling; featured skips frame-check (new-tab)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

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 <title>Viewing ad — InstantAdPay</title>
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