v1.0.0-rc.3 — Calibration export fix

Fixed

• Calibration export was dropping today's row. The 30-day window in _generateCalibExport() ran from today-30 to today-1, silently excluding today even though today's seeded *_actual scores are typically what the user just paste-confirmed via the dev console snippet. The data was being fetched (the API call's to= param uses today) but never iterated during day-row construction. Window shifted to today-29 → today inclusive — same 30-day length, ends today instead of yesterday.

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