Daniel a3a6ef7995 feat: redesign quiz runner and add study tools ...

Add Orthobullets-inspired numbered-answer UI, explicit study response confirmation, response statistics, review navigation, safe calculator, keyboard controls and sourced educator lab references. Persist attempt mode to prevent query-flag exam disclosure. Combined deployed-image backend suite (22), frontend suite (48), build and synthetic desktop/mobile browser checks pass. PostgreSQL round-trip and independent review remain release gates; no production deployment.

2026-09-07 03:10:23 +02:00

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