Random picks & generators

Why not Math.random()

The familiar `Math.random() % length` gives entries near the front a slight edge, because the random range rarely divides evenly by the list length — and the longer the list or the odder the die, the more visible that becomes. Every random tool here uses Web Crypto with rejection sampling instead: values landing in the tail that cannot be divided evenly are discarded and redrawn, so each entry has exactly the same chance. Standardising on one source has a second benefit: nobody later reuses the same helper to generate a password or token, where weak randomness genuinely matters.