Single-word filter was too loose: "Echoes of Eternity" produced only
"Eternity" which matched unrelated tracks. Now the top 2 longest words
are used so the filter becomes e.g.
title ~= (?i)Eternity & title ~= (?i)Echoes?
title ~= (?i)Amethyst & title ~= (?i)Flowers?
Both words must appear — drastically reduces false matches.
Trailing-s stays optional (Whispers? matches Whisper/Whispers).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>