Reverts d003532 and e05d90e. The wire flash returns to its original behaviour: instant-on at the provider's alpha with a smooth exponential fade (FRET_WIRE_HIT_DECAY 0.32 s), held sustains keep their wires lit while the note rings, and no flicker. The outer-pair bracket, lane-framed chords, and string-coloured gem rims are untouched.
Signed-off-by: topkoa <topkoa@gmail.com>