v0.9.15

Knuckles now uses the original half-pipe sprite artwork, palette and solo result layouts. Sonic, Tails and Knuckles solo rosters select their native special-stage controller.

Validated native and widescreen rendering, emerald awards and return to gameplay, current-build save/load, rewind, replay, rollback, packaged launcher settings and runtime parity.

QA credit: TheGabeMaster29.