v0.10.0-alpha.2

High-refresh presentation now matches stable sprite pieces across object
appearance, removal and animation changes. Camera and stable actors can continue
interpolating while new or discontinuous pieces retain their completed positions.
Player teleports and source changes retain the completed-picture fallback.

Knuckles' imported life icon now draws consistently in ordinary and interpolated
pictures. Airborne Knuckles keeps the active glide or fall pose through widescreen
goal runoff. Aquatic Ruin's animated water surface repeats across the wide view.

Includes the optional Clone Driver + Mega PCM audio mod and the 1.5-second
quick-load hold introduced in alpha.1. Quick save fires on press. Native saves
and saved launcher settings are preserved when updating.

Validation passed 15 focused tests, both quick-load hold tests, 46 stock/alternate-driver quickstate fixtures, warm and cold state continuation, rollback, rewind and diagnostic replay. The shipping build matched 110 goal-route RAM samples against alpha.1. A matched 144 Hz route rendered 536/720 attempted fractional frames, compared with 254/680 in alpha.1, with identical final game RAM and ordinary image. This measures fractional-frame eligibility under the 3% background limit. CPU-time comparisons remained inconclusive across 24 matched samples.