The blit cost remembered only the last buffer a decoder wrote into, forever.
Move the texture cache's video list (with its ageing out a few flips after
the last write) into GPUCommon, so the texture cache, the blit cost and
SoftGPU all share one. That also counts both of a double-buffered player's
frames, which exposed that a clear drawn with texturing still enabled was
being charged as a blit - skip clears and draws without texture coordinates.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>