Senzoukria v0.9.1 release notes

Nobody wrote reviewed notes for this version. What follows is the release body as published on GitHub, unedited.

• The dashboard background, rebuilt
• The black hole was costing far more than it should have: every single frame rebuilt ~25 gradients, ran ~15 CPU blur passes and filled the whole screen five times. On many machines the dashboard crawled.
• It has been rebuilt from the ground up. Everything static is now baked once into textures; each frame merely composites them — about ten draw calls plus a hundred twinkling star sprites. A test now counts the draw calls per frame, so this class of regression cannot come back unnoticed.
• And it looks the part. The redesign leans into the Interstellar reading: a perfectly circular Einstein ring resting on the flattened accretion disk, a shadow darker than space itself, a disk built from two counter-sheared textures so the rotation reads as real motion — always brighter on the approaching side. The whole system sits tilted and slowly precesses, breathing over a ~40-second cycle instead of being bolted flat. Embers spiral along Keplerian orbits, and one in six gets swallowed.
• One more fix that came out of this: the animation speed used to depend on your monitor's refresh rate — on a 165 Hz panel everything ran almost three times too fast. Time is now measured in seconds, so the scene moves at the same pace on every screen.
• Measured at 170 fps (worst frame 8.5 ms) at 1080p during preview — against a background that previously struggled to hold 60.