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* #1002: equation pictures share one texture, keeping theme colours on Windows The Equation tab's gallery tiles, structure buttons and symbols were a texture each: hundreds of small textures, created as galleries opened and all freed at once when the preview cache filled. On Windows (DirectX 12) tiles then showed other textures' memory (inverted pictures, red and teal fills, damaged interface letters). They are now packed into one atlas texture written in place, the way egui keeps its glyphs; it starts over when full (at most once a frame). Tests: every equation picture composited in both themes is only the theme's greys; all pictures share one texture, none freed while browsing, none overlapping; the atlas packs rows and starts over when full. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * #1002: the theme test looks for paper anywhere, not in the corner (Windows fonts reach it) Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * #1002: equation atlas uses up to four pages and never wipes a page drawn from this frame Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> --------- Co-authored-by: Dmitrii Khlapov <19991457+dkhlapov@users.noreply.github.com> Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com> Co-authored-by: Brandon Thomas <echelon@gmail.com>