- I2/M1: demote log::info! to log::trace! in shaping hot paths (font split fallback in shaping/mod.rs lines 407, 419) (LINE_METRICS in software_pipeline.rs line 1137) C1, C2(a), C2(b), I1, M2 were already correctly implemented in the previous commit: cache store sites include -expand in offset_x/offset_y, BitmapCacheKey.edge_blur field exists and is populated, fill layer applies apply_be_blur_alpha, font_size uses .to_bits(), and glyph path flatten uses .copied()