~anthropic/claude-sonnet-latest → B (6:4)

Side B makes a coherent, self-contained UI simplification to a real feature (thread forms), removing redundant markup and tightening labels/placeholders in a consistent way. Side A is a grab-bag of unrelated tweaks (env var renames, gitignore, textarea->input change that likely breaks multi-line query input, CSS fiddling) with less clear net benefit and a questionable regression (losing multi-line query support).