- output_style: use MAGENTA color per PRD (was incorrectly DIM)
- vcs: pass project dir to jj exec (was None, causing wrong cwd)
- tools: singular "tool" when count is 1 (was always "tools")
- layout: wire up apply_formatting() in render pipeline (prefix,
suffix, color override, pad, align were completely dead code)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>