Remove stale references to .rules/CLAUDE.md exclusions from ESLint, Prettier, and cspell now that those files are tracked. Drop unused cspell words (Ambilab, atlases, framebuffer, texcoord, webstorm). Add .markdownlint.json with MD013 line-length config. Update .gitignore to track CLAUDE.md/.claude, ignore .zed//.cursor/IDE dirs and .claude/settings.local.json. Simplify pre-push hook to typecheck+lint only with numbered step output. Clean up lint-staged flags and add explicit biome format step. Trim Zed settings to editor essentials. Signed-off-by: Vaclav Vancura <commit@vancura.dev>