Cmd +/- zoom scales the root <html> font-size (rem-only by design),
but PR #891 converted the message-timeline + thread render path from
rem tokens to hardcoded px (text-[15px]/text-[13px], font-size: 15px),
freezing that text against zoom.
Preserve Kenny's 15px chat sizing intent but express it in rem so it
scales: add rem-based `text-chat` (0.9375rem === 15px) and `text-code`
(0.8125rem === 13px) Tailwind tokens, and swap the px classes over in
MessageRow, markdown, mentionChip, and globals.css (.mention-highlight).
Codify it: add `pnpm check:px-text` CI guard flagging new px text in the
timeline/thread render path, wired into `pnpm check`, plus an AGENTS.md
note steering future agents to rem tokens. Scoped to the regression
footprint — no app-wide sweep.
Co-authored-by: Taylor Ho <taylorkmho@gmail.com>
Signed-off-by: Taylor Ho <taylorkmho@gmail.com>
## Summary
- Activate lefthook pre-commit and pre-push hooks that have existed in `lefthook.yml` since the initial desktop app but were never wired up.
- Add `just hooks` recipe: sets `core.hooksPath = .hooks` and runs `lefthook install --force` to generate hook scripts.
- Wire hook installation into `scripts/dev-setup.sh` so hooks activate automatically on `just setup`.
- Enable `parallel: true` for pre-commit hooks (pre-push already had it) — all 5 format/lint checks run simultaneously.
- Add `just mobile-fmt` recipe (`dart format .`) and `just fmt-all` recipe (Rust root + Tauri Rust + Dart) as one-shot formatters.
- `.hooks/` is gitignored since lefthook generates machine-specific scripts.
- Update `AGENTS.md`: document pre-commit/pre-push hooks in Quality Gates, add `just fmt-all` and `just hooks` usage, upgrade worktree fmt gotcha from CI note to commit blocker, add `just mobile-fmt` to mobile commands; also backfill CLI-first updates (`SPROUT_AUTH_TAG`, complete exit codes, `--format compact` flag position, two new gotchas).
All hook commands delegate to `just` recipes as the single source of truth.
