List it in the root README, declare its client build entries in knip, ignore the local vite-plugin-inspect reference checkout and the gstack session dir, and update the lockfile.

pnpm publint packs each package and checks its exports resolve, but the CI job ran it without building — so dist/* was missing and every package failed. Build before knip/publint, matching the check script.

Toolbar split into three distinct controls per the design handoff:
View (segmented Preview/Source/Check switch), Viewport (independent
Desktop/Mobile toggles with an inline device-size strip), and a pulled-out
Edit action.

Frame UX:
- Size device frames to the email content, capped at the device height, with
  internal scroll; short emails hug their content.
- Widen the desktop frame to 800px.
- Drop the iframe's fixed px width (use w-full) so a vertical scrollbar no
  longer forces a spurious horizontal one.

Theming:
- Align surfaces/borders/text to the design system's neutral scale, with
  distinct surface-default / surface-card levels that diverge in dark mode.
- Fix borders that never rendered: presetWind3 ships no preflight, so add a
  Tailwind-style border reset and drop the button reset's border:none.
- Defer to native OS scrollbars (macOS overlay, hover-only) so the email stays
  centered at the exact device width.