Unify the header and polish directory, docs, and home pages

- Use the /libraries header size on every route, through shared CSS variables.
- Keep a solid, static header on every route except the home page.
- Give /libraries its own full-height shell with a scrolling results pane.
- Show website previews and a category label on library grid cards.
- Pin the docs sidebar and remove the right-hand docs rail.
- Size contributor portraits by contribution count.
- Show the roadmap as a timeline.
- Replace the hero shader, floating logos, and effect buttons with standard buttons.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
563c4c546fScreen committed on 9/28/2026, 7:50:33 PMparent268472c
17 files changedLine totals unavailable