fix: restore Askr typography and navbar alignment

[smiggleworth]

Summary

• restore the existing Askr Domine heading font at the shared site-shell boundary
• align the docs search control with the desktop navbar and use the shared outline button treatment
• place the docs channel in the same Container size="xl" boundary as the header and marketing content
• port the Cntryl search fixes for delegated input targets, stable dialog rendering, and lifecycle-managed shortcuts
• update all outdated direct Askr packages (askr 0.0.70, themes 0.0.16, testing 0.0.2) and regenerate versioned API docs

Verification

• npm run check
  • formatting, lint, typecheck, and docs drift checks passed
  • 12 unit tests passed
  • production SSG generated 338/338 routes
  • static verification passed for 338 routes and 32,442 API anchors
• npm outdated --json reports no outdated direct @askrjs/* packages
• generated docs markup gives the header and docs channel the same themed container layout class
• restarted dev server returns HTTP 200 for /docs/ using the updated lockfile
• no runtime errors appeared after the search fix hot reloaded

The browser connector is unavailable in this session, so interactive visual confirmation is being performed against the live local dev server.

Closes #15

[Copilot]

Pull request overview

Restores Askr’s typography and improves docs navbar search alignment/behavior to match the shared site-shell styling and avoid client-side search rendering errors.

Changes:

• Applies the existing Domine Variable heading font token at the shared .site-shell boundary and centralizes the docs secondary text token.
• Aligns the docs search control with the desktop navbar by removing sidebar spacing and ensuring truncation works in a flex layout.
• Normalizes potentially-unset search query state to avoid .trim() throwing, and switches the trigger to the shared outline Button.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/styles.css	Moves shared typography tokens to .site-shell, removes navbar search margin, and adjusts search trigger layout/truncation styles.
src/pages/docs/search.tsx	Updates the search trigger to use themed Button and guards query rendering/searching against undefined.

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