feat(models): add keyboard navigation and shortcuts

[ded-furby]

Summary

• Add page-level keyboard shortcuts on the Models page to improve table navigation:
  • / focuses the search input without scrolling
  • J/K move through table rows
  • Enter opens the currently selected model detail
  • ? toggles a shortcut cheatsheet
  • Escape clears the search term or closes the shortcut modal
• Add selected-row highlighting in the table and expose selected index updates from mouse hover.
• Add a model table link-safe click flow so row navigation is keyboard-friendly.
• Add a global placeholder hint to search input (Search models... /) and a new ShortcutHints component with a fixed ? launcher.

Files changed

• src/app/models/page.tsx
• src/components/models/ModelFilters.tsx
• src/components/models/ModelTable.tsx
• src/components/models/ShortcutHints.tsx

Validation

• npm run lint (passes with existing unrelated image warnings in src/app/contributors/page.tsx)
• npx tsc --noEmit

Closes #100

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Project	Deployment	Actions	Updated (UTC)
ai-atlas	Ready	Preview, Comment	Jun 7, 2026 6:11pm