Accessibility (CRITIQUE per UI/UX Pro Max skill):
- NetworkGraph Accessibility Grade D → added accessible List view alternative
(toggle Graph/List with cluster→notes table, keyboard navigable)
- aria-label text summary on graph container for screen readers
- role=button + tabIndex + onKeyDown on bridge note cards (keyboard accessible)
- focus-visible:ring on all interactive cards (isolated clusters, bridges, list items)
UX (HIGH):
- prefers-reduced-motion: whileHover disabled when user prefers reduced motion
- cursor-pointer verified + focus-visible:ring-ochre on all clickable cards
- Mobile sidebar: hamburger Menu button in header (dispatches open-mobile-sidebar)
Performance (MEDIUM):
- NetworkGraph lazy-loaded via next/dynamic (D3 ~200KB deferred, ssr:false)
- Loading spinner shown while D3 chunk loads
i18n:
- listView, graphAriaLabel, listAriaLabel added to 15 locales
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