Three loading-state divs were missing the role/aria pattern that
TemplatePalette.tsx and EmptyState.tsx already follow. Screen readers
get no signal that the page is waiting:
- canvas/src/app/page.tsx — full-screen "Loading canvas..." while
the websocket hydrates. First paint of the entire app.
- canvas/src/components/settings/TokensTab.tsx — "Loading tokens..."
- canvas/src/components/settings/OrgTokensTab.tsx — "Loading keys..."
Add role="status" + aria-live="polite" to the wrapping div so
assistive tech announces the wait and the eventual transition.
Visual rendering unchanged.
e2328abedc