"Explore page" a11y

[oeb25]

Closes #94.

We still need to the following:

• [ ] Handle cancellation.
• [ ] Perhaps disable input while validating?
  • This might be a good idea, since we clear the input when validation succeeds, which would perhaps clear the users new input, which we don't like.
• [x] Rebase on main when #105 merges.
• [ ] Remove artificial delay, useful for debugging.