Clear queue and Add queue to playlist were named by a `title` attribute
and nothing else, while the close button beside them has carried an
`aria-label` since #24. They get one too.
`title` is a name, so this is the weak-name case rather than the missing
one: it is the *last* fallback in the accname order, so any content put
inside the button later silently outranks it, and a phone has no hover
to show it. The `title`s stay — on a desktop they are also the tooltip
for an icon-only control, which is a different job.
The assertion is the part worth reading. The obvious spec — `getByRole`
by name, which is what `queue-overlay.spec.ts` already does for the
close button — is **green on the broken build**: measured against the
running pre-fix app, both buttons matched. So the second test states the
property as what it is, that the name is not the tooltip: it removes the
`title` attributes and asks again, which was 0 and 0 on main and is 1
and 1 now.
Closes#170
logan