Add integration tests for App.tsx with accessible HP status labels

3 integration tests render the full <App /> and exercise multi-component
flows: add/remove combatant, turn tracking across two combatants, and
HP adjustment with unconscious state. Add aria-label to the clickable HP
button so tests query accessible names instead of CSS classes.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/src/components/combatant-row.tsx

@@ -244,6 +244,7 @@ function ClickableHp({
 			<button
 				type="button"
 				onClick={() => setPopoverOpen(true)}
+				aria-label={`Current HP: ${currentHp} (${status})`}
 				className={cn(
 					"inline-block h-7 min-w-[3ch] text-center font-medium text-sm tabular-nums leading-7 transition-colors hover:text-hover-neutral",
 					status === "bloodied" && "text-amber-400",