Give the run strip a panel, round the rack, fix the duel's hint

The NEXT/GAME row was bare text on the court. That was legible over one dark
green lawn and is not over a sunlit clay crowd or a floodlit blue one, so it
gets its own rounded panel — the same thing the scoreboard art above it already
relies on. It states the sets banked now too; they had only ever appeared in the
scoreboard's own per-row column.

The weapon rack's five slots are rounded, which is what they are: buttons.

The duel is played under tennis rules — no slingshot, no rack, serve to the box
(see the !G.interlude guards in solveShot and the aim reticle) — but the bottom
hint was still telling you to pull back to aim, which is the one thing that does
nothing there. It reads as a tennis serve now.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

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+<script type="module" src="main.js?v=90"></script>
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