fix: auto-recover from stale-bundle chunk errors; responsive touch-ups

- The "This page couldn't load" after a redeploy was a stale bundle: a tab open
  across a deploy requests JS chunks that no longer exist (ChunkLoadError). Added
  a global error/unhandledrejection guard that reloads once to fetch the fresh
  bundle (sessionStorage-guarded against loops, cleared after a healthy run).
- Reaction tray width → w-[min(270px,86vw)] so it never overflows narrow phones.

Verified: tsc + next build pass; web image rebuilt on :1500.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/components/GameTable.tsx

@@ -822,7 +822,7 @@ function Reactions() {
             initial={{ opacity: 0, y: 12, scale: 0.95 }}
             animate={{ opacity: 1, y: 0, scale: 1 }}
             exit={{ opacity: 0, y: 12, scale: 0.95 }}
-            className="absolute bottom-20 ltr:right-4 rtl:left-4 z-50 glass rounded-2xl p-2 w-[270px]"
+            className="absolute bottom-20 ltr:right-4 rtl:left-4 z-50 glass rounded-2xl p-2 w-[min(270px,86vw)]"
           >
             <div className="flex gap-1 p-1 rounded-xl bg-navy-900/70 mb-2">
               <button