feat(ui): always display Recreate Layout button to allow map terrain regeneration

frontend/src/components/Header.tsx

@@ -118,14 +118,13 @@ export const Header: React.FC<HeaderProps> = ({
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         </a>
 
-        {playerCount > 0 && (
-          <button
-            onClick={onResetBoard}
-            className="text-xs font-medium text-slate-400 hover:text-red-400 transition-colors px-3 py-1.5 rounded-lg border border-slate-800 hover:border-red-900/60 bg-slate-950/40"
-          >
-            Clear Board
-          </button>
-        )}
+        <button
+          onClick={onResetBoard}
+          className="text-xs font-medium text-slate-400 hover:text-red-400 transition-colors px-3 py-1.5 rounded-lg border border-slate-800 hover:border-red-900/60 bg-slate-950/40"
+          title="Regenerate map terrain and clear all players"
+        >
+          Recreate Layout
+        </button>
 
         <button
           onClick={onQuickSpawn}