Rev 19: breaching the rim opens a new warp across the maze

Destroying a wall on the board's outer edge used to leave a one-sided
hole into nothing. The table's physics prevail: the outer rim wraps,
so the breach goes clean through — the opposite perimeter wall in the
same row or column crumbles too (collapse damage and all), and a new
warp pair opens between the two edges, shimmering at both mouths.
Rev-gated: stored games hold one-sided breaches and replay so. Sector
moves recompute the wraparounds and forget improvised openings, as
the maze's own reshaping always has.

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

packages/web/src/fx.ts

@@ -208,6 +208,11 @@ export function fxForEvents(
         push({ kind: "portal-cell", at: e.to }, 150);
         beat++;
         break;
+      case "warpOpened":
+        push({ kind: "portal", cell: e.a.cell, side: e.a.side });
+        push({ kind: "portal", cell: e.b.cell, side: e.b.side }, 200);
+        beat++;
+        break;
       case "wallCreated":
       case "wallDestroyed":
         push({ kind: "edge-dust", cell: e.edge.cell, side: e.edge.side });