Swapping homes stops announcing a body swap

SWAP HOME BASES traded homes correctly but borrowed the
positionsSwapped event, so the chronicle claimed the wizards
themselves changed places. It now speaks its own event — "swap home
bases — the maze's loyalties shift!" — and both hearths shimmer as
their allegiance changes.

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

packages/web/src/fx.ts

@@ -177,6 +177,11 @@ export function fxForEvents(
         }
         break;
       }
+      case "homeBasesSwapped":
+        push({ kind: "shimmer", at: e.aHome });
+        push({ kind: "shimmer", at: e.bHome }, 200);
+        beat++;
+        break;
       case "teleported":
         push({ kind: "shimmer", at: e.from });
         push({ kind: "shimmer", at: e.to }, 200);