Play pair chime sound for all players including local player

firePairCelebration was only doing the visual animation but not playing
the pair sound. The sound was only played during score tallying.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/app.js

@@ -2602,6 +2602,7 @@ class GolfGame {
         const elements = this.getCardElements(playerId, pos1, pos2);
         if (elements.length < 2) return;
 
+        this.playSound('pair');
         if (window.cardAnimations) {
             window.cardAnimations.celebratePair(elements[0], elements[1]);
         }