Fix draw-swap animation race and smarter CPU go-out decisions

Increase post_draw_settle timing (1.1s→1.3s) and swap retry delay
(100ms→350ms) to prevent draw animation from being cut short by the
arriving swap animation. Also make CPU go-out decisions consider
opponent scores and avoid swapping high cards (8+) into hidden slots.

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

client/card-animations.js

@@ -1127,7 +1127,7 @@ class CardAnimations {
                 });
                 // Now run the swap animation
                 this._runUnifiedSwap(handCardData, heldCardData, handRect, heldRect, discardRect, T, rotation, wasHandFaceDown, onComplete);
-            }, 100);
+            }, 350);
             return;
         }