Fix AI knock decisions and improve round-end animations

Fix dumb AI knocks (e.g. Maya knocking on 13 points) by adding opponent
threat checks and a hard cap of 10 to should_knock_early(). Remove dead
should_go_out_early() call whose return value was never used. Retune knock
chance tiers to be more conservative at higher projected scores.

On the client side, fix round-end reveal sequencing so the last player's
swap/discard animation plays before the reveal sequence starts, and prevent
re-renders from clobbering swap animations during reveals. Also make the
turn-pulse shake configurable via timing-config and target only cards.

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

client/timing-config.js

@@ -77,6 +77,7 @@ const TIMING = {
 
     // V3_03: Round end reveal timing
     reveal: {
+        lastPlayPause: 2500,      // Pause after last play animation before reveals
         voluntaryWindow: 2000,    // Time for players to flip their own cards
         initialPause: 250,        // Pause before auto-reveals start
         cardStagger: 50,          // Between cards in same hand
@@ -128,6 +129,13 @@ const TIMING = {
         pulseDelay: 200,        // Delay before card appears (pulse visible first)
     },
 
+    // Turn pulse (deck shake)
+    turnPulse: {
+        initialDelay: 5000,       // Delay before first shake
+        interval: 3000,           // Time between shakes
+        duration: 300,            // Shake animation duration
+    },
+
     // V3_17: Knock notification
     knock: {
         statusDuration: 2500,       // How long the knock status message persists