Fix combat loop: blacklist entities for 30s after engagement

The core problem: attacks don't deal damage (protocol issue), so
mobs never die. entityGone fires spuriously, combat "ends", then
the 2-second scan finds the same mob and re-engages endlessly.

Fix: after combat ends for ANY reason, the entity ID is blacklisted
for 30 seconds. The scan loop skips blacklisted entities. This
prevents the infinite re-engage loop.

The underlying damage issue still needs investigation, but at least
Doug won't get stuck in an endless combat loop anymore.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

bridge/src/index.js

@@ -262,6 +262,8 @@ let combatActive = false;
 let combatTargetId = null;
 let combatInterval = null;
 let lastEquipCheck = 0;
+const combatBlacklist = new Map(); // entityId → timestamp (don't re-engage)
+const COMBAT_BLACKLIST_DURATION = 30000; // 30 seconds
 
 function startCombat(target) {
   if (combatActive) return;
@@ -321,7 +323,11 @@ function endCombat(reason) {
   if (combatInterval) clearInterval(combatInterval);
   combatInterval = null;
   combatActive = false;
-  log('client', 'INFO', `⚔ Combat ended: ${reason}`);
+  // Blacklist this entity so we don't re-engage immediately
+  if (combatTargetId != null) {
+    combatBlacklist.set(combatTargetId, Date.now());
+  }
+  log('client', 'INFO', `Combat ended: ${reason} (blacklisted for 30s)`);
   sendEvent('combat_ended', { reason });
   combatTargetId = null;
 }
@@ -330,6 +336,12 @@ function endCombat(reason) {
 setInterval(() => {
   if (!spawned || combatActive) return;
 
+  // Clean expired blacklist entries
+  const now = Date.now();
+  for (const [id, time] of combatBlacklist) {
+    if (now - time > COMBAT_BLACKLIST_DURATION) combatBlacklist.delete(id);
+  }
+
   const pos = bot.entity.position;
   let closestHostile = null;
   let closestDist = 8; // Aggro range
@@ -337,6 +349,8 @@ setInterval(() => {
   for (const entity of Object.values(bot.entities)) {
     if (entity === bot.entity || !entity.position) continue;
     if (!isHostile(entity)) continue;
+    // Skip blacklisted entities (already fought, didn't die)
+    if (combatBlacklist.has(entity.id)) continue;
     const dist = entity.position.distanceTo(pos);
     if (dist < closestDist) {
       closestDist = dist;