Core/Unit: remove emote state when creature attacks another unit (#17542)

src/server/game/Entities/Unit/Unit.cpp

@@ -8584,6 +8584,9 @@ bool Unit::Attack(Unit* victim, bool meleeAttack)
 
         ToCreature()->SendAIReaction(AI_REACTION_HOSTILE);
         ToCreature()->CallAssistance();
+
+        // Remove emote state - will be restored on creature reset
+        SetUInt32Value(UNIT_NPC_EMOTESTATE, EMOTE_ONESHOT_NONE);
     }
 
     // delay offhand weapon attack to next attack time