fix(Core/Script): Creatures will not interrupt channeling spells anymore on engage if the spell has attribute "Allow Actions During Channeling". (#26710)

Co-authored-by: sogladev <46423958+sogladev@users.noreply.github.com>

src/server/game/AI/SmartScripts/SmartAI.cpp

@@ -876,7 +876,14 @@ void SmartAI::JustEngagedWith(Unit* enemy)
 {
     // Xinef: Interrupt channeled spells
     if (IsAIControlled())
+    {
+        if (Spell* spell = me->GetCurrentSpell(CURRENT_CHANNELED_SPELL))
+        {
+            if (!spell->GetSpellInfo()->IsActionAllowedChannel())
                 me->InterruptSpell(CURRENT_CHANNELED_SPELL, true, true);
+        }
+    }
+
     GetScript()->ProcessEventsFor(SMART_EVENT_AGGRO, enemy);
 }
 

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

@@ -4191,6 +4191,8 @@ void Unit::SetCurrentCastedSpell(Spell* pSpell)
                 if (m_currentSpells[CURRENT_AUTOREPEAT_SPELL] &&
                         m_currentSpells[CURRENT_AUTOREPEAT_SPELL]->m_spellInfo->Id != 75)
                     InterruptSpell(CURRENT_AUTOREPEAT_SPELL);
+
+                if (!pSpell->GetSpellInfo()->IsActionAllowedChannel())
                     AddUnitState(UNIT_STATE_CASTING);
 
                 break;