fix(Core/SmartAI): Fix Scarlet Monastery Cathedral encounter reset (#25362)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

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

@@ -697,6 +697,20 @@ void SmartAI::MovementInform(uint32 MovementType, uint32 Data)
         MovepointReached(Data);
 }
 
+void SmartAI::JustExitedCombat()
+{
+    // When evade is suppressed or disabled, don't auto-evade on combat exit.
+    // This prevents scripted encounters (e.g. Mograine/Whitemane) from resetting
+    // when bosses temporarily stop fighting during scripted phases.
+    if (mSuppressEvade || mEvadeDisabled)
+    {
+        EngagementOver();
+        return;
+    }
+
+    CreatureAI::JustExitedCombat();
+}
+
 void SmartAI::EnterEvadeMode(EvadeReason /*why*/)
 {
     if (mSuppressEvade)

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

@@ -85,6 +85,9 @@ public:
     // Called for reaction at enter to combat if not in combat yet (enemy can be nullptr)
     void JustEngagedWith(Unit* enemy) override;
 
+    // Called when creature exits combat (all combat refs gone)
+    void JustExitedCombat() override;
+
     // Called for reaction at stopping attack at no attackers or targets
     void EnterEvadeMode(EvadeReason why = EVADE_REASON_OTHER) override;