fix: Round 55 递归硬中止、存档加载缓存刷新、好感度空值防护、选项穿透延迟、分支对话去重

- QuestSO.HasPrerequisiteCycle/HasBranchCycle: depth>32 改为 LogError+return true 硬中止，防止栈溢出
- DialogueSequenceSO.HasChoiceCycle: 新增 depth 参数及 >32 硬中止，同时更新递归调用传 depth+1
- IQuestEventSource: 新增 OnAfterSaveLoaded 事件接口，供存档加载后统一刷新缓存
- QuestManager.OnLoad: 末尾触发 OnAfterSaveLoaded，确保所有缓存组件收到通知
- QuestGiver: 订阅 OnAfterSaveLoaded 设 _cacheDirty，存档恢复后 NPC 交互提示始终最新
- QuestManager.ApplyAffinity: 新增 giverNpc null 显式 LogWarning、maxAffinity<0 LogError 防护
- DialogueManager: 选项穿透防护改为预创建 WaitForSeconds(0.15f)，替代 yield return null
- QuestManager.UnlockBranches: 多分支同时满足时只播首个有对话的分支，防止重复播放

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Assets/_Game/Scripts/Dialogue/DialogueSequenceSO.cs

@@ -286,8 +286,13 @@ namespace BaseGames.Dialogue
         }
 
         private static bool HasChoiceCycle(DialogueSequenceSO seq,
-            System.Collections.Generic.HashSet<string> visited)
+            System.Collections.Generic.HashSet<string> visited, int depth = 0)
         {
+            if (depth > 32)
+            {
+                Debug.LogError($"[DialogueSequenceSO] 选项链深度超过 32 层（路径末端：'{seq.name}'），已视为存在循环引用并中止检测。请减少 nextSequence 嵌套层数。");
+                return true;
+            }
             if (string.IsNullOrEmpty(seq.sequenceId)) return false;
             if (!visited.Add(seq.sequenceId)) return true;
             if (seq.lines != null)
@@ -297,7 +302,7 @@ namespace BaseGames.Dialogue
                     if (line.choices == null) continue;
                     foreach (var choice in line.choices)
                     {
-                        if (choice.nextSequence != null && HasChoiceCycle(choice.nextSequence, visited))
+                        if (choice.nextSequence != null && HasChoiceCycle(choice.nextSequence, visited, depth + 1))
                             return true;
                     }
                 }
@@ -307,7 +312,7 @@ namespace BaseGames.Dialogue
             {
                 foreach (var variant in seq.variants)
                 {
-                    if (variant.sequence != null && HasChoiceCycle(variant.sequence, visited))
+                    if (variant.sequence != null && HasChoiceCycle(variant.sequence, visited, depth + 1))
                         return true;
                 }
             }