feat: Round 48 narrative systems improvements

- QuestSO: Add ValidateBranchCycles() DFS detection for branches[].nextQuest loop
- QuestSO: Mark three legacy prerequisite fields with v2.0 removal warning in Tooltip
- IQuestManager: Add QuestLockReason enum + QuestLockInfo struct (strongly-typed lock info)
- IQuestManager: Add GetQuestLockInfo() method to interface; GetQuestLockReason() now delegates to it
- IQuestEventSource: Add OnQuestStateChanged(questId, oldState, newState) unified event
- QuestManager: Implement GetQuestLockInfo(); fire OnQuestStateChanged on all state transitions
- DialogueManager: Add one-frame yield in HandleChoices before ShowChoices (skip-debounce fix)
- DialogueManager: Increment _playbackId in ForceEnd() to invalidate residual choice callbacks
- DialogueSequenceSO: Add UNITY_EDITOR debug log in TryGetActiveVariant on variant match
- WorldStateRegistry: Add OnBatchStateChanged event + BatchMark() batch-write API
- DialogueModule: List badge shows warning indicator for unconditional-shadowing variants
- DialogueModule: BuildVariantsCard shows logic mode (AND/OR) alongside flag conditions

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

Assets/_Game/Scripts/Dialogue/IDialogueService.cs

@@ -9,10 +9,25 @@ namespace BaseGames.Dialogue
         bool IsDialogueActive { get; }
 
         /// <summary>
-        /// 启动对话序列。若已有对话在播放则忽略新请求。
+        /// 每次对话序列（含分支链）全部播完后触发。
+        /// 测试代码可订阅此事件等待对话结束，无需依赖 VoidEventChannelSO 资产。
+        /// </summary>
+        event System.Action OnDialogueEnded;
+
+        /// <summary>
+        /// 启动对话序列。
+        /// 若已有对话在播放：priority 高于当前对话时立即打断；否则进入队列（上限 8），超出丢弃。
         /// </summary>
         /// <param name="sequence">要播放的对话序列 SO。</param>
         /// <param name="npcId">NPC 标识符，对话结束时随 EVT_NpcDialogueCompleted 广播。</param>
-        void StartDialogue(DialogueSequenceSO sequence, string npcId = "");
+        /// <param name="priority">优先级（默认 0）。数值越大越优先；高优先级可打断低优先级对话。</param>
+        void StartDialogue(DialogueSequenceSO sequence, string npcId = "", int priority = 0);
+
+        /// <summary>
+        /// 立即强制结束当前对话（含清空等待队列），恢复游戏输入。
+        /// 适用于：场景切换、演出系统打断、死亡/传送等需要硬中断的场合。
+        /// 若当前没有活跃对话，则无操作。
+        /// </summary>
+        void ForceEnd();
     }
 }