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/Quest/QuestGiver.cs

@@ -14,16 +14,42 @@ namespace BaseGames.Quest
     public class QuestGiver : InteractableNPC
     {
         [Header("任务")]
-        [SerializeField] private QuestSO[] _offeredQuests;   // 该 NPC 可提供的所有任务（按优先级排列）
+        [Tooltip("该 NPC 可提供的所有任务，按优先级从高到低排列。\n" +
+                 "交互时从列表头部找到第一个 Available 或 Active 状态的任务作为当前任务；\n" +
+                 "若全部已完成，显示最后一个已完成任务的 completedDialogue。")]
+        [SerializeField] private QuestSO[] _offeredQuests;
 
         [Header("对话版本（根据任务状态切换）")]
-        [SerializeField] private DialogueSequenceSO _availableDialogue;   // 任务可接时
-        [SerializeField] private DialogueSequenceSO _activeDialogue;      // 任务进行中
-        [SerializeField] private DialogueSequenceSO _readyDialogue;       // 完成条件满足时
-        [SerializeField] private DialogueSequenceSO _completedDialogue;   // 任务已完成后
+        [Tooltip("任务尚未接取（QuestState.Available）时播放。通常是 NPC 发布任务、介绍背景的对话。")]
+        [SerializeField] private DialogueSequenceSO _availableDialogue;
+        [Tooltip("任务已接取、目标尚未全部完成（QuestState.Active）时播放。通常是 NPC 催促或加油打气的对话。")]
+        [SerializeField] private DialogueSequenceSO _activeDialogue;
+        [Tooltip("全部非可选目标已达成、任务可以交付时播放（IsReadyToComplete = true）。\n" +
+                 "通常是 NPC 感谢、确认收取物品的对话，播放后执行 CompleteQuest 逻辑。")]
+        [SerializeField] private DialogueSequenceSO _readyDialogue;
+        [Tooltip("任务已完成（QuestState.Completed）后再次交互时播放。通常是 NPC 闲聊或后续剧情的对话。")]
+        [SerializeField] private DialogueSequenceSO _completedDialogue;
 
         // ── InteractableNPC 覆盖 ──────────────────────────────────────────────
 
+        public override string InteractPrompt
+        {
+            get
+            {
+                var qm    = SL.GetOrDefault<IQuestManager>();
+                var quest = GetCurrentOrCompletedQuest(qm);
+                if (quest == null || qm == null) return base.InteractPrompt;
+                return qm.GetState(quest.questId) switch
+                {
+                    QuestStateEnum.Available => "接受任务",
+                    QuestStateEnum.Active    => qm.IsReadyToComplete(quest.questId) ? "提交任务" : "进行中…",
+                    QuestStateEnum.Paused    => "暂停中…",
+                    QuestStateEnum.Completed => "对话",
+                    _                        => base.InteractPrompt,
+                };
+            }
+        }
+
         protected override void Interact_Internal(Transform player)
         {
             var qm    = SL.GetOrDefault<IQuestManager>();
@@ -57,6 +83,7 @@ namespace BaseGames.Quest
                 QuestStateEnum.Available => _availableDialogue,
                 QuestStateEnum.Active    => qm.IsReadyToComplete(quest.questId)
                                                ? _readyDialogue : _activeDialogue,
+                QuestStateEnum.Paused    => _activeDialogue,   // 暂停中显示"催促"对话，不触发任何状态推进
                 QuestStateEnum.Completed => _completedDialogue,
                 _                        => base.GetCurrentDialogue(),
             };
@@ -79,7 +106,7 @@ namespace BaseGames.Quest
             {
                 if (q == null) continue;
                 var s = qm.GetState(q.questId);
-                if (s == QuestStateEnum.Available || s == QuestStateEnum.Active) return q;
+                if (s == QuestStateEnum.Available || s == QuestStateEnum.Active || s == QuestStateEnum.Paused) return q;
                 if (s == QuestStateEnum.Completed) lastCompleted = q;
             }
             return lastCompleted;