feat: Round 50 narrative systems improvements

IQuestManager+QuestManager: add FillQuestsInState/FillFilterQuests buffer overloads (no-alloc hot path); remove R49 duplicate implementations.

QuestGiver: cache current quest result (_cachedQuest/_cachedState/_cacheDirty) to avoid per-frame foreach in InteractPrompt; invalidate on OnEnable and Interact_Internal state changes.

IDialogueService+DialogueManager: add StartDialogue(..., Action onComplete) overload; callback fires once on ForceEnd (covers both normal end and interrupt); supports chained callbacks via += accumulation.

DialogueVariantPreviewWindow: add 'Copy CSV' button in matrix section; exports all 2^N flag combinations with winner column; handles N>10 guard and CSV-safe escaping.

WorldStateRegistry: add TryGetCategory(id, out category) reverse lookup for debug tools.

NpcSOEditor: new CustomEditor for NpcSO showing live nameKey localization preview in Inspector (green label or warning box if Key not found).

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

Assets/_Game/Scripts/Dialogue/IDialogueService.cs

@@ -23,6 +23,14 @@ namespace BaseGames.Dialogue
         /// <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>
+        /// 启动对话序列，并在本次对话（含所有排队续播）全部结束时回调 <paramref name="onComplete"/>。
+        /// 若 <paramref name="onComplete"/> 为 null，行为与 <see cref="StartDialogue(DialogueSequenceSO,string,int)"/> 完全相同。
+        /// 回调仅触发一次；若对话被 <see cref="ForceEnd"/> 打断，回调同样会被调用（在 ForceEnd 末尾）。
+        /// 适用场景：EventChain 触发对话后等待完成再执行下一动作、CutsceneModule 同步对话与演出。
+        /// </summary>
+        void StartDialogue(DialogueSequenceSO sequence, string npcId, int priority, System.Action onComplete);
+
         /// <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。