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/World/WorldStateRegistry.cs

@@ -153,5 +153,22 @@ namespace BaseGames.World
 
         /// <summary>重置所有状态（开始新游戏时调用）。</summary>
         public void Reset() => _states.Clear();
+
+        /// <summary>
+        /// 反向查询：在所有分类中查找 <paramref name="id"/> 首次出现的类别。
+        /// 适用于调试工具（如 DataHub / WorldState 检视面板）快速定位一个 id 属于哪类。
+        /// O(k) 其中 k = 分类数（最多 5）。
+        /// </summary>
+        /// <param name="id">要查找的 ID。</param>
+        /// <param name="category">找到时输出该 ID 所属的类别；未找到时输出 <see cref="WorldObjectCategory.Flag"/>（默认值）。</param>
+        /// <returns>true = 找到；false = 任何类别中均无此 id。</returns>
+        public bool TryGetCategory(string id, out WorldObjectCategory category)
+        {
+            if (!string.IsNullOrEmpty(id))
+                foreach (var (cat, set) in _states)
+                    if (set.Contains(id)) { category = cat; return true; }
+            category = default;
+            return false;
+        }
     }
 }