feat: Round 51 narrative systems improvements

- SaveData: update QuestState.Status comment to include Paused state
- QuestManager: add inline comment on AcceptQuest duplicate-accept guard
- QuestManager: wrap reward.Apply() in try-catch so exceptions don't
  corrupt already-committed Completed state
- QuestManager.UnlockBranches: support new conditionFlagEntries (invert/
  NOT logic) with graceful fallback to legacy conditionFlags
- QuestGiver: cache IQuestManager field in OnEnable; subscribe to
  OnQuestStateChanged for automatic cache invalidation instead of manual
  _cacheDirty = true after each Interact; remove per-call SL.GetOrDefault
- QuestGiver: replace hardcoded Chinese prompt strings with
  LocalizationManager.Get(key, 'UI') + inline fallback via GetPrompt()
- QuestSO: add BranchFlagEntry struct (flagId + invert) for NOT-logic
  branch conditions; add conditionFlagEntries to QuestBranch with
  HideInInspector on legacy conditionFlags for backward compat
- QuestModule: add static TTL cache (5 s) for FindAll<QuestSO>() in
  PopulateDependencyGraph to avoid re-scanning disk on every foldout open
- NpcSOEditor: add 'jump to localization file' button that pings and
  selects the UI table JSON in the Project window

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

Assets/_Game/Scripts/Quest/QuestSO.cs

@@ -310,12 +310,14 @@ namespace BaseGames.Quest
         [Tooltip("条件任务：该任务已 Completed 时走本分支（留空 = 默认分支，总是满足）。")]
         public QuestSO            conditionQuest;
         [Tooltip("世界状态标志条件判断逻辑：\n" +
-                 "  And（默认）= 全部 conditionFlags 均满足才走本分支\n" +
-                 "  Or         = 任意一个 conditionFlag 满足即可走本分支")]
+                 "  And（默认）= 全部 conditionFlagEntries 均满足才走本分支\n" +
+                 "  Or         = 任意一个 conditionFlagEntry 满足即可走本分支")]
         public BaseGames.Core.WorldStateFlagLogic conditionFlagsLogic = BaseGames.Core.WorldStateFlagLogic.And;
-        [Tooltip("世界状态标志条件（可选）。按 conditionFlagsLogic 逻辑与 conditionQuest 共同决定分支是否激活。\n" +
-                 "标志由 ISaveService.GetFlag(flagId) 查询，通常由 SetFlagAction 或其他系统写入。")]
-        [WorldStateFlag]
+        [Tooltip("世界状态标志条件（支持 invert 取反）。按 conditionFlagsLogic 逻辑与 conditionQuest 共同决定分支是否激活。\n" +
+                 "优先使用此字段；若为空则自动回退到旧版 conditionFlags 以保证兼容性。")]
+        public BranchFlagEntry[]  conditionFlagEntries;
+        [Tooltip("（旧版兼容字段，已被 conditionFlagEntries 取代。如 conditionFlagEntries 不为空则本字段被忽略。）")]
+        [HideInInspector]
         public string[]           conditionFlags;
         [Tooltip("本分支解锁的后续任务。满足所有条件后，此任务将被设为 Available。")]
         public QuestSO            nextQuest;
@@ -327,6 +329,19 @@ namespace BaseGames.Quest
         public string npcDialogueKey;
     }
 
+    /// <summary>
+    /// 任务分支中单个世界状态标志条件，支持取反（NOT）逻辑。
+    /// </summary>
+    [Serializable]
+    public struct BranchFlagEntry
+    {
+        [Tooltip("世界状态标志 ID（由 ISaveService.GetFlag 查询）。")]
+        [BaseGames.Core.WorldStateFlag]
+        public string flagId;
+        [Tooltip("若勾选，则该标志为 false 时才满足条件（NOT 取反逻辑）。")]
+        public bool   invert;
+    }
+
     /// <summary>任务分类，供日志 UI 分区和 DataHub 过滤使用。</summary>
     public enum QuestCategory
     {