feat: Addressables rules/sync tools, UI fixes, AddressKeys update

- Add AddressableRules.cs: single source of truth for prefix->group and prefix->label rules
- Add AddressableRuleSyncWindow.cs: scan/fix/export-CSV tool (BaseGames > Addressables > Rule Sync)
- AddressableBatchTool.cs: delegate DeriveGroupName to AddressableRules, remove duplicate PrefixGroupMap
- AddressKeys.cs: add Labels constants (Preload, Poolable, Enemy, BGM, SFX, Charms, Config, Weapon)
- Docs/Standards/AddressablesLabelSpec.md: new label naming & assignment spec
- Docs/Standards/AssetFolderSpec.md: update Addressables group strategy section
- SplashScreenController.cs: fix MainMenu loading flow
- BootFlowSetupWizard.cs / SceneScaffoldTools.cs: scene scaffold fixes
- PlayerInputActions: set UI/Point to Pass-Through type
- Persistent.unity: add BootSequencer to auto-load MainMenu on play
- EditorBuildSettings.asset: register scenes for build

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

Assets/_Game/Scripts/Editor/Scene/BootFlowSetupWizard.cs

@@ -7,6 +7,7 @@ using BaseGames.Core;
 using BaseGames.Core.Events;
 using BaseGames.UI;
 using BaseGames.UI.MainMenu;
+using BaseGames.UI.Menus;
 using BaseGames.UI.Splash;
 
 namespace BaseGames.Editor
@@ -27,8 +28,8 @@ namespace BaseGames.Editor
     {
         // ── 常量 ──────────────────────────────────────────────────────────────
         private const string EventRoot      = "Assets/_Game/Data/Events";
-        private const string PersistentName = "Scene_Persistent";
-        private const string MainMenuName   = "Scene_MainMenu";
+        private const string PersistentName = "Persistent";
+        private const string MainMenuName   = "MainMenu";
 
         // 启动流程所需的事件频道资产清单 (subfolder, assetName, SO type)
         private static readonly (string folder, string name, System.Type type)[] BootChannels =