feat: Enhance scene transition management and HUD scaffolding

- Added RequestTransition method to ISceneService for direct scene transition requests without needing Inspector SO references.
- Updated DoorTransition and RoomTransition to utilize the new RequestTransition method via ServiceLocator.
- Introduced SceneFadeController to manage scene fade effects during transitions, with event channel integration for fade requests.
- Created HUDScaffoldWizard to automate HUD Canvas setup, including various UI elements and event channel bindings.
- Updated assembly definitions to include necessary dependencies for new UI components.
- Added Streaming assets for budget configuration to optimize scene loading and memory management.

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

@@ -168,8 +168,19 @@ namespace BaseGames.Editor
             AssignAsset(loadingMgr, "_onLoadingProgressUpdated", report, false, "EVT_LoadingProgressUpdated");
             loadingCanvasGo.SetActive(false);
 
+            // ── SceneFadeController（场景切换黑幕）───────────────────────────
+            // 纯逻辑节点：监听淡出/淡入事件后调用 SceneFeedback.Play()。
+            // 实际 UI 效果完全由 SceneFeedback 内部的 MMF_Player 负责。
+            GameObject fadeCtrGo = GetOrCreateChild(ui.transform, "SYS_SceneFade").gameObject;
+            SceneFadeController fadeCtr = GetOrAddComponent<SceneFadeController>(fadeCtrGo);
+            AssignAsset(fadeCtr, "_onFadeOutRequest", report, false, "EVT_FadeOutRequest");
+            AssignAsset(fadeCtr, "_onFadeInRequest",  report, false, "EVT_FadeInRequest");
+
             report.Add("Canvas_Splash：请将工作室 Logo CanvasGroup 赋给 _studioLogoGroup，游戏标题 CanvasGroup 赋给 _gameTitleGroup。");
             report.Add("Canvas_Loading：请为 LoadingScreenManager 绑定 _progressBar（Slider）和 _loadingPanel（GameObject）。");
+            report.Add("SYS_SceneFade：请创建两个带 MMF_Player 的 SceneFeedback（淡出/淡入），" +
+                       "配置完毕后分别拖入 SceneFadeController._fadeOut / _fadeIn。" +
+                       "MMF_Player 总时长应 ≤ SceneService._sceneFadeDuration（默认 0.4 s）。");
 
             EnsureAudioSources(audioManagerGo, audioManager, report);