refactor(ui): 重命名 Layer619_BackOtherGame → Layer619_BackHall

Layer00619 真实名为 BackHall_Layer（返回大厅），映射表此前误标为 BackOtherGame。
通过 duplicate_prefab 复制并自动同步根节点名，删旧文件。spriteFrame 引用完整（0 missing）。

Co-Authored-By: Claude Code <noreply@anthropic.com>

cocoscreator_projects/YouleNexus/assets/framework/ui/prefabs/widgets/Layer619_BackHall.prefab

@@ -1,7 +1,7 @@
 [
   {
     "__type__": "cc.Prefab",
-    "_name": "Layer619_BackOtherGame",
+    "_name": "Layer619_BackHall",
     "_objFlags": 0,
     "__editorExtras__": {},
     "_native": "",
@@ -13,7 +13,7 @@
   },
   {
     "__type__": "cc.Node",
-    "_name": "Layer619_BackOtherGame",
+    "_name": "Layer619_BackHall",
     "_objFlags": 0,
     "__editorExtras__": {},
     "_parent": null,

cocoscreator_projects/YouleNexus/assets/framework/ui/prefabs/widgets/Layer619_BackHall.prefab.meta

@@ -2,12 +2,12 @@
   "ver": "1.1.50",
   "importer": "prefab",
   "imported": true,
-  "uuid": "02c969a6-9d3b-433e-a649-6e32422049b8",
+  "uuid": "c30f219e-9d31-4737-b86e-844d325c24f8",
   "files": [
     ".json"
   ],
   "subMetas": {},
   "userData": {
-    "syncNodeName": "Layer619_BackOtherGame"
+    "syncNodeName": "Layer619_BackHall"
   }
 }