refactor(ui): 简化主菜单项名称并修复文件结尾格式

将主菜单项路径从"Packages/MCP Bridge/Open Test Panel"简化为"MCP Bridge/Open Panel"，同时修复文件结尾缺少换行符的问题

package.json

@@ -6,7 +6,7 @@
 	"main": "main.js",
 	"scene-script": "scene-script.js",
 	"main-menu": {
-		"Packages/MCP Bridge/Open Test Panel": {
+		"MCP Bridge/Open Panel": {
 			"message": "mcp-bridge:open-test-panel"
 		}
 	},
@@ -23,4 +23,4 @@
 			"last-port": 3456
 		}
 	}
-}
+}