fix(os/gview): search file faild from resource manager of package gres

[ynwcel]

• bug:
  • gview:searchFile 尝试从 gres 里搜索文件出错
• test
  • bug:
  • 
  • fix:
  • 

[gqcn]

@ynwcel 感谢参与贡献，目前gres这块的代码正在做一些改进工作，以增加对fs.FS的支持，该PR预计需要挂一段时间，请知悉。

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@ynwcel Thanks for participating in the contribution. The code of gres is currently undergoing some improvement work to add support for fs.FS. This PR is expected to take a while, please be informed.

[ynwcel]

@ynwcel 感谢参与贡献，目前gres这块的代码正在做一些改进工作，以增加对fs.FS的支持，该PR预计需要挂一段时间，请知悉。

@gqcn
修复不会涉及到 gres 。。只会涉及到 gview 的 searchFile 函数，修复之前函数内尝试通过 gres 查找视图文件时，gres 存在但查找失败，即使查找成功。因为 resouce 返回的是 nil 也会导致渲染为空。。

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@ynwcel Thanks for participating in the contribution. The code of gres is currently undergoing some improvement work to add support for fs.FS. This PR is expected to take a while, please be informed.

The fix won't involve gres . . Only the searchFile function of gview is involved. When trying to find the view file through gres in the previous function, gres exists but the search fails, and the search succeeds immediately. Because resouce returns nil, it will also cause the rendering to be empty. .