Drop file in windows will dup '\' in path

[yyjdelete]

Describe the problem:

• Test with the latest Tabby version: 1.0.211 Drop file in windows will dup '' in path

To Reproduce: Just drag and drop a file to tabby window, and see the path

D:\tools\1.txt(conhost or windows termial or cmder) => D:\\tools\\1.txt(tabby)

Yes, for some unknown reason, it's still an vaild path and can be open

\\wsl.localhost\Ubuntu-24.04\home\xxx\1.txt => \\\\wsl.localhost\\Ubuntu-24.04\\home\\xxx\\1.txt

But for file in WSL, is invalid, and can not be open