[BUG] Command @ File refrence not work with Non-ASCII

Environment

• Platform (select one):
• Anthropic API
• Claude CLI version: 1.0.83 (Claude Code)
• Operating System: Windows 11, WSL2, Ubuntu 22.04 nodejs=v20.19.4
• Terminal: Windows Terminal

Bug Description

<!-- A clear and concise description of the bug -->

Steps to Reproduce

1. If folder path contains Non-ASCII word

Expected Behavior

This is my folder structure

 tree
.
└── level1
    ├── level2
    │   ├── 产品.html
    │   ├── 关于.html
    │   ├── 服务.html
    │   ├── 联系.html
    │   └── 首页.html
    └── 中文
        ├── 产品.html
        ├── 关于.html
        ├── 服务.html
        ├── 联系.html
        └── 首页.html

# in claude
@level1/中文/   expect to show filelist dropdown like @level1/level2/ .  but it doesn't.

Below is a expected
 > @level1/level2/     level2 show filelist dropdown
  level1/level2/
  level1/level2/服务.html
  level1/level2/产品.html
  level1/level2/联系.html
  level1/level2/关于.html
  level1/level2/首页.html

Actual Behavior

# in claude
@level1/中文/    no file list dropdown shows below

Additional Context

This is my test folder stucture
testNonAsciiPath.zip