Thai character 'า' (Sara Aa) not rendering in CLI output

Bug Report

Description: Thai vowel character \"า\" (Sara Aa - U+0E32) is not visible in Claude Code CLI output, even though the terminal supports Thai characters correctly.

Environment:

• Terminal: iTerm2 + Warp
• OS: macOS (Darwin 24.6.0)
• The character renders correctly outside Claude Code, only breaks within Claude Code output

Impact:

• Thai text appears with missing vowels in conversational output
• Example: \"สวัสดีครับ\" may display as \"สวสดครับ\" (missing า)
• File contents are unaffected - this is purely an output rendering issue

Expected: Thai characters should render the same as they do outside Claude Code

Actual: \"า\" character is invisible in Claude Code output (but present in the actual data)

Notes:

• This appears to be related to markdown processing or escape sequences in Claude Code's output rendering
• Files read/written by Claude Code contain correct Thai text
• Only the conversational CLI display is affected

---

Created from: Claude Code CLI