CJK (Chinese/Japanese/Korean) characters display incorrectly - missing characters

[willzhqiang]

Summary

First off, love the concept of spice-edit! The idea that in the age of AI agents we don't need to memorize tons of hotkeys and can just point-and-click in the terminal is brilliant.

However, I noticed that CJK (Chinese/Japanese/Korean) characters are not rendering correctly. It appears that every other character is being dropped/hidden, likely because CJK characters are "wide characters" that occupy 2 terminal columns, but spice-edit seems to be treating them as single-width.

Steps to Reproduce

1. Create a file with a CJK filename and CJK content:

   echo "中文测试" > /tmp/中文测试.txt

2. Open the directory in spice-edit:

   spiceedit /tmp/

Expected Behavior

• Filename in explorer: 中文测试.txt
• File content: 中文测试

Actual Behavior

• Filename in explorer: 中 测.txt (2nd and 4th characters missing)
• File content: 中 测 (same issue)

It seems like the width calculation assumes each character is 1 column wide, but CJK characters are 2 columns wide (so-called "fullwidth" or "wide" characters). This causes the rendering to consume the space of the next character.

Environment

• macOS
• Terminal: Kitty (but likely reproducible in any terminal)
• Locale: UTF-8

Possible Cause

Most terminal UI libraries need to use a Unicode width library (e.g., Go's golang.org/x/text/width or go-runewidth) to correctly calculate the display width of characters. CJK characters have East_Asian_Width property of W (Wide) or F (Fullwidth), meaning they take 2 cells in a terminal.

Thanks for the great project!