Function truncate_string 

pub fn truncate_string(s: &str, max_width: usize) -> String

Truncate a string to fit within a maximum display width

Handles Unicode properly by counting graphemes, not bytes. Adds ellipsis if truncation occurs.

Arguments

• s - The string to truncate
• max_width - Maximum display width in characters

Returns

The truncated string, or the original if it fits