Function validate_name 

pub fn validate_name(parsed: &Args) -> Result<(), FlagValidationError>

Validate --name/-n post-parse.

The parser records an empty value verbatim (--name "" → name = Some("")). main.ts:590-597 rejects empty/whitespace-only names with exit 1 before appending to session info.

Errors

Returns an error when --name is present but empty or whitespace-only.