style: fix test name typo, table-test reporting, validator wording

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

internal/tui/account.go

@@ -36,7 +36,7 @@ func ValidFromAddress(s string) error {
 		return nil
 	}
 	if _, err := mail.ParseAddress(s); err != nil {
-		return errors.New("from address must be a valid email address")
+		return errors.New("from address must be a valid email address or \"Name <email>\"")
 	}
 	return nil
 }