run: reorder switch cases to match help() output order

run: reorder switch cases to match help() output order

Both parse_argv() and parse_argv_sudo_mode() handled options in an
order that no longer matched the help text. Reorder the case statements
so the source order mirrors what the user sees in --help.

In parse_argv_sudo_mode(), drop the case 'i' → ARG_VIA_SHELL fall-through
so the cases can be sequenced independently; 'i' now sets arg_via_shell
directly.

Co-developed-by: Claude Opus 4.7 <noreply@anthropic.com>