Ymodem Upload Command Configuration Issue

Problem Statement:
The current Ymodem upload command settings (rx/ry/rz) are configurable but cannot be fully removed or disabled.
This leads to file transfer failures when frequent command switching is required for sending different files via Ymodem.

Suggested Solution:
Add an enable/disable toggle feature for Ymodem upload commands.

Your response and updates would be greatly appreciated.

Start by locating the Ymodem upload command configuration and the handling for the rx, ry, and rz commands. Trace how commands are selected during file transfers, then verify that an enable/disable toggle prevents the selected commands from being used and supports switching between files without transfer failures.

Written by the indexing model from the issue text.