Ledger HW - make sure ALL core operations can be done with clear signing

currently some operations like lock display a nice human reable screen if what is happening,
others like delegate display just "selector HEX"

we do not like this,

task is to identify the most critical,and get an update to ledger app to do them beautifully

Start by reviewing the Ledger app's core operations, using lock as the example of a readable screen and delegate as the example that currently shows only selector HEX. Identify which operations are most critical and document the expected clear-signing experience for each. Done means those selected operations display useful human-readable screens instead of raw selector data.

Written by the indexing model from the issue text.