Function sudo_timestamp_instruction_lines 

pub fn sudo_timestamp_instruction_lines(
    app: &AppState,
    choice: SudoTimestampChoice,
) -> Vec<Line<'static>>

What: Build scrollable instruction lines for the sudo timestamp setup wizard.

Inputs:

• app: Application state for localized strings.
• choice: Selected timestamp_timeout mapping.

Output:

• Owned lines for the instructions pane (excluding the modal title block).

Details:

• Used by the renderer and by the key handler for scroll clamping.