v2.4.0

v2.4.0 — RAM-mode persistent paths

RAM-mode gains a Persistent paths option (module 14, new P menu choice):
bind-mount an app's mutable state from /home (untouched by either RAM-mode
strategy) onto the path it actually expects, so it survives reboots even
though /var — or all of / under overlay — is otherwise wiped every time.
Auto-detects installed apps and offers two verified presets (Lyrion Music
Server, Tune Server's self-updating /opt/tune), migrates existing data on
first enable, and a symmetric removal restores it. Independent of the
Enable/Disable choice.

Ported from the x86 sibling, inspired by a HiFi-forum member's manual LMS
bind-mount setup; validated end-to-end on real hardware (add, reboot-
survival, remove/restore) — one stdin-redirection bug in the removal
prompt found and fixed along the way.