Due to UOSC loading after input.conf with force flags, it claims mbtn_right globally.
Added 'z' key as alternative menu trigger that UOSC doesn't control.
Also kept 'm' key binding as primary menu trigger.
input.conf still attempts mbtn_right routing but UOSC overrides it.
Test with: Press 'm' or 'z' to open menu
- Remove mbtn_right keybinding from Lua (UOSC claims it globally with force flag)
- Add input.conf with mbtn_right → script-message medios-show-menu routing
- Add medios-show-menu handler in Lua to trigger M.show_menu()
- Keep 'm' key binding as Lua keybinding for redundancy
- Remove extra 'end)' that caused '<eof>' expected syntax error at line 2834
- Add comprehensive logging to M.show_menu() with [MENU] prefix
- Add logging wrappers to keybindings (m and mbtn_right)
- Implement fallback menu opening methods (commandv and command)
- Fix audio-display mpv.conf setting to 'no' (was invalid 'yes')
