SDL labels south as a and east as b; on Switch remap so physical A
confirms and physical B cancels in launcher and NamingScreen.
Co-authored-by: Cursor <cursoragent@cursor.com>
love-nx emits gamepad+raw on one press; NamingScreen saw a+b and always
erased. Skip raw when isGamepad(); align NX Y→a/X→b; prefer A if both.
Co-authored-by: Cursor <cursoragent@cursor.com>