Add power switch to enable/disable the selected wheel

[ayozetr]

What

Adds a per-device power switch next to the device selector that enables/disables the selected wheel for the whole system, without unplugging it. When disabled, no game or application can see the wheel — useful when the wheel interferes with other games.

It writes to the USB device's authorized sysfs attribute (1 = visible, 0 = hidden), the same mechanism udisks/kernel expose for USB authorization.

Behaviour

• Turning the switch off deauthorizes the wheel. It then leaves the input subsystem and disappears from the device list, so the switch keeps representing it (off) and shows a small status label (Re-enable <device>) next to it.
• Turning the switch back on re-authorizes it using the stored USB path (the usb_device node and its authorized attribute persist while the wheel stays plugged in).
• The disabled wheel is remembered (persisted in config.ini) so it can be re-enabled even after disappearing from the list or restarting the app.

Implementation

• device: track usb_path and add is_authorized / can_set_authorized / set_authorized.
• device_manager: resolve usb_path via udevice.find_parent('usb', 'usb_device') and add authorize_path to re-enable a wheel that already left the input subsystem.
• gui: wire the switch to the selected device, with a status label and a remembered disabled wheel; update_power_controls keeps the switch coherent on every device-list refresh.
• main.ui / gtk_ui / gtk_handlers: the switch and status label.

Permissions

authorized is owned by root, so a new udev rule data/udev/99-oversteer-wheel-power.rules grants write access to it for the supported wheels only (matched by vendor/product id, avoiding mice/keyboards). It's installed by the existing install_udev_files() flow (pkexec), like the other rules. If the rule is missing, writing fails gracefully and the permissions dialog is shown.

Translations

The new strings (Power, the tooltip, Re-enable {}, the permission message) are translated into all 9 languages (ca, de, es, fi, gl, hu, pl, ru, tr), following each catalogue's existing terminology and tone.

Notes

• Verified msgfmt --check on all 9 catalogues and that the new strings resolve via gettext.
• Tested against a Logitech G923 on the authorized sysfs path.