Wire the per-key painter UI to the G522's per-zone lighting setting and
ship a layout file matching the eight-LED earcup arrangement.
- lib/solaar/ui/perkey/layouts/headset_g522.py (new): 2x5 layout, four
LEDs per earcup in a 2x2 grid with a gap column between, viewed from
outside. Zone IDs used as labels (Logitech firmware numbering).
- lib/solaar/ui/perkey/layouts/__init__.py: register layout against
feature 0x0620 (HEADSET_RGB_HOSTMODE) via name-substring match on
"G522".
- lib/logitech_receiver/settings_templates.py: switch
HeadsetPerZoneLighting from ChoicesMapValidator (limited to the
COLORSPLUS named-color palette) to MapRangeValidator (any 24-bit
RGB). Set editor_class so the painter UI takes over from the old
MapChoice dropdowns. Drops choices_universe; matches the
PerKeyLighting pattern.
LED positions per tester's reference:
Left earcup Right earcup
| 8 | 7 | | 6 | 5 |
| 4 | 3 | | 2 | 1 |
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