Shade battery and Settings Key backlight: board captures

Keyboard-base tasks 6.3 and 6.5 (partial). Board: the first board, landscape profile (DSI-1 transform 270), system c0nlmc24m0gf3y3ybim30ff77lcfsad9-nixos-system-nixos-26.11.20260919.20b1ddd, built from commit “Show the battery in the shade and add a Key backlight setting” rebased on 87e1634e. Captured 2026-10-14 00:37–00:38 UTC.

File	Class	Shows
`shade-landscape-grim.png`	board, native `grim`	`k230-shell-rust --surface shade`: “100% - Full” on the hint line, read from the real `bq27220-0` gauge (`capacity` 100, `status` Full at the same time)
`settings-landscape-grim.png`	board, native `grim`	`k230-shell-rust --surface settings`: Wi-Fi, Brightness, Volume, and the top of Keyboard. The Key backlight row is below the 568 px panel edge
`settings-landscape-drag-injected.png`	board, injected	after an injected upward drag (`tools/inject-tap.sh` on an `evemu-device` clone of the Goodix controller, panel `(480,616)` to `(120,616)`): Settings does not scroll; the file is byte-identical to `settings-landscape-grim.png`

Capture command, as root on the board:

U='runuser -u shell -- env XDG_RUNTIME_DIR=/run/shell WAYLAND_DISPLAY=wayland-1'
$U k230-shell-rust --surface shade;    sleep 2; $U grim /tmp/shade.png
$U k230-shell-rust --surface settings; sleep 2; $U grim /tmp/settings.png

Also read on the board: shell-keyboard-base and k230-battery-policy are active; /var/lib/k230-keyboard-base is drwx------ shell shell and /var/lib/k230 stays drwx------ root root.

Limits:

In landscape, Settings cannot reach Motion, Key backlight or the Power rows, and does not scroll. That predates this change (Motion and Power were already below the edge) and belongs to the landscape change’s task 8.3 (openspec/changes/archive/2026-10-16-the-hdmi-shell-works-in-landscape). The Key backlight row is therefore not yet shown or tapped on the board; its paint is proven only by the portrait host render.
No glass touch, no camera (the bench camera is disconnected), and no operator check of the Key backlight preference turning the LED off.

Three-column Settings (2026-10-14 01:19–01:20 UTC)

System wlsjixr5xqqygrdvawpgjbnv8ng66ziz-nixos-system-nixos-26.11.20260919.20b1ddd, built from “Lay Settings out in three columns at 1232x568” on 933946da.

File	Class	Shows
`settings-three-column-grim.png`	board, native `grim`	every Settings row on the 568 px panel: Wi-Fi, Brightness, Volume; Keyboard, Motion, Key backlight; Reboot…, Power off…
`settings-key-backlight-off-injected.png`	board, injected	after one injected tap at landscape (615, 468), i.e. panel (468, 617): the row reads “Off”

The preference file /var/lib/k230-keyboard-base/key-backlight was absent before (default on), read off after the first injected tap and on after the second. This is the touch path from libinput onward, not the glass, and not a camera view of the LED staying dark while typing.