Further RE finding refines FrameEnd byte 0 semantics:
0x02 = persistent commit — saves to onboard NVS as baseline, survives
the firmware's host-mode self-release window (color sticks)
0x01 = transient commit — for live preview/animation frames, doesn't
wear out NVS; requires keepalive or continuous frames
0x00 = silently discarded by firmware (the old bug)
For solaar's "pick a color and walk away" model, users expect the
color to persist. Use 0x02 when writing a real color. When writing
black (off), use 0x01 — matches LGHUB's turn_off_lighting so we don't
save an all-black baseline to the device's NVS.
This should make colors actually stay visible after the firmware
auto-releases host mode, which was the root cause of the "color
doesn't appear" symptom on the G522.
e09f0de107