Start Osmo Action 6 support

[erik-sutton95]

Start Osmo Action 6 support. BLE identity and an official D-Log M cube already exist. Live view is not captured and must not be invented.

README hardware focus stays Pocket 4 / 4 Pro + Nano until Action 6 live is proven.

Related: D-Log M mapping · Finish Nano · roadmap index

What is already in tree

• BLE model 0x0018 "Osmo Action 6", verified: true, name match action6
• usesCapturedLiveEnable is false for names containing action / 360
• Session copy: “Live view for this camera is not captured yet.”
• Family is .other (not pocket/nano) — color-mode set currently falls through to Pocket Normal/HDR/D-Log/D-Log2 unless we special-case D-Log M by name
• Official cube DJI_Official_Action6_DLogM_Rec709_33.cube

Workstreams

1. Capture live enable (blocker)

• Labeled Mimo Action 6 live-view capture (gitignored captures/)
• Table receiver, codec (HEVC vs AVC), any gate opcode — do not reuse Pocket 0x09/0xa8 rcv 0x08 or Nano 0x41 without evidence
• Document EIS / horizon / shooting-mode differences vs Pocket

2. Pairing without lying

• BLE + SoftAP pair may already work; if live is skipped, the UI must stay on a clear “no live view yet” state (already started)
• Do not show Pocket gimbal stick / AF on Action

3. Color + LUT only (can land before live)

• Treat Action 6 as a D-Log M body for looks (OfficialDJILUT.dLogM(cameraName:) already prefers the Action 6 cube)
• Do not advertise Action 6 as a live monitor in README until workstream 1 lands

Done when

Either (a) Action 6 live is captured and enabled on iOS with a hardware note, or (b) we pair + LUT/media only and README still does not list Action 6 as a live target.

[erik-sutton95]

Tracked as maintainer spike #90.