Face autofocus has no visible effect on Tiny 3

[vampyren]

Summary

Face autofocus (Face autofocus toggle on the Track page) produces no visible effect on the Tiny 3, even though the device accepts the call.

Details

• Wired to cameraSetFaceFocusR in CameraWorker (independent of AI Track, so they can combine).
• On hardware the SDK logs the call as accepted but there is no observable focus change.
• No code bug was found during the port — this needs SDK-level investigation.

Next steps

• Capture the return code of cameraSetFaceFocusR from the Activity Log on hardware.
• Determine whether it requires a precondition (e.g. AI mode active, a specific run state, or manual-focus mode first).
• Check whether the Tiny 3 exposes face focus at all vs. it being a different-model feature.
• If unsupported on Tiny 3, gate it OFF honestly (disabled + reason) rather than showing a no-op toggle.

Labels: bug, hardware (needs the physical camera to verify).