Recording touch overlay exports at ~220x480 or all-black whenever touches are drawn

Start at the record transport and compare the default overlay path with --hide-touches, using the raw capture path as the size reference. Add a regression test for track-size equality with a scripted tap and ensure overlay failure is reported rather than producing black output. Correct the claims in docs/adr/0025-foldable-apple-panels.md and docs/agents/device-verification.md, then re-measure the listed non-rot90 and iPhone Duo cases.

Purpose

record with the default touch overlay produces an unusable export as soon as the recording contains an interaction: the track collapses to roughly 220x480 regardless of the device's native capture size, and on a long recording it comes out entirely black. Touch indicators are therefore unavailable for exactly the recordings that need them, and the caller gets exit code 0 either way.

This is the recording transport, not the display-selection path. The raw capture honors --display correctly since #2703.

Observed

iPhone 17 simulator 0E0FCBDC-88E2-4CB6-A1DA-E148F77743F4 (iOS 27.0, non-rot90 panel), Xcode 27.1 beta, agent-device at 057dfb7c1. Mean luma measured over sampled frames; content changes across frames are marked where they occur.

Two things follow from the matrix. The trigger is the overlay drawing touch events, not the interactions themselves — --hide-touches stays full size while recording the same taps. And it is not orientation-dependent: the failing device here has a normal portrait panel.

The overlay does draw something, since the small export tracks the screen. Only the geometry and, in the long case, the frame content are lost.

Required behavior

• A recording with touches exports at the same track size as the same recording without touches.
• A recording never exports all-black. If the overlay compositor cannot produce frames, fail the command or drop the overlay and say so in the result, rather than returning a black file with exit 0.
• The choice to drop the overlay must be reported on the response, not inferred from pixel dimensions by whoever notices later.

Completion conditions

• Table above re-measured on a non-rot90 target and on the iPhone Duo inner panel, with the overlay rows matching the --hide-touches rows for size and non-blackness.
• A regression test asserts exported track size equals the raw path's for a scripted tap, since "file exists and is non-zero bytes" would have passed all four broken rows above.
• docs/adr/0025-foldable-apple-panels.md and the --hide-touches note in docs/agents/device-verification.md currently state that the defect is specific to rot90 inner-panel tracks and that the same path works on non-rotated panels. That claim is wrong and was written before this matrix existed; both need correcting as part of this work.

Dependencies

None. Reproducible on main.