[YevheniiKotyrlo]

Problem

TransparencyMode holds every Android backing view, opaque, a remount and the loop's cadence, but its loop always presents, so it cannot show what a canvas shows before its first frame, and it cannot configure a canvas before its surface exists; reproducing either takes a screen of its own.

Solution

• The loop gets a third state, off, which presents nothing, so a remount shows what is on screen before a first frame. The screen reads out the frames presented per second.
• shown hides the canvas, mounts it again while hidden — configured before its surface exists — and reveals it.
• The hide/show button reads mounted, since shown now hides without unmounting; its test id is unchanged.

mounted and shown carry the names of react-native-skia's AndroidViews switches (wcandillon/react-native-skia#4252).

Verification

yarn lint · yarn tsc · the package and web-template builds · yarn test:plugin · yarn check-dawn · yarn build:docs. On a Galaxy S23 (Android 14), a release build opening TransparencyMode: each control does what it says, and with the loop off a SurfaceView that remounts stays a black hole until a first frame, the case #561 fixes (screenshots in the comment below). On a Galaxy S23 (Android 14) the whole suite passes, 222 of 222, as on main c080934e. On an iPad Pro 12.9-inch (4th generation, iOS 27.0.1), built and run as CI's iOS job does on a simulator (Debug build, Metro with CI=true), it passed 221 of 221 before the rebase onto #574 (main 8f664fca: 221 of 221).

[YevheniiKotyrlo]

Device evidence — the controls

loop: every frame, the rate read out	loop: off: the last frame stays
shown off: the stage, the canvas mounted again while hidden	surface, loop: off, remounted: black until a first frame

Galaxy S23 (Android 14, API 34), release build of the example opening TransparencyMode, on main's native code; every control driven through uiautomator, with a screenshot and the frame-rate readout after each step. The last screenshot is a SurfaceView canvas's hole before its first frame, held there by the loop being off.