* fix(computer-use): observe minimized, hidden and other-Space windows on macOS without a restore
macOS only enumerated on-screen windows and dropped minimized AX windows,
so an app whose window was minimized, hidden or on another Space (any
full-screen app) could not be observed, and agents fell back to
--restore-window, which activated every window of the app and switched
the user's Space.
Enumerate every window, keep the off-screen ones accessibility can still
read (other-Space windows by remote token, closed windows dropped by
their Space membership), and report their real minimized and off-screen
state. Background pointer and key input on such a window refuses before
sending anything. --restore-window now raises only the target window,
once per request, and delivery is measured from whether the target
became frontmost.
* fix(computer-use): pin the restored window and prefer visible windows by default
* fix(computer-use): keep window-index cache keys and stale-element checks across a restore
* fix(computer-use): restore only this app's resolved window and refuse a closed target before raising
* docs(computer-use): say macOS reads minimized, hidden and other-Space windows
