Give key-promoted focus the whole surface master
Clicking a menubar piano key provisionally arms local key delivery, and the first mapped physical key promotes that audition to keyboard- performance focus. But the promotion set `keyboardPerformanceFocusActive` and stopped there — the bookkeeping half. The surface half (TrackDrum armed, click shields up, cursor hidden and pinned, focus watchdog running) lived inside `beginFocusCaptureFromShortcut`, reachable only by the Command double-tap. So a promoted session wore every sign of focus — red glow, defocus cue, icon state — over a dead trackpad. Split that half out as `enterFullPerformanceFocus` and give it to both doors. The promotion defers it off the key event for the same reason the quiet-focus tap defers: arming does real AppKit work, and running it mid-dispatch resigns the very capture it is promoting. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>