Hides ScreenHeader, LeftSidebar, and ExplorerSidebar on desktop,
replacing the split layout with the single focused pane. Respects
macOS traffic light padding in the tab bar when active. Shortcut
is restricted to workspace screens. Also nudges traffic light
buttons up 3px globally.
Downloads and loads React DevTools Chrome extension using Electron 41's
session.extensions API directly, avoiding the deprecated session.loadExtension
used by electron-devtools-installer. Extension is cached in userData after
first download. Only loaded when !app.isPackaged.