* fix(dashboard-popout): zoom the pop-out window, not the main window behind it
The View menu's zoom handlers always sent terminal:zoom to the main
window, so zooming while the dashboard pop-out was focused zoomed the
window behind it. The pop-out also never applied the persisted
uiZoomLevel, so it always rendered at 100% in a zoomed app.
The pop-out now applies uiZoomLevel on dom-ready and follows app-zoom
changes while open (main-window zoom, settings control, mobile ui.set).
Menu zoom routes to the pop-out when it is the focused window, stepping
its own webContents zoom, and a narrow before-input-event handler
resolves the zoom.in/out/reset chords (honoring keybinding overrides)
since the pop-out has no renderer-side shortcut plumbing. The step/clamp
constants move to shared/ui-zoom-level.ts so main and renderer share one
definition.
* fix(dashboard-popout): isolate window zoom
* fix(dashboard-popout): deny unused permissions
* docs(dashboard-popout): clarify wheel zoom path
