Top bar (template, item-type tint, key color) and the whole show/hide
checklist move from admin config to instanceSchema, grouped in the gear
popover ("Top bar" open, "Show / hide" folded, three columns). They are
browser-side choices stored with the layout, not server state. Admin now
holds only credentials, service type, plan, poll interval and the
ProPresenter follow switch. noteCategories moves to the tile too.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
