Hide-IP was a sidebar button held only in memory, so it reset on reload.
Moved it into the Settings modal Canvas section and persist it to
localStorage (new ipDisplay util); the canvas store now seeds hideIp from
storage and writes through on toggleHideIp/setHideIp. Settings is now also
reachable in standalone (no-backend) builds, with the backend-only status
interval guarded so the modal still works there.
ha-relevant: yes
Clicking Settings now opens a dialog with the status-check interval and
canvas snap options plus Save/Cancel, replacing the inline left-panel view.
Removes the 'settings' Sidebar view and SettingsPanel component.
ha-relevant: maybe
Pouzor