Rework the settings app around hub pages (home, network, displays, input,
apps, privacy, system) with a redesigned sidebar, shared nav state, and new
hub view components. Alongside the redesign: validate webview inputs into
root commands (users, firewall, snapshots, wifi), fix set_charge_threshold
writing the percentage via tee stdin, prevent streaming installs from
hanging on inherited stdin, add frontend type fixes, sync versions to
0.8.2, and clean up clippy/svelte-check warnings.
