Rename the Config top-nav to 'Admin' and move SSH Access into its sidebar
under a 'Tools' group, instead of a separate top-level nav item. SSH Access is
rendered by SshPage into the config main pane via a renderConfig('ssh-access')
special case; the sidebar item (config-sidebar.js) routes there. SshPage now
mounts into any container (defaults to #config-section). /ssh redirects to
/config?=ssh-access for old links; the standalone ssh-content.html is removed.
Declutters the top bar and gives system/admin features one home that scales
(updates, users, Connect settings can become sidebar entries later).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>
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