fix(monitor): handle a PBS on the same host and complete the PBS views

- Open a PBS installed on this host on the address in use, without probing it
- Never carry or offer localhost addresses between Monitors
- Read the PBS of a PVE+PBS host in Backup Server, with its hostname and version
- Offer the PBS storages without a connection, with address and fingerprint
- Show the disks and pools of a PBS in its Datastores tab
- Hide guest and PVE storage settings on a PBS
- Show a clearer status line for a PBS

AppImage/components/settings.tsx

@@ -1878,7 +1878,7 @@ export function Settings() {
           the matching toggle in NotificationSettings is hidden (the
           preference is preserved in the DB and reappears when detection
           is re-enabled). */}
-      <LxcUpdateDetection />
+      {!isPbs && <LxcUpdateDetection />}
 
       {!isPbs && <>
       {/* GitHub API — optional authentication for app upstream checks. */}