Add Plutonium version checks and scheduled rolling restarts

src/routes/settings/+page.svelte

@@ -6,6 +6,7 @@
     import SectionHeader from '$ui/components/primitives/SectionHeader.svelte';
     import Button from '$ui/components/primitives/Button.svelte';
     import Badge from '$ui/components/primitives/Badge.svelte';
+    import PlutoniumMaintenance from '$ui/components/PlutoniumMaintenance.svelte';
     let data = $state<SystemStatus | null>(null);
     let loading = $state(false);
     let error = $state('');
@@ -38,6 +39,7 @@
         {#if data}<p>Example: {$timeFormat.dateTime(data.checkedAt)}</p>{/if}
         {#if $timeZonePersistenceError}<p role="status">Browser storage is unavailable. Your timezone applies for this visit but cannot be saved.</p>{/if}
     </section>
+    <PlutoniumMaintenance />
     <div class="heading">
         <div><h2>System status</h2><p>Check your connections and the prerequisites for a playable server.</p></div>
         <Button loading={loading} onclick={() => refresh(true)}>Check connections</Button>