Add sidebar navigation and global command search

src/routes/maintenance/[id]/+page.svelte

@@ -1,6 +1,5 @@
 <script lang="ts">
     import { contextHref } from '$lib/navigation-context.js';
-    import BackLink from '$ui/components/BackLink.svelte';
     import { onMount, untrack } from 'svelte';
     import { page } from '$app/stores';
     import type { WatchdogDetail, WatchdogEvidence } from '$lib/watchdog.js';
@@ -103,7 +102,6 @@
             {#if canDismiss}<Button variant="ghost" disabled={!!busy || activeOperation} loading={busy === 'dismiss'} onclick={() => update('dismiss')}>Dismiss incident</Button>{/if}
         {/snippet}
     </SectionHeader>
-    <BackLink fallback="/maintenance" />
 
     {#if loadError}<div class="ui-error" role="alert">{loadError} {detail ? 'Showing the last successful refresh.' : ''}<Button size="sm" disabled={!!busy} onclick={load}>Retry refresh</Button></div>{/if}
     {#if actionError}<p class="ui-error" role="alert">{actionError}</p>{/if}