Preserve originating views through detail navigation

src/routes/capacity/+page.svelte

@@ -1,4 +1,5 @@
 <script lang="ts">
+    import { contextHref } from '$lib/navigation-context.js';
     import { onMount, untrack } from 'svelte';
     import { beforeNavigate, afterNavigate, goto } from '$app/navigation';
     import { page } from '$app/state';
@@ -95,7 +96,7 @@
         <div class="section-heading"><div><h2 id="host-capacity-title">Host capacity</h2><p>Find the resource that limits the next launch.</p></div><span>{summary.eligibleHosts} / {summary.totalHosts} eligible</span></div>
         {#if !report.current.hosts.length}<div class="empty-hosts"><h3>{report.query.hostId ? 'This host is unavailable' : 'No hosts yet'}</h3><p>{report.query.hostId ? 'Choose another host to view its capacity.' : 'Connect a host to start seeing capacity and history.'}</p><Button href="/hosts">Open hosts</Button></div>
         {:else}<div class="host-grid">{#each report.current.hosts as host (host.id)}<article class="host-card">
-            <div class="host-title"><h3><a href={`/hosts/${host.id}`}>{host.name} <span aria-hidden="true">↗</span></a></h3><span class="status" class:eligible={host.eligible}>{!host.connected ? 'Offline' : hostReadinessLabel(host.readiness)}</span></div>
+            <div class="host-title"><h3><a href={contextHref(`/hosts/${host.id}`, page.url)}>{host.name} <span aria-hidden="true">↗</span></a></h3><span class="status" class:eligible={host.eligible}>{!host.connected ? 'Offline' : hostReadinessLabel(host.readiness)}</span></div>
             <div class="host-estimate"><strong>{count(host.estimatedServers)}</strong><span>additional servers{#if host.eligible && host.limitingResource}<small>Limited by {host.limitingResource.toLowerCase()}</small>{/if}</span></div>
             <div class="game-tags">{#if host.games.length}{#each host.games as game}<span>{game === 't5' ? 'Black Ops I' : 'Black Ops II'}</span>{/each}{:else}<span>No games ready</span>{/if}</div>
             <dl class="host-resources"><div><dt>CPU</dt><dd>{count(host.cpuCoresAvailable)} <small>cores</small></dd><span>{count(host.limits.cpu)} servers fit</span></div><div><dt>Memory</dt><dd>{memory(host.memoryBytesAvailable)} <small>GiB</small></dd><span>{count(host.limits.memory)} servers fit</span></div><div><dt>Ports</dt><dd>{host.portsAvailable} <small>/ {host.totalPorts}</small></dd><span>{host.limits.ports} servers fit</span></div></dl>