Preserve originating views through detail navigation

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

@@ -1,4 +1,6 @@
 <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';
@@ -101,6 +103,7 @@
             {#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}
@@ -108,7 +111,7 @@
 
     {#if incident && detail}
         <section class="summary" aria-label="Incident status">
-            <div class="row-heading"><WatchdogStatus state={incident.state} />{#if incident.server_deleted_at}<Badge>Deleted</Badge>{:else}<a href={`/servers/${encodeURIComponent(incident.server)}`}>View server</a>{/if}</div>
+            <div class="row-heading"><WatchdogStatus state={incident.state} />{#if incident.server_deleted_at}<Badge>Deleted</Badge>{:else}<a href={contextHref(`/servers/${encodeURIComponent(incident.server)}`, $page.url)}>View server</a>{/if}</div>
             <h2>{incident.summary}</h2>
             <p>{explanation}</p>
             {#if activeOperation && (canRetry || canDismiss)}<p>Complete or cancel the active provisioning operation before retrying or dismissing this incident.</p>{/if}
@@ -120,7 +123,7 @@
                 {#if evidence.containerState}<div><dt>Observed container state</dt><dd>{evidence.containerState}</dd></div>{/if}
             </dl>
             {#if evidence.reason && evidence.reason !== incident.summary}<p class="observed-reason">Observed reason: {evidence.reason}</p>{/if}
-            {#if !incident.server_deleted_at}<div class="links"><a href={`/servers/${encodeURIComponent(incident.server)}?tab=diagnostics`}>Diagnose connection</a><a href={`/servers/${encodeURIComponent(incident.server)}?tab=logs`}>Open server logs</a></div>{/if}
+            {#if !incident.server_deleted_at}<div class="links"><a href={contextHref(`/servers/${encodeURIComponent(incident.server)}?tab=diagnostics`, $page.url)}>Diagnose connection</a><a href={contextHref(`/servers/${encodeURIComponent(incident.server)}?tab=logs`, $page.url)}>Open server logs</a></div>{/if}
         </section>
 
         <section aria-labelledby="recovery-title">
@@ -133,7 +136,7 @@
                         {#if action.operation_stage}<p>{action.operation_stage}</p>{/if}
                         {#if action.operation_error}<p class="error">{action.operation_error}</p>{/if}
                         <time datetime={action.created_at}>{$timeFormat.dateTime(action.created_at)}</time>
-                        <div class="links"><a href={`/provisioning/${encodeURIComponent(action.operation_id)}`}>View provisioning</a>{#if action.campaign_id}<a href={`/campaigns/${encodeURIComponent(action.campaign_id)}`}>View repair campaign</a>{/if}</div>
+                        <div class="links"><a href={contextHref(`/provisioning/${encodeURIComponent(action.operation_id)}`, $page.url)}>View provisioning</a>{#if action.campaign_id}<a href={contextHref(`/campaigns/${encodeURIComponent(action.campaign_id)}`, $page.url)}>View repair campaign</a>{/if}</div>
                     </article>
                 {/each}
             </div>{/if}