feat(web/m7-363): per-route svelte:head titles for dynamic detail pages

web/src/routes/albums/[id]/+page.svelte

@@ -1,6 +1,7 @@
 <script lang="ts">
   import { page } from '$app/state';
   import { createAlbumQuery } from '$lib/api/queries';
+  import { pageTitle } from '$lib/branding';
   import TrackRow from '$lib/components/TrackRow.svelte';
   import LibrarySkeleton from '$lib/components/LibrarySkeleton.svelte';
   import ApiErrorBanner from '$lib/components/ApiErrorBanner.svelte';
@@ -23,6 +24,10 @@
   }
 </script>
 
+<svelte:head>
+  <title>{pageTitle(query.data?.title ? `Album · ${query.data.title}` : 'Album')}</title>
+</svelte:head>
+
 <div class="space-y-6">
   {#if notFound}
     <div role="alert" class="rounded border border-border bg-surface p-4">