feat(web-player): add the albums pages

A grid of your albums with a create dialog, and a detail page with the
tracklist, inline editing and a picker that lists the songs you uploaded so
they can be dropped into the album. Covers reuse the playlist mosaic since an
album has no artwork of its own yet.

web-player/src/lib/components/ui/AlbumCard.svelte

@@ -0,0 +1,35 @@
+<script lang="ts">
+	import PlaylistArt from './PlaylistArt.svelte';
+	import { hueFor } from '$lib/theme/color';
+
+	interface Props {
+		id: string;
+		title: string;
+		releaseYear?: number;
+		trackCount: number;
+		trackIds: (string | number)[];
+		index?: number;
+	}
+
+	let { id, title, releaseYear, trackCount, trackIds, index = 0 }: Props = $props();
+
+	const meta = $derived(
+		[releaseYear, `${trackCount} ${trackCount === 1 ? 'canción' : 'canciones'}`]
+			.filter((part) => part !== undefined && part !== null)
+			.join(' · ')
+	);
+</script>
+
+<a
+	href="/albums/{id}"
+	class="group animate-enter min-w-0 text-left"
+	style="animation-delay:{index * 45}ms"
+>
+	<PlaylistArt
+		{trackIds}
+		hue={hueFor(id)}
+		class="aspect-square w-full rounded-art shadow-art transition group-hover:shadow-art-lg"
+	/>
+	<div class="mt-2.5 truncate text-fg">{title}</div>
+	<div class="mt-0.5 truncate text-sm text-fg-3">{meta}</div>
+</a>