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/Sidebar.svelte

@@ -4,6 +4,7 @@
 	import Home from '@lucide/svelte/icons/house';
 	import Search from '@lucide/svelte/icons/search';
 	import Folder from '@lucide/svelte/icons/folder';
+	import Disc from '@lucide/svelte/icons/disc-3';
 	import Music from '@lucide/svelte/icons/music';
 	import Upload from '@lucide/svelte/icons/upload';
 	import LogOut from '@lucide/svelte/icons/log-out';
@@ -35,6 +36,7 @@
 	];
 
 	const secondaryLinks = [
+		{ href: '/albums', label: 'Mis álbumes', icon: Disc },
 		{ href: '/library', label: 'Canciones subidas', icon: Folder },
 		{ href: '/upload', label: 'Subir música', icon: Upload }
 	];