refactor: resolve() internal links instead of plain hrefs

Type-checks every link against the real route tree. Caught a dead one: the
book page linked tags to /tag/{id}, a route that has never existed.

frontend/src/routes/(root)/settings/libraries/+page.svelte

@@ -1,4 +1,5 @@
 <script lang="ts">
+	import { resolve } from '$app/paths';
 	import * as Table from '$lib/components/ui/table/index.js';
 	import * as Card from '$lib/components/ui/card/index.js';
 	import { getLibraryState } from '$lib/state/library.svelte';
@@ -36,7 +37,10 @@
 							>{library.name[0]}</Table.Cell
 						>
 						<Table.Cell class="font-medium">
-							<a href={`/library/${library.id}`} class="hover:underline">{library.name}</a>
+							<a
+								href={resolve('/(root)/(library)/library/[libraryId]', { libraryId: String(library.id) })}
+								class="hover:underline">{library.name}</a
+							>
 						</Table.Cell>
 						<Table.Cell class="w-16 text-center">
 							<EllipsisVertical class="scale-75" />