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/lib/components/view/book-thumbnail.svelte

@@ -1,11 +1,12 @@
 <script lang="ts">
+	import { resolve } from '$app/paths';
 	import BookImage from './book-image.svelte';
 	import { Progress } from '$lib/components/ui/progress/index';
 	import { getLibraryState } from '$lib/state/library.svelte';
 	import { getBookSelectionState } from '$lib/state/bookSelection.svelte';
 	import type { Book } from '$lib/schema';
 
-	let { book, class: className = '', ...rest }: { book: Book, class?: string} = $props();
+	let { book, class: className = '', ...rest }: { book: Book; class?: string } = $props();
 
 	const selectionState = getBookSelectionState();
 	const libraryState = getLibraryState();
@@ -24,7 +25,7 @@
 <div class="flex w-full flex-shrink-0 flex-col gap-1 {className}">
 	<!-- Book Cover -->
 	<a
-		href="/book/{book.id}"
+		href={resolve('/(root)/(library)/book/[bookId]', { bookId: String(book.id) })}
 		class="group relative aspect-9/12 w-full overflow-hidden rounded-sm shadow-lg drop-shadow-lg transition-all duration-200 {selected
 			? 'ring-2 ring-star'
 			: ''}"
@@ -51,7 +52,9 @@
 	</a>
 
 	<!-- Book Title -->
-	<a href="/book/{book.id}" class="text-base-content mt-1 line-clamp-2 w-full font-serif text-sm hover:underline"
+	<a
+		href={resolve('/(root)/(library)/book/[bookId]', { bookId: String(book.id) })}
+		class="text-base-content mt-1 line-clamp-2 w-full font-serif text-sm hover:underline"
 		>{book.title}</a
 	>
 
@@ -59,7 +62,9 @@
 	<p class="line-clamp-1 w-full text-xs text-muted-foreground">
 		{#each book.authors as author}
 			<a
-				href="/library/{libraryState.activeLibrary?.id}/view?authors={author.id}"
+				href="{resolve('/(root)/(library)/library/[libraryId]/view', {
+					libraryId: String(libraryState.activeLibrary?.id ?? '')
+				})}?authors={author.id}"
 				class="cs-list hover:underline">{author.name}</a
 			> &thinsp;
 		{/each}