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-rows.svelte

@@ -1,4 +1,5 @@
 <script lang="ts">
+	import { resolve } from '$app/paths';
 	import BookCover from './book-cover.svelte';
 	import BookActionsMenu from './book-actions-menu.svelte';
 	import * as Tooltip from '$lib/components/ui/tooltip/index';
@@ -120,7 +121,7 @@
 				? 'cursor-pointer'
 				: ''}"
 		>
-			<a href="/book/{book.id}" class="shrink-0">
+			<a href={resolve('/(root)/(library)/book/[bookId]', { bookId: String(book.id) })} class="shrink-0">
 				<BookCover {book} height={110} />
 			</a>
 
@@ -128,7 +129,7 @@
 				<div class="flex items-start gap-2">
 					<div class="min-w-0 flex-1">
 						<a
-							href="/book/{book.id}"
+							href={resolve('/(root)/(library)/book/[bookId]', { bookId: String(book.id) })}
 							class="line-clamp-2 font-serif text-sm leading-snug hover:underline"
 						>
 							{book.title}
@@ -166,7 +167,9 @@
 					{#each book.tags.slice(0, TAG_LIMIT) as tag (tag.id)}
 						<a
 							data-row-control
-							href="/library/{libraryState.activeLibrary?.id}/view?tags={tag.id}"
+							href="{resolve('/(root)/(library)/library/[libraryId]/view', {
+								libraryId: String(libraryState.activeLibrary?.id ?? '')
+							})}?tags={tag.id}"
 							class={badgeVariants({ variant: 'secondary' })}>{tag.name}</a
 						>
 					{/each}