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/state/bookCollection.svelte.ts

@@ -99,6 +99,9 @@ export class BookCollectionState {
 
 		const url = new URL(page.url);
 		url.searchParams.set('view', next);
+		// Not a route to resolve — this is the current URL with one query param
+		// changed, so it is already fully qualified.
+		// eslint-disable-next-line svelte/no-navigation-without-resolve
 		replaceState(url, page.state);
 	}
 
@@ -137,7 +140,8 @@ export class BookCollectionState {
 		url.searchParams.set('orderBy', this.orderBy);
 		url.searchParams.set('sortOrder', this.sortOrder);
 
-		// pushState(url.toString(), {})
+		// Same as setView: the current URL with sort params rewritten, not a route.
+		// eslint-disable-next-line svelte/no-navigation-without-resolve
 		goto(url.toString());
 
 		this.loadNewBooks();
@@ -285,9 +289,7 @@ export class BookCollectionState {
 
 		return wanted.every(([key, values]) => {
 			const current = this.filters[key] ?? [];
-			return (
-				current.length === values.length && values.every((value) => current.includes(value))
-			);
+			return current.length === values.length && values.every((value) => current.includes(value));
 		});
 	}