switched to NKJV, improved grading, improved styling

src/lib/server/bible.ts

@@ -1,10 +1,26 @@
 import type { BibleBook, Testament, BibleSection } from '$lib/types/bible';
 import { bibleBooks } from '$lib/types/bible';
 
+// Book number (1-66) to book ID mapping derived from bibleBooks order property
+export const bookNumberToId: Record<number, string> = bibleBooks.reduce((acc, book) => {
+	acc[book.order] = book.id;
+	return acc;
+}, {} as Record<number, string>);
+
+// Book ID to book number mapping (reverse lookup)
+export const bookIdToNumber: Record<string, number> = bibleBooks.reduce((acc, book) => {
+	acc[book.id] = book.order;
+	return acc;
+}, {} as Record<string, number>);
+
 export function getBookById(id: string): BibleBook | undefined {
 	return bibleBooks.find((book) => book.id === id);
 }
 
+export function getBookByNumber(number: number): BibleBook | undefined {
+	return bibleBooks.find((book) => book.order === number);
+}
+
 export function getBooksByTestament(testament: Testament): BibleBook[] {
 	return bibleBooks.filter((book) => book.testament === testament);
 }