update backend to the new templates

packages/backend/src/misc/bigint.ts

@@ -4,7 +4,7 @@
  */
 
 function parseBigIntChunked(str: string, base: number, chunkSize: number, powerOfChunkSize: bigint): bigint {
-	const chunks = [];
+	const chunks: string[] = [];
 	while (str.length > 0) {
 		chunks.unshift(str.slice(-chunkSize));
 		str = str.slice(0, -chunkSize);

packages/backend/src/misc/generate-invite-code.ts

@@ -12,7 +12,7 @@ export function generateInviteCode(now: number): string {
 		chars: CHARS,
 	});
 
-	const uniqueId = [];
+	const uniqueId: string[] = [];
 	let n = Math.floor(now / 1000 / 60);
 	while (true) {
 		uniqueId.push(CHARS[n % CHARS.length]);

packages/backend/src/misc/prelude/array.ts

@@ -80,7 +80,7 @@ export function lessThan(xs: number[], ys: number[]): boolean {
  * Returns the longest prefix of elements that satisfy the predicate
  */
 export function takeWhile<T>(f: Predicate<T>, xs: T[]): T[] {
-	const ys = [];
+	const ys: T[] = [];
 	for (const x of xs) {
 		if (f(x)) {
 			ys.push(x);

packages/backend/src/misc/verify-field-link.ts

@@ -9,7 +9,7 @@ import type { HttpRequestService } from '@/core/HttpRequestService.js';
 type Field = { name: string, value: string };
 
 export async function verifyFieldLinks(fields: Field[], profileUrls: string[], httpRequestService: HttpRequestService): Promise<string[]> {
-	const verified_links = [];
+	const verified_links: string[] = [];
 	for (const field_url of fields) {
 		try {
 			// getHtml validates the input URL, so we can safely pass in untrusted values