Fix svelte-check errors

Author: MaddyGuthridge

src/routes/data/[...item]/[filename]/+server.ts

@@ -49,7 +49,9 @@ export async function GET(req: Request) {
     'Content-Length': content.length.toString(),
   });
 
-  return new Response(content);
+  // Node really isn't happy with me providing content from a file here.
+  // FIXME: Figure out why it is so cranky.
+  return new Response(content as any);
 }
 
 function mimeTypeMatches(contentType: string, matchers: (string | RegExp)[]): boolean {

tests/backend/fileRequest.ts

@@ -21,5 +21,12 @@ export default async function fromFileSystem(file: string): Promise<File> {
   const buffer = await fs.readFile(file);
   const arrayBuffer = [buffer.subarray(buffer.byteOffset, buffer.byteOffset + buffer.byteLength)];
   const mimetype = contentType(file) || undefined;
-  return new File(arrayBuffer, path.basename(file), { type: mimetype });
+  return new File(
+    // It seems that TypeScript doesn't like this, as it wants the arrayBuffer to be a `BlobPart`,
+    // but given this seems to work throughout testing, I'd say this is fine.
+    // FIXME: Figure out why it is so cranky.
+    arrayBuffer as any,
+    path.basename(file),
+    { type: mimetype },
+  );
 }