fixed most svelte issues

bin/web/src/lib/utils.svelte.ts

@@ -0,0 +1,23 @@
+import { Manifest } from "./manifest.svelte";
+import type { SystemStats } from "./systemStats";
+
+export async function req(method: string, url: string): Promise<string> {
+    const response = await fetch(url, {
+        method: method,
+    });
+    const body = await response.text();
+    if (response.status >= 200 && response.status < 300) {
+        return body;
+    } else {
+        throw new Error(body);
+    }
+}
+
+export async function get_manifest(): Promise<Manifest> {
+    const manifest_json = JSON.parse(await req('GET', '/api/qmdl-manifest'));
+    return new Manifest(manifest_json);
+}
+
+export async function get_system_stats(): Promise<SystemStats> {
+    return JSON.parse(await req('GET', '/api/system-stats'));
+}