Add the /admin/downloads page for monitoring download queue

public/js/download-manager.js

@@ -0,0 +1,42 @@
+$(() => {
+	load();
+});
+const load = () => {
+	$.ajax({
+		type: 'GET',
+		url: '/api/admin/mangadex/queue',
+		dataType: 'json'
+	})
+	.done(data => {
+		console.log(data);
+		const rows = data.map(obj => {
+			var cls = 'uk-label ';
+			if (obj.status === 'Completed')
+				cls += 'uk-label-success';
+			if (obj.status === 'Error')
+				cls += 'uk-label-danger';
+			if (obj.status === 'MissingPages')
+				cls += 'uk-label-warning';
+
+			const statusSpan = `<span class="${cls}">${obj.status}</span>`;
+			return `<tr>
+				<td><a href="${baseURL}/chapter/${obj.id}">${obj.title}</a></td>
+				<td><a href="${baseURL}/manga/${obj.manga_id}">${obj.manga_title}</a></td>
+				<td>${obj.success_count}/${obj.pages}</td>
+				<td>${moment(obj.time).fromNow()}</td>
+				<td>${statusSpan}</td>
+				<td>
+					<a href="#" uk-icon="trash"></a>
+					<a href="#" uk-icon="info"></a>
+				</td>
+				</tr>`;
+		});
+
+		const tbody = `<tbody>${rows.join('')}</tbody>`;
+		$('tbody').remove();
+		$('table').append(tbody);
+	})
+	.fail((jqXHR, status) => {
+		alert('danger', `Failed to fetch download queue. Error: [${jqXHR.status}] ${jqXHR.statusText}`);
+	});
+};