fix getActiveVisitors return type

src/components/metrics/ActiveUsers.tsx

@@ -24,7 +24,7 @@ export function ActiveUsers({
 
   const count = useMemo(() => {
     if (websiteId) {
-      return data?.[0]?.x || 0;
+      return data?.x || 0;
     }
 
     return value !== undefined ? value : 0;

src/queries/analytics/getActiveVisitors.ts

@@ -13,7 +13,7 @@ export async function getActiveVisitors(...args: [websiteId: string]) {
 async function relationalQuery(websiteId: string) {
   const { rawQuery } = prisma;
 
-  return rawQuery(
+  const result = await rawQuery(
     `
     select count(distinct session_id) x
     from website_event
@@ -22,6 +22,8 @@ async function relationalQuery(websiteId: string) {
     `,
     { websiteId, startAt: subMinutes(new Date(), 5) },
   );
+
+  return result[0] ?? null;
 }
 
 async function clickhouseQuery(websiteId: string): Promise<{ x: number }> {