chore: Refactor tests to use findBy queries for better async handling, update mock implementations, and clean up imports across various test files. Adjust toast utility to use for-of loops for callback execution. Update Vite and Vitest configuration files for consistency.

frontend/src/components/WebSocketStatusCard.tsx

@@ -1,6 +1,7 @@
-import { useState } from 'react';
+import { formatDistanceToNow } from 'date-fns';
 import { Wifi, WifiOff, Activity, Clock, Filter, Globe } from 'lucide-react';
-import { useWebSocketConnections, useWebSocketStats } from '../hooks/useWebSocketStatus';
+import { useState } from 'react';
+
 import {
   Card,
   CardHeader,
@@ -11,7 +12,8 @@ import {
   Skeleton,
   Alert,
 } from './ui';
-import { formatDistanceToNow } from 'date-fns';
+import { useWebSocketConnections, useWebSocketStats } from '../hooks/useWebSocketStatus';
+
 
 interface WebSocketStatusCardProps {
   className?: string;