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/RemoteServerForm.tsx

@@ -1,5 +1,6 @@
-import { useEffect, useState } from 'react'
 import { Loader2, Check, X, CircleHelp } from 'lucide-react'
+import { useEffect, useState } from 'react'
+
 import { type RemoteServer, testCustomRemoteServerConnection } from '../api/remoteServers'
 
 interface Props {