Fix frontend TypeScript compilation errors

- Fix process.env.NODE_ENV in ApplicationInfo.tsx (use import.meta.env.DEV)
- Remove unused variables and imports in Profile.tsx, ProfileSettings.tsx, RoleManagement.tsx, UserManagement.tsx, UserSettings.tsx
- Fix FormData type issue in UserSettings.tsx (use React.FormEvent<HTMLFormElement>)

frontend/src/components/ApplicationInfo.tsx

@@ -1176,7 +1176,7 @@ function InfoRow({ label, value, referenceValue, infoDescription, jiraHost }: {
   const description = infoDescription || referenceValue?.description || null;
   
   // Debug: log referenceValue info for fields that should have descriptions
-  if (referenceValue && process.env.NODE_ENV === 'development') {
+  if (referenceValue && import.meta.env.DEV) {
   }
 
   return (