Persist the search term on the user list

[DJeanS03]

Persist the value of the user list search input using localStorage, restoring the term automatically when reopening the page or after navigating to details and back. Use a stable key (e.g., users:list:query), save on every input change, and load it on component mount/initialization. Include a “clear search” action that empties the input and removes the key from localStorage.