Logout, Remember Me & Token Expiry Handling

[Sujal-Parsana-17]

Description
Implement logout action and optional “Remember me” behavior. If “Remember me” is unchecked, use sessionStorage; if checked, use localStorage. Also handle token expiry gracefully by detecting 401 responses (see Issue #3).

Suggested files

frontend/src/components/Auth/LogoutButton.jsx

Update AuthContext to respect remember flag

frontend/src/components/Auth/RememberCheckbox.jsx (if desired)

Acceptance criteria

Logout removes token from storage and context, sends user to /login.

Remember me persists token across browser restarts when checked, otherwise session only.

When token expires, user is logged out and shown a friendly message.

Testing checklist

Login with Remember me ON -> close/reopen browser -> still logged in.

Login with Remember me OFF -> new browser session -> not logged in.

Token expiry triggers logout and message.

[meetjakasaniya]

Comment Just "I want to take this" if u want this issue to be assigned to yourself. The assignment is First Come First Serve(FCFS).