The @ symbol in email addresses was being encoded as %40 when
constructing invite URLs, causing broken or garbled links when
copied/shared by users.
- Remove encodeURIComponent(email) from server-side invite link
construction in inviteUser.ts (both new invite and regenerate paths)
- Remove encodeURIComponent(email) from client-side redirect URLs in
InviteStatusCard.tsx (login, signup, and useEffect redirect paths)
- Valid Zod-validated email addresses do not contain characters that
require URL encoding for safe query parameter use (@ is permitted
in query strings per RFC 3986 §3.4)
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