Team plan and referrals pages

New

• Team plan page -- /teams covers the shared workspace, seat entitlements, and what admins can and cannot see. Pricing now shows real per-seat rates instead of "Contact us": $29/seat/mo, $25 annual, minimum 3 seats.
• Referral program page -- /referrals explains the rewards -- a free second month of Pro for your friend, a month of Pro off your next invoice, and a month of Claude Pro at three referrals -- with the timing and eligibility rules.

Improved

• The conversation limit is visible -- on Basic, the chat home names the reset date, disables starter prompts, and offers an upgrade instead of a dead message box. Deleting your last conversation asks for confirmation first, since the slot doesn't come back until the period rolls over.
• X asks for a reconnect -- the X card flags when its permissions are too narrow to import likes and following, rather than failing quietly. Everything else keeps importing meanwhile.