Shared film links get a thumbnail card

Added

• Film links shared by text or on social show a thumbnail preview card.
• Archive types: KTL Show, Leg Day and Living Room.
• By Week shows event details, with seasons you can collapse.

Changed

• Credits folded into About, with an accordion on mobile.
• By Dice Roll rebuilt, and the theater moved to /watch/.

Fixed

• Premieres swap in place, and skip-forward works.