Easy way to see which puzzles a visitor has/has not attempted/completed #154
Description
Throughout the day, visitors would often come in and ask for help in finding which puzzle(s) they were missing, especially when they were close to completing all of them.
It would be very useful if, upon scanning of/typing in a visitor's uid, the admin interface showed a table with all the puzzles, and whether that user completed them, attempted them, or did not interact with them at all.
E.g. (maybe with better choice of emojis!)
| Puzzle | Completion |
|---|---|
| Demo | ✅ |
| Foo | ❌ |
| Bar | ❔ |
Then we'd have to decide whether to send the visitors back on the hunt (they would be helped by having a more integrated map (#153), or help them by showing them the QR code of the missing puzzles (in which case, being able to click/hover on a puzzle and showing its QR code would be very useful)