Feature: Private todo list

[jschuur]

Initial scope: Logged in user gets to manage a basic todo list and mark items as done.

Other users in the room see the number of items on the list and the overall completion status, but not the text of the items on the list.

More complex iterations later.

• [x] add new items
• [x] store in localstorage
• [x] mark as done
• [x] delete items
• [x] local progress
• [x] drag to reorder
• [x] store create/update/completion dates
• [x] click to collapse
• [x] delete all button
• [x] max # of items (list on placeholder)
• [ ] posthog reporting
• [ ] shoot confetti (once) when list completed

[jschuur]

Ideas for later features: Encrypt and store in the DB, add public aliases for todo text, track time spent, expire old todo items after 2-3 days.

[jschuur]

Local only version implemented in c210bde248e7df34b87ea1682c35938d8ee57bec and sharing functionality moved to #102.