Mock up the UI in Figma

[tylanmm]

We for sure need to design the following pieces of UI.

• [ ] Login/register page
• [ ] Activity list view
• [ ] Activity detail view
• [ ] "My Dates" list view
• [ ] Date details view
• [ ] Date builder view (for generating a date given time, activity, and maybe location constraints)
• [ ] Settings/Preferences view