Show modal at session start to introduce quick exit

Problem/Motivation

In the current implementation, the only way a user would know that the quick exit button is an option would be to notice it on the page. Though it may be well placed for visibility, there's no context for what this button does. Some users might know about it from other websites, but it's not widely known or necessarily understood. Users on this site might also not know what to expect from using the button.

Steps to reproduce

1. Visit https://goaskalice.columbia.edu/ on desktop:
1. Note the "Are You In An Emergency?" link and "Exit Site" button at the top-right
2. Scroll down the page, and notice it moves to the sticky nav
2. Visit the site on mobile
1. Note the "Exit Site" button at the top-right

Proposed resolution

• When the user first opens the website, open the modal
• This should be the case for every new session, timing out after 30 minutes of leaving the site
• Text for this modal should be configurable, but include as a default:
• • Heading: "Quick Exit"
  • Body: "Select the "Exit Site" button at the top-right of the screen to quickly leave this website and delete your most recently-viewed page from browser history."
  • Details: "By following this button, you'll open two new, unrelated websites, to disguise your visit to this one. This button will only delete your most recently-viewed page from browser history. If you have visited other sensitive pages on this website, a search engine, or elsewhere, please manually delete them from your history.
  • Button, Primary: "Got It"
  • Button, Secondary: "Exit Site"
  • Button details: "Try it now"

Remaining tasks

1. Provide design
2. Build

User interface changes

API changes

Data model changes