Verification to dashboard

[RobertJoonas]

Changes

Move verification (all flows: provisioning, review, and domain_change) to the dashboard (between the top bar and sources/pages reports). It will remain a LiveView, but will be teleported into the stats-react-container with the help of <.portal>. Various UI changes in this PR to make the UI feel more "banner-like".

For reviewers: For UI testing, I encourage playing around with it locally -- this PR builds a dev convenience for mocking different verification outcomes. The same code is also used for E2E testing.

In addition to verification, we'll also move the email reports CTA from stats.html.heex to React. The reason for that is positioning -- otherwise impossible to render it between top bar and stats reports.

New db field and onboarding logic

This PR also includes a migration, adding a new site.onboarding_status field which makes all of this possible. There are currently four different statuses possible:

• :new_site
  • The site was just created, didn't succeed verification, didn't receive any pageviews yet
  • Means that a "Setup required" pill should be rendered on this site card on the /sites page
  • Any links to this dashboard (such as the one in site-switcher.js) should append ?verify_installation=true&flow=provisioning to the URL to initiate a verification banner upon entering the dashboard.
• :verification_completed
  • Advances to this state once a verification success is encountered (no matter through what flow -- provisioning / review / domain_change)
  • Means that "Setup required" won't ever render for this site again, and verification banner won't be triggered automatically for this site anymore. The only way to get verification again is Site Settings > Review Installation
• :first_pageview
  • The site has received at least one pageview
  • Advances to this state when:
    • a full dashboard load happens and the site has pageviews (piggybacking on the same condition where site.stats_start_date is set for the very first time)
    • the site card on the /sites page is about to display "X visitors in the last 24h" (where X > 0) for the very first time
    • (note that either of the above can happen before verification success is encountered, in which case that step is simply skipped. This is also exactly what happens on CE)
  • Similar to :verification_completed, we won't automatically trigger verification anymore
  • In this state, the email reports CTA starts appearing to any site member with editor permissions (owner, admin, editor)
• :completed
  • Everything related to onboarding is done
  • This is the database default for the onboarding_status field -- running the migration will set the new field value to :completed for every existing site.
  • As for new sites (after this PR gets deployed), the only way to get to this state will be to dismiss or action (click the /:domain/settings/email-reports link) the email reports CTA banner.

Migration

• Extract the migration and execute it

Tests

• Automated tests have been added

Changelog

• Need to update and review the flows on CE

Documentation

• Docs have been updated

Dark mode

• The UI has been tested both in dark and light mode