Add Component / Composable testing

[cquinn540]

Contributor checklist

• This pull request is on a separate branch and not the main branch
• [] I have run the tests for the backend and frontend depending on what's needed for my changes as described in the testing section of the contributing guide

---

Description

This adds some happy path tests for a composable for fetching images based on the color mode and the sign-in flow.

This also solves some issues where Nuxt plugins don't work in a vitest environment by default, so I have re-injected them into the vitest environment and mocked them where necessary.

Currently there is a limitation with Nuxt's endpoint mocking that you cannot change the status code, preventing me from testing errors. I think I can set up a test server to get around that, but I think that would make this pull request too big, and would be good as a separate issue.

Related issue

• Use composable to fetch image based on theme and add component testing. #1008

[netlify]

✅ Deploy Preview for activist-org ready!

Name	Link
🔨 Latest commit	1c8580c
🔍 Latest deploy log	https://app.netlify.com/sites/activist-org/deploys/674216f4eba1a10008c84592
😎 Deploy Preview	https://deploy-preview-1015--activist-org.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[github-actions]

Thank you for the pull request!

The activist team will do our best to address your contribution as soon as we can. The following is a checklist for maintainers to make sure this process goes as well as possible. Feel free to address the points below yourself in further commits if you realize that actions are needed :)

If you're not already a member of our public Matrix community, please consider joining! We'd suggest using Element as your Matrix client, and definitely join the General and Development rooms once you're in. Also consider joining our bi-weekly Saturday dev syncs. It'd be great to have you!

Maintainer checklist

• The TypeScript and formatting workflows within the PR checks do not indicate new errors in the files changed

• The Playwright end to end and Zap penetration tests have been ran and are passing (if necessary)

• The CHANGELOG has been updated with a description of the changes for the upcoming release and the corresponding issue (if necessary)

[cquinn540]

I noticed the Organizations page doesn't seem to be working for me. I'm not sure if I broke it, my computer is just slow, or it got broken in main.

Let me know if you want to get on a call tomorrow or sometime soon to see what is happening

[andrewtavis]

All's working great, @cquinn540! Thanks so much for getting us started with component testing! 🚀 Really is amazing to finally see this up and running 😊