Fix rails-ujs import syntax causing thumbs up/down buttons to not work

[mmx900]

Context

• Currently there is __webpack_require__(...).start is not a function error in the JavaScript console. This error seems to have appeared after a recent upgrade to Rails 7. If I downgrade rails-ujs to 6.x, the error disappears. Additionally, it seems to break some functionallity that uses rails-ujs. This PR fixes the error and adds tests to prevent regression, as there were no existing tests for this functionality.

Summary of Changes

• Fix js error by following current documentation of rails-ujs.
• Add missing specs to prevent regression and ensure the voting functionality works as expected.

Checklist

• Tested Mobile Responsiveness
• Added Unit Tests
• CI Passes
• Deploys to Heroku on test Correctly (Maintainers will handle)
• Added Documentation (Service and Code when required)

Screenshots

Before

After

[DeeDeeG]

Thanks for this!

The syntax of the new import statement does indeed match the linked docs for rails-ujs.

New tests are much appreciated!

Tests (including new ones) are passing in CI. Looks good.

Thank you!

Merging this now.