Update texter view styling to be more responsive

[mau11]

Fixes # (issue)

Description

Styling updates (see screenshots below) + fixed sidescroll on mobile

before (empty chat)

after (empty chat)

before (messages in chat)

after (messages in chat)

Checklist:

• I have manually tested my changes on desktop and mobile
• The test suite passes locally with my changes
• If my change is a UI change, I have attached a screenshot to the description section of this pull request
• My change is 300 lines of code or less, or has a documented reason in the description why it’s longer
• I have made any necessary changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• My PR is labeled [WIP] if it is in progress

[mau11]

cypress test is failing:

https://github.blog/changelog/2024-02-13-deprecation-notice-v1-and-v2-of-the-artifact-actions/

[engelhartrueben]

@mau11 That V2 action was deprecated June 30, 2024, and changing it to V4 fixes that. I ran into it this morning on a different branch - I pushed a commit to stage-main-14.1. Please rebase!

I can take a look at this later tonight, but this looks great (:

[engelhartrueben]

🎉