fix: seen message text in light mode

[AlexVCS]

Fixes Issue

My PR closes #678

👨‍💻 Changes proposed(What did you do ?)

Added Tailwind to the

tag that holds the seen or not seen message text.
I added dark:text-white text-primary

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• My code follows the code style of this project.
• This PR does not contain plagiarized content.
• The title and description of the PR is clear and explains the approach.

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[Dun-sin]

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