Make dashboard theme transition smooth and fix link color

[Gold856]

Description

Poking around in DevTools allowed me to find the CSS class needed to apply the theme transition to the dashboard tabs. Now the dashboard tabs transition smoothly with the rest of the card when the theme changes. Also changed the link color to be yellow, which looks much nicer than before.

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Meta

Merge checklist:

• Pull Request title is short, imperative summary of proposed changes
• The description documents the what and why
• If this PR changes behavior or adds a feature, user documentation is updated
• If this PR touches photon-serde, all messages have been regenerated and hashes have not changed unexpectedly
• If this PR touches configuration, this is backwards compatible with settings back to v2024.3.1
• If this PR touches pipeline settings or anything related to data exchange, the frontend typing is updated
• If this PR addresses a bug, a regression test for it is added

[mcm001]

Prettttyyyyyy