add hover behavior to transcription timestamps

[mertbagt]

Summary

Checklist

• [n/a] On the frontend, I've made my strings translate-able.
• [n/a] If I've added shared components, I've added a storybook story.
• [n/a] I've made pages responsive and look good on mobile.
• [n/a] If I've added new Firestore queries, I've added any new required indexes to firestore.indexes.json (Please do not only create indexes through the Firebase Web UI, even though the error messages may reccommend it - indexes created this way may be obliterated by subsequent deploys)

Screenshots

Known issues

none at present

Steps to test/reproduce

1. go to a hearing with a transcription
2. hover over a timestamp
3. check that timestamp bolds and underlines when you hover over it and doesn't bold and underline when you cease to hover over it

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Project	Deployment	Review	Updated (UTC)
maple-dev	Ready	Preview, Comment	Dec 14, 2025 7:19pm