fix: file list in revert confirmation dialog overlaps instead of scrolling

[nishantmonu51]

• With many changed files, the file list in the revert confirmation dialog rendered as overlapping text instead of scrolling.
• The list is a flex flex-col container with max-h-40 overflow-y-auto, but each li uses truncate (overflow: hidden), which drops the flex items' automatic minimum size to zero — so flexbox compressed the rows vertically rather than overflowing into the scrollbar.
• Added shrink-0 to the list items so they keep their natural height and the list scrolls as intended.

Before this overlapping text -

After this, clear listing and scrollable list -

Checklist:

• Covered by tests
• Ran it and it works as intended
• Reviewed the diff before requesting a review
• Checked for unhandled edge cases
• Linked the issues it closes
• Checked if the docs need to be updated. If so, create a separate Linear DOCS issue
• Intend to cherry-pick into the release branch
• I'm proud of this work!