Dark mode and responsive UI fixes

This patch release fixes dark mode styling and improves the tool approval UI for small containers.

Bug fixes

• Dark mode text colors for tool approval buttons #1380  - Fixed dark mode text colors for approval and deny buttons in the tool approval UI. (Author: @adaam2 )
• Thread list and tool approval UI for small containers #1429  - Fixed scroll-to-bottom arrow visibility in dark mode, made tool approval buttons responsive with container queries, fixed popover toggle race condition for Shadow DOM support, corrected popover and tooltip z-index ordering, fixed thread list item title text wrapping, and resized welcome suggestions layout for small containers. (Author: @adaam2 )