Improved memory detail UI with better document icons and layout and Added dark mode support to the Chrome extension button
### What changed?
- Enhanced the WebsiteCard component with an `onOpenDetails` prop
- Improved the MemoryDetail component with:
- Better layout for document headers and source links
- Enhanced content scrolling with proper height constraints
- Improved spacing and padding in various sections
- Added favicon support to document icons, showing website favicons for webpage documents
- Fixed document type detection for webpages and URLs
- Added dark mode support to the Chrome extension button component with appropriate color classes
[Screen Recording 2025-10-03 at 11.34.01 PM.mov <span class="graphite__hidden">(uploaded via Graphite)</span> <img class="graphite__hidden" src="https://app.graphite.dev/user-attachments/thumbnails/2f6ceef2-43a2-4e11-bafa-0f3ce614696b.mov" />](https://app.graphite.dev/user-attachments/video/2f6ceef2-43a2-4e11-bafa-0f3ce614696b.mov)
