fix: resolve dropdown menu visibility issue in admin events table

- Changed Card container from overflow-hidden to overflow-visible
- Added overflow-y-visible to prevent vertical clipping
- Dropdown menu now properly displays even with few events
- Table only scrolls when content exceeds viewport height

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -11,8 +11,7 @@
 
 **PicPeak** is a powerful, self-hosted open-source alternative to commercial photo-sharing platforms like PicDrop.com and Scrapbook.de. Designed specifically for photographers and event organizers, PicPeak makes it simple to share beautiful, time-limited photo galleries with clients while maintaining full control over your data and branding.
 
-![PicPeak Gallery Preview](https://github.com/the-luap/picpeak/assets/placeholder-hero.png)
-> 📸 *Gallery preview will be updated soon with latest interface*
+![PicPeak Gallery Preview](docs/screenshot-gallery.png)
 
 ## 🌟 Why Choose PicPeak?