fix: resolve Decap CMS media 404s and add Turkish translations

- Fix Decap CMS configuration with proper media folder paths
- Add Turkish translations for sharing interface elements
- Implement smart background handling for transparent logos
- Update image path conversion system for CMS compatibility
- Add comprehensive image optimization with Astro assets
- Update all blog post image paths for consistency

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

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

src/data/post/2025-03-08-amator-telsizcilikte-cevrim-nedir.md

@@ -11,7 +11,7 @@ tags:
   - radyo operatörü eğitimi
   - telegram çevrim grupları
 layout: post
-image: ~/assets/images/2025/03/CEvrim.png
+image: /images/2025/03/CEvrim.png
 ---
 ## 🛰️ Amatör Telsizcilikte Çevrimler Nedir? Nasıl Katılım Sağlanır?