Replace CatBoost project with Flower.ai in homepage featured section

- Update featured projects to showcase federated learning work
- Flower.ai project demonstrates advanced ML and privacy-preserving techniques
- Better represents current AI/ML focus and technical capabilities

Author: coding-crying

index.html

@@ -63,17 +63,18 @@ <h3>Neo4j Language Learning Tutor</h3>
                     </div>
 
                     <div class="project-card">
-                        <div class="catboost-placeholder">
-                            <div class="catboost-logo">
-                                <h3 style="margin: 0; font-size: 2rem;">CatBoost</h3>
-                                <p style="font-size: 0.9rem; opacity: 0.8; margin: 0.5rem 0;">Gradient Boosting</p>
+                        <div class="project-placeholder">
+                            <div class="placeholder-content">
+                                <h4>Flower.ai</h4>
+                                <p>Federated Learning</p>
                             </div>
                         </div>
                         <div class="project-info">
-                            <h3>Movie Score Prediction ML System</h3>
-                            <p>Ensemble models achieving excellent performance (RMSE ~0.3)</p>
+                            <h3>Federated ActivityPub Recommendation System</h3>
+                            <p>Privacy-preserving federated learning for decentralized social media recommendations</p>
                             <div class="project-links">
-                                <a href="https://github.com/MirkoRUG/Applied-ML-Group17" class="btn btn-small" target="_blank">GitHub</a>
+                                <a href="https://github.com/coding-crying/federated-activitypub-recommendations" class="btn btn-small" target="_blank">GitHub</a>
+                                <a href="https://flower.ai/docs/framework/" class="btn btn-small btn-outline" target="_blank">Docs</a>
                             </div>
                         </div>
                     </div>