feat: Implement image thumbnail generation, storage, and API endpoints for assets, including a regeneration utility.

utils/image_utils.py

@@ -0,0 +1,27 @@
+from io import BytesIO
+from typing import Tuple, Optional
+from PIL import Image
+import logging
+
+logger = logging.getLogger(__name__)
+
+def create_thumbnail(image_data: bytes, size: Tuple[int, int] = (800, 800)) -> Optional[bytes]:
+    """
+    Creates a thumbnail from image bytes.
+    Returns the thumbnail as bytes (JPEG format) or None if failed.
+    """
+    try:
+        with Image.open(BytesIO(image_data)) as img:
+            # Convert to RGB if necessary (e.g. for RGBA/P images saving as JPEG)
+            if img.mode in ('RGBA', 'P'):
+                img = img.convert('RGB')
+            
+            img.thumbnail(size)
+            
+            thumb_io = BytesIO()
+            img.save(thumb_io, format='JPEG', quality=85)
+            thumb_io.seek(0)
+            return thumb_io.read()
+    except Exception as e:
+        logger.error(f"Failed to create thumbnail: {e}")
+        return None