feat: enhance PhotoViewer with keyboard navigation and ID retrieval

- Implemented keyboard navigation for the PhotoViewer, allowing users to close the viewer with 'Escape' and navigate through photos using 'ArrowLeft' and 'ArrowRight' keys.
- Added a utility function to safely retrieve the photo ID, ensuring it is defined before use in various functionalities like bookmarking and rating.

src/components/photo-viewer.tsx

@@ -64,6 +64,39 @@ export default function PhotoViewer({
     }
   }, [isOpen, photo]);
 
+  // Keyboard navigation
+  useEffect(() => {
+    const handleKeyDown = (event: KeyboardEvent) => {
+      if (!isOpen) return;
+
+      switch (event.key) {
+        case 'Escape':
+          handleClose();
+          break;
+        case 'ArrowLeft':
+          if (onPrev) {
+            event.preventDefault();
+            handlePrev();
+          }
+          break;
+        case 'ArrowRight':
+          if (onNext) {
+            event.preventDefault();
+            handleNext();
+          }
+          break;
+      }
+    };
+
+    if (isOpen) {
+      document.addEventListener('keydown', handleKeyDown);
+    }
+
+    return () => {
+      document.removeEventListener('keydown', handleKeyDown);
+    };
+  }, [isOpen, onNext, onPrev]);
+
   const handleClose = () => {
     setIsPhotoLoading(false);
     onClose();
@@ -84,19 +117,19 @@ export default function PhotoViewer({
   };
 
   const handleBookmark = () => {
-    if (onBookmark && 'id' in photo) {
+    if (onBookmark && 'id' in photo && photo.id !== undefined) {
       onBookmark(photo.id);
     }
   };
 
   const handleUnbookmark = () => {
-    if (onUnbookmark && 'id' in photo) {
+    if (onUnbookmark && 'id' in photo && photo.id !== undefined) {
       onUnbookmark(photo.id);
     }
   };
 
   const handleRate = (rating: number) => {
-    if (onRate && 'id' in photo) {
+    if (onRate && 'id' in photo && photo.id !== undefined) {
       onRate(photo.id, rating);
     }
   };
@@ -130,6 +163,11 @@ export default function PhotoViewer({
     return 0;
   };
 
+  const getPhotoId = () => {
+    if ('id' in photo && photo.id !== undefined) return photo.id;
+    return 0;
+  };
+
   if (!isOpen || typeof window === 'undefined') return null;
 
   return createPortal(
@@ -175,7 +213,7 @@ export default function PhotoViewer({
         )}
         
         <img
-          src={`/api/photos/${('id' in photo ? photo.id : photo.id) || ''}`}
+          src={`/api/photos/${getPhotoId()}`}
           alt={getPhotoTitle()}
           className={`max-w-full max-h-[90vh] w-auto h-auto object-contain rounded-lg ${isPhotoLoading ? 'hidden' : ''}`}
           onLoad={() => setIsPhotoLoading(false)}