feat: enhance photo viewer navigation and state management

- Implemented next and previous photo navigation in the photo viewer, allowing users to cycle through images while skipping videos.
- Introduced state management for current items in the folder viewer to support navigation functionality.
- Updated the InfiniteVirtualGrid and VirtualizedFolderGrid components to handle item clicks with index support for better user experience.

src/app/folder-viewer/page.tsx

@@ -148,7 +148,6 @@ const FolderViewerPage = () => {
   const handlePhotoClick = (item: FileSystemItem, index: number) => {
     if (item.type === 'photo' && item.id) {
       setSelectedPhoto(item);
-      setCurrentPhotoIndex(index);
       setIsPhotoViewerOpen(true);
     }
   };
@@ -158,16 +157,40 @@ const FolderViewerPage = () => {
     setSelectedPhoto(null);
   };
 
+  const [currentItems, setCurrentItems] = useState<FileSystemItem[]>([]);
+
   const handleNextPhoto = () => {
-    // This would need to be implemented with the current items list
-    // For now, just close the viewer
-    handleClosePhotoViewer();
+    // Navigate to next photo, skipping videos
+    const photos = currentItems.filter(item => item.type === 'photo' && item.id);
+    if (photos.length === 0) return;
+    
+    const currentPhotoId = selectedPhoto?.id;
+    if (!currentPhotoId) return;
+    
+    const currentIndexInPhotos = photos.findIndex(p => p.id === currentPhotoId);
+    if (currentIndexInPhotos === -1) return;
+    
+    const nextIndex = (currentIndexInPhotos + 1) % photos.length;
+    const nextPhoto = photos[nextIndex];
+    
+    setSelectedPhoto(nextPhoto);
   };
 
   const handlePrevPhoto = () => {
-    // This would need to be implemented with the current items list
-    // For now, just close the viewer
-    handleClosePhotoViewer();
+    // Navigate to previous photo, skipping videos
+    const photos = currentItems.filter(item => item.type === 'photo' && item.id);
+    if (photos.length === 0) return;
+    
+    const currentPhotoId = selectedPhoto?.id;
+    if (!currentPhotoId) return;
+    
+    const currentIndexInPhotos = photos.findIndex(p => p.id === currentPhotoId);
+    if (currentIndexInPhotos === -1) return;
+    
+    const prevIndex = (currentIndexInPhotos - 1 + photos.length) % photos.length;
+    const prevPhoto = photos[prevIndex];
+    
+    setSelectedPhoto(prevPhoto);
   };
 
   if (!path) {
@@ -200,6 +223,7 @@ const FolderViewerPage = () => {
         onBreadcrumbClick={handleBreadcrumbClick}
         breadcrumbs={getBreadcrumbs(path)}
         libraries={libraries}
+        onItemsLoaded={setCurrentItems}
       />
 
       {/* Photo Viewer */}
@@ -209,7 +233,7 @@ const FolderViewerPage = () => {
         onClose={handleClosePhotoViewer}
         onNext={handleNextPhoto}
         onPrev={handlePrevPhoto}
-        showNavigation={false}
+        showNavigation={true}
         showBookmarks={false}
         showRatings={false}
         formatFileSize={formatFileSize}

src/app/photos/page.tsx

@@ -19,12 +19,49 @@ interface Photo {
 export default function PhotosPage() {
   const [selectedPhoto, setSelectedPhoto] = useState<Photo | null>(null);
   const [isViewerOpen, setIsViewerOpen] = useState(false);
+  const [photosList, setPhotosList] = useState<Photo[]>([]);
+  const [currentPhotoIndex, setCurrentPhotoIndex] = useState(0);
 
-  const handlePhotoClick = (photo: Photo) => {
+  const handlePhotoClick = (photo: Photo, index?: number) => {
     setSelectedPhoto(photo);
+    if (index !== undefined) {
+      setCurrentPhotoIndex(index);
+    }
     setIsViewerOpen(true);
   };
 
+  const handlePhotosData = (photos: Photo[]) => {
+    setPhotosList(photos);
+  };
+
+  const handleNextPhoto = () => {
+    if (photosList.length === 0) return;
+    
+    const currentPhotoId = selectedPhoto?.id;
+    if (!currentPhotoId) return;
+    
+    const currentIndex = photosList.findIndex(p => p.id === currentPhotoId);
+    if (currentIndex === -1) return;
+    
+    const nextIndex = (currentIndex + 1) % photosList.length;
+    setSelectedPhoto(photosList[nextIndex]);
+    setCurrentPhotoIndex(nextIndex);
+  };
+
+  const handlePrevPhoto = () => {
+    if (photosList.length === 0) return;
+    
+    const currentPhotoId = selectedPhoto?.id;
+    if (!currentPhotoId) return;
+    
+    const currentIndex = photosList.findIndex(p => p.id === currentPhotoId);
+    if (currentIndex === -1) return;
+    
+    const prevIndex = (currentIndex - 1 + photosList.length) % photosList.length;
+    setSelectedPhoto(photosList[prevIndex]);
+    setCurrentPhotoIndex(prevIndex);
+  };
+
   const handleCloseViewer = () => {
     setIsViewerOpen(false);
     setSelectedPhoto(null);
@@ -66,6 +103,7 @@ export default function PhotosPage() {
         onBookmark={handleBookmark}
         onUnbookmark={handleUnbookmark}
         onRate={handleRate}
+        onDataUpdate={handlePhotosData}
       />
 
       {/* Photo Viewer */}
@@ -73,6 +111,9 @@ export default function PhotosPage() {
         photo={selectedPhoto!}
         isOpen={isViewerOpen}
         onClose={handleCloseViewer}
+        onNext={handleNextPhoto}
+        onPrev={handlePrevPhoto}
+        showNavigation={true}
         showBookmarks={true}
         showRatings={true}
         onBookmark={handleBookmark}

src/components/infinite-virtual-grid.tsx

@@ -21,10 +21,11 @@ interface MediaItem {
 
 interface InfiniteVirtualGridProps {
   type: 'video' | 'photo' | 'bookmark';
-  onItemClick: (item: MediaItem) => void;
+  onItemClick: (item: MediaItem, index?: number) => void;
   onBookmark: (id: number) => Promise<void>;
   onUnbookmark: (id: number) => Promise<void>;
   onRate: (id: number, rating: number) => Promise<void>;
+  onDataUpdate?: (items: MediaItem[]) => void;
 }
 
 const ITEM_HEIGHT = 220;
@@ -36,7 +37,8 @@ export default function InfiniteVirtualGrid({
   onItemClick, 
   onBookmark, 
   onUnbookmark, 
-  onRate 
+  onRate,
+  onDataUpdate
 }: InfiniteVirtualGridProps) {
   const [totalItems, setTotalItems] = useState(0);
   const [searchTerm, setSearchTerm] = useState('');
@@ -324,6 +326,23 @@ export default function InfiniteVirtualGrid({
         fetchItems(nextBatchStart, batchEnd);
       }
     }
+    
+    // Collect all available items and notify parent
+    if (onDataUpdate) {
+      const allItems: MediaItem[] = [];
+      const sortedKeys = Array.from(dataCacheRef.current.keys()).sort((a, b) => a - b);
+      
+      for (const batchKey of sortedKeys) {
+        const items = dataCacheRef.current.get(batchKey);
+        if (items) {
+          allItems.push(...items);
+        }
+      }
+      
+      if (allItems.length > 0) {
+        onDataUpdate(allItems);
+      }
+    }
   }, [totalItems, fetchItems, getColumnCount]);
 
   const Cell = ({ columnIndex, rowIndex, style }: any) => {
@@ -352,7 +371,7 @@ export default function InfiniteVirtualGrid({
       <div style={style} className="p-2">
         <Card 
           className="group hover:shadow-lg transition-all duration-300 hover:-translate-y-1 cursor-pointer border-border overflow-hidden h-full"
-          onClick={() => onItemClick(item)}
+          onClick={() => onItemClick(item, index)}
         >
           <div className="relative overflow-hidden bg-muted aspect-video">
             <img

src/components/virtualized-media-grid.tsx

@@ -34,6 +34,7 @@ interface VirtualizedFolderGridProps {
   onBreadcrumbClick: (path: string) => void;
   breadcrumbs: BreadcrumbItem[];
   libraries: {id: number, path: string}[];
+  onItemsLoaded?: (items: FileSystemItem[]) => void;
 }
 
 const ITEM_HEIGHT = 280; // Increased for folder cards
@@ -45,7 +46,8 @@ export default function VirtualizedFolderGrid({
   onBackClick,
   onBreadcrumbClick,
   breadcrumbs,
-  libraries
+  libraries,
+  onItemsLoaded
 }: VirtualizedFolderGridProps) {
   const [items, setItems] = useState<FileSystemItem[]>([]);
   const [loading, setLoading] = useState(false);
@@ -203,6 +205,12 @@ export default function VirtualizedFolderGrid({
     }
   }, [currentPath, fetchItems]);
 
+  useEffect(() => {
+    if (onItemsLoaded) {
+      onItemsLoaded(items);
+    }
+  }, [items, onItemsLoaded]);
+
   const Cell = ({ columnIndex, rowIndex, style }: any) => {
     const columnCount = getColumnCount();
     const index = rowIndex * columnCount + columnIndex;