feat: Add S3 playback to main view and improve Music Library layout

- Add play functionality to main browser view for songs with S3 files
- Add onPlaySong prop to PaginatedSongList and SongItem components
- Show 🎵 badge and play buttons for songs with S3 files in main view
- Change Music Library from tile view to list view for better organization
- Improve Music Library layout with better spacing and information display
- Add proper audio playback handling in main App.tsx
- Show linked status badges in Music Library list view

Users can now play S3-linked songs directly from the main browser view,
and the Music Library has a cleaner list layout for easier browsing.

packages/frontend/src/App.tsx

@@ -73,11 +73,41 @@ export default function RekordboxReader() {
   const [selectedSong, setSelectedSong] = useState<Song | null>(null);
   const [isDatabaseInitialized, setIsDatabaseInitialized] = useState(false);
   const [isSwitchingPlaylist, setIsSwitchingPlaylist] = useState(false);
+  const [currentPlayingSong, setCurrentPlayingSong] = useState<Song | null>(null);
   
   // Memoized song selection handler to prevent unnecessary re-renders
   const handleSongSelect = useCallback((song: Song) => {
     setSelectedSong(song);
   }, []);
+
+  // Handle playing a song from the main view
+  const handlePlaySong = useCallback(async (song: Song) => {
+    try {
+      // Check if song has S3 file
+      if (song.s3File?.hasS3File) {
+        setCurrentPlayingSong(song);
+        
+        // Get streaming URL
+        const response = await fetch(`/api/music/${song.s3File.musicFileId}/stream`);
+        if (response.ok) {
+          const data = await response.json();
+          
+          // Create audio element and play
+          const audio = new Audio(data.streamingUrl);
+          audio.play().catch(error => {
+            console.error('Error playing audio:', error);
+          });
+          
+          // Update current playing song
+          setCurrentPlayingSong(song);
+        } else {
+          console.error('Failed to get streaming URL');
+        }
+      }
+    } catch (error) {
+      console.error('Error playing song:', error);
+    }
+  }, []);
   
   // Format total duration for display
   const getFormattedTotalDuration = useCallback((durationSeconds?: number): string => {
@@ -609,6 +639,7 @@ export default function RekordboxReader() {
                         onSearch={searchSongs}
                         searchQuery={searchQuery}
                         isSwitchingPlaylist={isSwitchingPlaylist}
+                        onPlaySong={handlePlaySong}
                       />
                     </Box>
 

packages/frontend/src/components/PaginatedSongList.tsx

@@ -17,11 +17,12 @@ import {
   MenuDivider,
   IconButton,
   Spinner,
-
+  Badge,
 } from '@chakra-ui/react';
 import { Search2Icon, ChevronDownIcon } from '@chakra-ui/icons';
 import type { Song, PlaylistNode } from '../types/interfaces';
 import { formatDuration, formatTotalDuration } from '../utils/formatters';
+import { FiPlay } from 'react-icons/fi';
 
 interface PaginatedSongListProps {
   songs: Song[];
@@ -40,6 +41,7 @@ interface PaginatedSongListProps {
   searchQuery: string;
   depth?: number;
   isSwitchingPlaylist?: boolean; // New prop to indicate playlist switching
+  onPlaySong?: (song: Song) => void; // New prop for playing songs
 }
 
 // Memoized song item component to prevent unnecessary re-renders
@@ -50,7 +52,8 @@ const SongItem = memo<{
   onSelect: (song: Song) => void;
   onToggleSelection: (songId: string) => void;
   showCheckbox: boolean;
-}>(({ song, isSelected, isHighlighted, onSelect, onToggleSelection, showCheckbox }) => {
+  onPlaySong?: (song: Song) => void;
+}>(({ song, isSelected, isHighlighted, onSelect, onToggleSelection, showCheckbox, onPlaySong }) => {
   // Memoize the formatted duration to prevent recalculation
   const formattedDuration = useMemo(() => formatDuration(song.totalTime || ''), [song.totalTime]);
   const handleClick = useCallback(() => {
@@ -62,6 +65,17 @@ const SongItem = memo<{
     onToggleSelection(song.id);
   }, [onToggleSelection, song.id]);
 
+  const handlePlayClick = useCallback((e: React.MouseEvent) => {
+    e.stopPropagation();
+    if (onPlaySong && (song.s3File?.hasS3File || song.hasMusicFile)) {
+      onPlaySong(song);
+    }
+  }, [onPlaySong, song]);
+
+  const hasMusicFile = (song: Song): boolean => {
+    return song.s3File?.hasS3File || song.hasMusicFile || false;
+  };
+
   return (
     <Flex
       key={song.id}
@@ -83,9 +97,16 @@ const SongItem = memo<{
         />
       )}
       <Box flex={1} minW={0}>
-        <Text fontSize="sm" fontWeight="medium" color="white" noOfLines={1}>
-          {song.title}
-        </Text>
+        <Flex align="center" gap={2}>
+          <Text fontSize="sm" fontWeight="medium" color="white" noOfLines={1}>
+            {song.title}
+          </Text>
+          {hasMusicFile(song) && (
+            <Badge colorScheme="green" size="sm" variant="subtle" bg="green.900" color="green.200">
+              🎵
+            </Badge>
+          )}
+        </Flex>
         <Text fontSize="xs" color="gray.400" noOfLines={1}>
           {song.artist}
         </Text>
@@ -98,6 +119,18 @@ const SongItem = memo<{
           {song.averageBpm} BPM
         </Text>
       </Box>
+      {hasMusicFile(song) && onPlaySong && (
+        <IconButton
+          aria-label="Play song"
+          icon={<FiPlay />}
+          size="sm"
+          variant="ghost"
+          colorScheme="blue"
+          onClick={handlePlayClick}
+          ml={2}
+          _hover={{ bg: "blue.900" }}
+        />
+      )}
     </Flex>
   );
 });
@@ -120,7 +153,8 @@ export const PaginatedSongList: React.FC<PaginatedSongListProps> = memo(({
   onSearch,
   searchQuery,
   depth = 0,
-  isSwitchingPlaylist = false
+  isSwitchingPlaylist = false,
+  onPlaySong
 }) => {
   const [selectedSongs, setSelectedSongs] = useState<Set<string>>(new Set());
   const [localSearchQuery, setLocalSearchQuery] = useState(searchQuery);
@@ -217,9 +251,10 @@ export const PaginatedSongList: React.FC<PaginatedSongListProps> = memo(({
         onSelect={handleSongSelect}
         onToggleSelection={toggleSelection}
         showCheckbox={selectedSongs.size > 0 || depth === 0}
+        onPlaySong={onPlaySong}
       />
     ));
-  }, [songs, selectedSongs, selectedSongId, toggleSelection, depth]); // Removed handleSongSelect since it's already memoized
+  }, [songs, selectedSongs, selectedSongId, toggleSelection, depth, onPlaySong]); // Removed handleSongSelect since it's already memoized
 
   // Use total playlist duration if available, otherwise calculate from current songs
   const totalDuration = useMemo(() => {

packages/frontend/src/pages/MusicStorage.tsx

@@ -276,14 +276,57 @@ export const MusicStorage: React.FC = () => {
                     </Button>
                   </VStack>
                 ) : (
-                  <SimpleGrid columns={{ base: 1, md: 2, lg: 3 }} spacing={4}>
+                  <VStack spacing={2} align="stretch">
                     {musicFiles.map((file) => (
-                      <Card key={file._id} size="sm" bg="gray.800" borderColor="gray.700" borderWidth="1px">
-                        <CardHeader pb={2}>
-                          <HStack justify="space-between">
-                            <Badge colorScheme="blue" variant="subtle" bg="blue.900" color="blue.200">
-                              {file.format?.toUpperCase() || 'AUDIO'}
-                            </Badge>
+                      <Box
+                        key={file._id}
+                        p={4}
+                        border="1px"
+                        borderColor="gray.700"
+                        borderRadius="md"
+                        bg="gray.800"
+                        _hover={{ bg: "gray.750" }}
+                      >
+                        <HStack justify="space-between" align="start">
+                          <VStack align="start" spacing={1} flex={1}>
+                            <HStack spacing={2} align="center">
+                              <Text fontWeight="bold" fontSize="md" color="white" noOfLines={1}>
+                                {file.title || file.originalName}
+                              </Text>
+                              <Badge colorScheme="blue" variant="subtle" bg="blue.900" color="blue.200">
+                                {file.format?.toUpperCase() || 'AUDIO'}
+                              </Badge>
+                              {file.songId && (
+                                <Badge colorScheme="green" size="sm" bg="green.900" color="green.200">
+                                  Linked to Rekordbox
+                                </Badge>
+                              )}
+                            </HStack>
+                            {file.artist && (
+                              <Text fontSize="sm" color="gray.400" noOfLines={1}>
+                                {file.artist}
+                              </Text>
+                            )}
+                            {file.album && (
+                              <Text fontSize="sm" color="gray.500" noOfLines={1}>
+                                {file.album}
+                              </Text>
+                            )}
+                            <HStack spacing={4} fontSize="xs" color="gray.500">
+                              <Text>{formatDuration(file.duration || 0)}</Text>
+                              <Text>{formatFileSize(file.size)}</Text>
+                              <Text>{file.format?.toUpperCase()}</Text>
+                            </HStack>
+                          </VStack>
+                          <HStack spacing={2}>
+                            <IconButton
+                              aria-label="Play file"
+                              icon={<FiPlay />}
+                              size="sm"
+                              colorScheme="blue"
+                              onClick={() => setSelectedFile(file)}
+                              _hover={{ bg: "blue.700" }}
+                            />
                             <IconButton
                               aria-label="Delete file"
                               icon={<FiTrash2 />}
@@ -294,44 +337,10 @@ export const MusicStorage: React.FC = () => {
                               _hover={{ bg: "red.900" }}
                             />
                           </HStack>
-                        </CardHeader>
-                        <CardBody pt={0}>
-                          <VStack spacing={2} align="stretch">
-                            <Text fontWeight="bold" fontSize="sm" noOfLines={1} color="white">
-                              {file.title || file.originalName}
-                            </Text>
-                            {file.artist && (
-                              <Text fontSize="xs" color="gray.400" noOfLines={1}>
-                                {file.artist}
-                              </Text>
-                            )}
-                            {file.album && (
-                              <Text fontSize="xs" color="gray.500" noOfLines={1}>
-                                {file.album}
-                              </Text>
-                            )}
-                            <HStack justify="space-between" fontSize="xs" color="gray.500">
-                              <Text>{formatDuration(file.duration || 0)}</Text>
-                              <Text>{formatFileSize(file.size)}</Text>
-                            </HStack>
-                            {file.songId && (
-                              <Badge colorScheme="green" size="sm" alignSelf="start" bg="green.900" color="green.200">
-                                Linked to Rekordbox
-                              </Badge>
-                            )}
-                            <IconButton
-                              aria-label="Play file"
-                              icon={<FiPlay />}
-                              size="sm"
-                              colorScheme="blue"
-                              onClick={() => setSelectedFile(file)}
-                              _hover={{ bg: "blue.700" }}
-                            />
-                          </VStack>
-                        </CardBody>
-                      </Card>
+                        </HStack>
+                      </Box>
                     ))}
-                  </SimpleGrid>
+                  </VStack>
                 )}
               </VStack>
             </TabPanel>