Fix audio player bar height: center it instead of expanding

b0esche_cloud/lib/pages/public_file_viewer.dart

@@ -55,7 +55,13 @@ class _PublicFileViewerState extends State<PublicFileViewer> {
 
       // Initialize video controller if it's a video file
       if (_isVideoFile()) {
-        _initializeVideoPlayer();
+        try {
+          await _initializeVideoPlayer();
+        } catch (e) {
+          setState(() {
+            _error = 'Video format not supported in browser. Please download the file.';
+          });
+        }
       }
     } catch (e) {
       setState(() {
@@ -181,9 +187,11 @@ class _PublicFileViewerState extends State<PublicFileViewer> {
         ),
       );
     } else if (_isAudioFile()) {
-      return AudioPlayerBar(
-        fileName: _fileData!['fileName'] ?? 'Audio',
-        fileUrl: viewUrl,
+      return Center(
+        child: AudioPlayerBar(
+          fileName: _fileData!['fileName'] ?? 'Audio',
+          fileUrl: viewUrl,
+        ),
       );
     } else if (_isDocumentFile()) {
       return Expanded(