Add DOCX viewer support in public file viewer

b0esche_cloud/lib/pages/public_file_viewer.dart

@@ -27,6 +27,7 @@ class _PublicFileViewerState extends State<PublicFileViewer> {
   Map<String, dynamic>? _fileData;
   VideoPlayerController? _videoController;
   String? _videoViewType;
+  String? _docxViewType;
 
   @override
   void initState() {
@@ -54,6 +55,15 @@ class _PublicFileViewerState extends State<PublicFileViewer> {
       if (_isVideoFile()) {
         await _initializeVideoPlayer();
       }
+
+      // Register DOCX viewer if it's a document file
+      if (_isDocumentFile()) {
+        final url = _fileData?['viewUrl'] ?? _fileData?['downloadUrl'];
+        if (url != null) {
+          _docxViewType = 'public-docx-viewer-${widget.token.hashCode}';
+          _registerDocxViewFactory(url);
+        }
+      }
     } catch (e) {
       setState(() {
         _error = 'This link is invalid or has expired.';
@@ -108,6 +118,29 @@ class _PublicFileViewerState extends State<PublicFileViewer> {
     });
   }
 
+  void _registerDocxViewFactory(String docxUrl) {
+    ui_web.platformViewRegistry.registerViewFactory(_docxViewType!, (
+      int viewId,
+    ) {
+      final iframeElement = web.HTMLIFrameElement()
+        ..src =
+            'https://docs.google.com/viewer?url=${Uri.encodeComponent(docxUrl)}&embedded=true'
+        ..style.width = '100%'
+        ..style.height = '100%'
+        ..style.border = 'none';
+
+      iframeElement.onError.listen((event) {
+        if (mounted) {
+          setState(() {
+            _error = 'Document could not be loaded. Please download the file.';
+          });
+        }
+      });
+
+      return iframeElement;
+    });
+  }
+
   String? _getViewUrl() {
     return _fileData?['viewUrl'] ?? _fileData?['downloadUrl'];
   }
@@ -229,6 +262,15 @@ class _PublicFileViewerState extends State<PublicFileViewer> {
         ),
       );
     } else if (_isDocumentFile()) {
+      if (kIsWeb && _docxViewType != null) {
+        // Use Google Docs viewer for web
+        return Expanded(
+          child: Container(
+            color: Colors.white,
+            child: HtmlElementView(viewType: _docxViewType!),
+          ),
+        );
+      } else {
         return Expanded(
           child: Center(
             child: Column(
@@ -258,6 +300,7 @@ class _PublicFileViewerState extends State<PublicFileViewer> {
             ),
           ),
         );
+      }
     } else {
       return Expanded(
         child: Center(