Update CORS handling for web image viewing and adjust host assignment in publicFileShareHandler

b0esche_cloud/lib/widgets/file_viewer_dispatch.dart

@@ -105,8 +105,8 @@ class FileViewerDispatch {
       );
     } else if (mimeType.startsWith('image/')) {
       Widget child;
-      if (kIsWeb) {
-        // Use HTML img element for web to handle CORS
+      if (kIsWeb && token == null) {
+        // Use HTML img element for web public shares to handle CORS
         ui_web.platformViewRegistry.registerViewFactory(viewerId, (int viewId) {
           final imgElement = web.HTMLImageElement()
             ..src = url
@@ -124,7 +124,7 @@ class FileViewerDispatch {
 
         child = HtmlElementView(viewType: viewerId);
       } else {
-        // For mobile, use Image.network
+        // For mobile or authenticated web, use Image.network with headers
         child = Image.network(
           url,
           headers: headers,

go_cloud/internal/http/routes.go

@@ -2952,7 +2952,10 @@ func publicFileShareHandler(w http.ResponseWriter, r *http.Request, db *database
 	} else if r.TLS == nil {
 		scheme = "http"
 	}
-	host := "www.b0esche.cloud"
+	host := r.Host
+	if host == "" {
+		host = "go.b0esche.cloud"
+	}
 	downloadPath := fmt.Sprintf("%s://%s/public/share/%s/download?token=%s", scheme, host, token, url.QueryEscape(viewerToken))
 	viewPath := fmt.Sprintf("%s://%s/public/share/%s/view?token=%s", scheme, host, token, url.QueryEscape(viewerToken))