fix: pass mediaType and blobUrl props to BlossomViewer

The --type flag for blossom blob command was being parsed correctly but
the mediaType and blobUrl props were not forwarded from WindowRenderer
to BlossomViewer, causing the preview to always show "preview not available".

https://claude.ai/code/session_018edX9kUcEudJzwuFCGh1xf

src/components/WindowRenderer.tsx

@@ -230,6 +230,8 @@ export function WindowRenderer({ window, onClose }: WindowRendererProps) {
             sourceUrl={window.props.sourceUrl}
             targetServer={window.props.targetServer}
             sha256={window.props.sha256}
+            blobUrl={window.props.blobUrl}
+            mediaType={window.props.mediaType}
           />
         );
         break;