fix: don't engage fullscreen

src/components/SVGContent.svelte

@@ -111,6 +111,7 @@
         return panning;
       },
       onDoubleClick: () => {
+        return; // TODO WHY BLACK?!
         if (!document.fullscreenElement) {
           console.debug("[SVG] Fullscreen requested.");
           document.body.requestFullscreen();