fix: remove escaped backticks causing syntax error

app/src/utils/worldLoader.ts

@@ -12,7 +12,7 @@ export function getExternalWorld(): WorldEntry | undefined {
 
   if (modelUrl.startsWith('JYSM/')) {
     const hfId = modelUrl.slice(5)
-    finalUrl = \`https://huggingface.co/datasets/Junyueeeeee/SparkSplat_Model/resolve/main/\${hfId}\`
+    finalUrl = `https://huggingface.co/datasets/Junyueeeeee/SparkSplat_Model/resolve/main/${hfId}`
     if (!finalUrl.toLowerCase().endsWith('.ply') && !finalUrl.toLowerCase().endsWith('.spz')) {
       finalUrl += '.ply'
     }
@@ -32,8 +32,8 @@ export function getExternalWorld(): WorldEntry | undefined {
     display_name: displayName,
     assets: {
       splats: {
-        ply_url: isSpz ? undefined : \`\${finalUrl}\${finalUrl.includes('?') ? '&' : '?'}nocache=\${Date.now()}\`,
-        spz_urls: isSpz ? { full_res: \`\${finalUrl}\${finalUrl.includes('?') ? '&' : '?'}nocache=\${Date.now()}\` } : {},
+        ply_url: isSpz ? undefined : `${finalUrl}${finalUrl.includes('?') ? '&' : '?'}nocache=${Date.now()}`,
+        spz_urls: isSpz ? { full_res: `${finalUrl}${finalUrl.includes('?') ? '&' : '?'}nocache=${Date.now()}` } : {},
         semantics_metadata: { metric_scale_factor: 1, ground_plane_offset: 0, flip_y: true }
       },
       mesh: { collider_mesh_url: '' },