Variables resolved in the web live editor

Co-Authored-By: Claude Opus 5.5 <[email protected]>

Frontend/src/Api.js

@@ -262,6 +262,13 @@ export async function UploadFileChunked(RootName, RelativePath, File, OnProgress
   return CompleteChunkedUpload(RootName, RelativePath, UploadId, TotalChunks, File.name);
 }
 
+// Where each variable (portal, definition, loop) is in Content, and what it
+// resolves to: the live editor shows the results in place (LivePreview.js).
+export function FetchSpans(RootName, RelativePath, Content) {
+  const Params = new URLSearchParams({ Root: RootName, Path: RelativePath });
+  return FetchJson(`/file/spans?${Params}`, { method: "POST", ...JsonBody({ Content }) });
+}
+
 export function SaveFile(RootName, RelativePath, Content) {
   const Params = new URLSearchParams({ Root: RootName, Path: RelativePath });
   return FetchJson(`/file?${Params}`, { method: "PUT", body: Content });