fix(studio): a repair lands under the brush with no pill over it, and a browser with no device is not asked for one

docker/frontend/src/App.tsx

@@ -1050,7 +1050,12 @@ export function Workspace() {
     if (!engine || !previewBytes || shooting) return;
     const token = ++renderToken.current;
     const timer = setTimeout(async () => {
-      setBusy(t('act.rendering'));
+      // No spinner for this one, deliberately. The render is the page keeping up
+      // with the reader — the brush's own spots are already drawn on the layer
+      // above the photo, so the repair arriving under them a moment later is the
+      // photo catching up and not a thing being waited for. A pill saying so was
+      // read as the studio doing something to the frame (an export, a second
+      // copy), and it stayed up through a HEAL long enough to be noticed.
       try {
         // The geometry is the frame's own; only the recipe differs between the
         // render and the compare copy, so the two can never drift apart.