show message when frame captured

src/App.jsx

@@ -921,7 +921,8 @@ const App = memo(() => {
       return;
     }
     try {
-      await captureFrame(customOutDir, filePath, videoRef.current, currentTimeRef.current, captureFormat);
+      const outPath = await captureFrame(customOutDir, filePath, videoRef.current, currentTimeRef.current, captureFormat);
+      toast.fire({ icon: 'success', title: `Screenshot captured to: ${outPath}` });
     } catch (err) {
       console.error(err);
       errorToast('Failed to capture frame');

src/capture-frame.js

@@ -26,5 +26,6 @@ export default async function captureFrame(customOutDir, filePath, video, curren
   const outPath = getOutPath(customOutDir, filePath, `${time}.${ext}`);
   await fs.writeFile(outPath, buf);
   const offset = -video.duration + currentTime;
-  return transferTimestampsWithOffset(filePath, outPath, offset);
+  await transferTimestampsWithOffset(filePath, outPath, offset);
+  return outPath;
 }