Add status progress for batch tool operations

src/tools/plecUpload.ts

@@ -101,11 +101,13 @@ async function handleUpload(panel: vscode.WebviewPanel, rows: UploadRow[]) {
   for (let i = 0; i < valid.length; i++) {
     const r = valid[i];
     const idx = i + 1;
+    panel.webview.postMessage({ type: 'status', message: `Preparing ${idx}/${valid.length} ${path.basename(r.path)}` });
     const buf = fs.readFileSync(r.path);
     const file = new File([buf], stampedNames[i], { type: 'text/html' });
     form.append(`fileUpload_${idx}`, file as any);
     form.append(`iterationNameUpload_${idx}`, encodeURI(r.iteration.replace(/\s+/g, '')));
   }
+  panel.webview.postMessage({ type: 'status', message: `Uploading ${valid.length} file${valid.length === 1 ? '' : 's'}...` });
 
   let res: Response;
   try {