fix: avoid empty tables

src/detect_section_selector_masters/sendDiffToGoogleSheets.ts

@@ -42,6 +42,21 @@ async function uploadAllToSheets() {
       .filter(f => f.endsWith('.json'))
       .map(f => ({ subdir, file: f, path: join(d, f) }));
   });
+  // Filter out empty JSON files
+  const uploadFiles: Array<{subdir: string; file: string; path: string; data: any[]}> = [];
+  for (const fObj of files) {
+    const raw = readFileSync(fObj.path, 'utf-8');
+    const data = JSON.parse(raw);
+    if (Array.isArray(data) && data.length === 0) {
+      console.log(`🚫 Skipping empty file ${fObj.file}`);
+    } else {
+      uploadFiles.push({ ...fObj, data });
+    }
+  }
+  if (!uploadFiles.length) {
+    console.log('No non-empty JSON files to upload');
+    return;
+  }
 
   // Fetch existing sheet names
   const { data: spreadsheet } = await sheets.spreadsheets.get({ spreadsheetId });
@@ -55,9 +70,9 @@ async function uploadAllToSheets() {
   // Track existing titles (only first sheet remains)
   const existing: string[] = [sheetsArr[0]?.properties?.title || ''];
 
-  // Rename the remaining sheet to match the first file (if any)
-  if (files.length > 0) {
-    const firstName = files[0].file.replace(/\.json$/, '');
+  // Rename the remaining sheet to match the first non-empty file
+  if (uploadFiles.length > 0) {
+    const firstName = uploadFiles[0].file.replace(/\.json$/, '');
     const firstSheetId = sheetsArr[0].properties?.sheetId!;
     if (existing[0] !== firstName) {
       await sheets.spreadsheets.batchUpdate({
@@ -70,14 +85,7 @@ async function uploadAllToSheets() {
     existing[0] = firstName;
   }
 
-  for (const { subdir, file, path } of files) {
-    // Read and skip empty JSON
-    const fileRaw = readFileSync(path, 'utf-8');
-    const fileData = JSON.parse(fileRaw);
-    if (Array.isArray(fileData) && fileData.length === 0) {
-      console.log(`🚫 Skipping empty file ${file}`);
-      continue;
-    }
+  for (const { subdir, file, path, data: fileData } of uploadFiles) {
     // Use file name (without extension) as sheetName
     const sheetName = file.replace(/\.json$/, '');
     if (!existing.includes(sheetName)) {