Function handleDropOnFolder

public/js/folderManager.js:2257–2454

(event, dropFolder)

   Handle drop (files or folders)
----------------------*/
function handleDropOnFolder(event, dropFolder) {
  event.preventDefault();
  event.currentTarget?.classList?.remove("drop-hover");

  let dragData = null;
  try {
    const jsonStr = event.dataTransfer.getData("application/json") || "";
    if (jsonStr) dragData = JSON.parse(jsonStr);
  } catch (e) {
    dragData = null;
  }

  // --- NEW: folder drag coming from the inline file list (JSON payload) ---
  if (dragData && dragData.dragType === 'folder' && dragData.folder) {
    const sourceFolder = String(dragData.folder || "").trim();
    if (!sourceFolder || sourceFolder === "root") return;
    const sourceId = String(dragData.sourceId || dragData.sourceSourceId || '').trim();
    const destSourceId = getActiveSourceId();
    const crossSource = sourceId && destSourceId && sourceId !== destSourceId;

    // prevent moving into self/descendant
    if (!crossSource && (dropFolder === sourceFolder || (dropFolder + "/").startsWith(sourceFolder + "/"))) {
      showToast(t('invalid_destination'), 4000, 'warning');
      return;
    }

    runTransferJob({
      kind: 'folder_move',
      payload: {
        source: sourceFolder,
        destination: dropFolder,
        sourceId,
        destSourceId
      },
      progress: {
        action: 'Moving',
        itemCount: 1,
        itemLabel: 'folder',
        bytesKnown: false,
        indeterminate: true,
        source: sourceFolder,
        destination: dropFolder
      }
    })
      .then(async () => {
        showToast(buildMoveFolderSuccessToast(sourceFolder, dropFolder), 'success');
        if (crossSource) {
          try {
            if (sourceFolder) {
              const srcParent = getParentFolder(sourceFolder);
              window.dispatchEvent(new CustomEvent('folderStatsInvalidated', {
                detail: { folders: [srcParent], sourceId }
              }));
            }
            if (dropFolder) {
              window.dispatchEvent(new CustomEvent('folderStatsInvalidated', {
                detail: { folders: [dropFolder], sourceId: destSourceId }
              }));