Function syncTreeAfterFolderMove

public/js/folderManager.js:2188–2252

(sourceFolder, destination)

   Used by modal / inline moves so tree + selection stay in sync.
----------------------*/
export async function syncTreeAfterFolderMove(sourceFolder, destination) {
  if (!sourceFolder || !destination) return;

  const base = sourceFolder.split('/').pop();
  const newPath = (destination === 'root' ? '' : destination + '/') + base;

  // carry color (best-effort)
  await carryFolderColor(sourceFolder, newPath);

  // migrate expansion state + keep parents open
  migrateExpansionStateOnMove(sourceFolder, newPath, [destination, getParentFolder(destination)]);

  const srcParent = getParentFolder(sourceFolder);
  const dstParent = destination;

  // clear caches so icons/chevrons/counts are recomputed
  invalidateFolderCaches(srcParent);
  invalidateFolderCaches(dstParent);
  clearPeekCache([srcParent, dstParent, sourceFolder, newPath]);

  // re-render src + dest ULs incrementally
  const srcUl = getULForFolder(srcParent);
  const dstUl = getULForFolder(dstParent);

  if (srcUl) {
    srcUl._renderedOnce = false;
    srcUl.innerHTML = '';
    await ensureChildrenLoaded(srcParent, srcUl);
  }
  if (dstUl) {
    dstUl._renderedOnce = false;
    dstUl.innerHTML = '';
    await ensureChildrenLoaded(dstParent, dstUl);
  }

  // dest definitely has a child now → chevron on
  updateToggleForOption(dstParent, true);
  ensureFolderIcon(dstParent);

  // source may have lost its last child → recompute
  const _srcUlLive = getULForFolder(srcParent);
  updateToggleForOption(
    srcParent,
    !!(_srcUlLive && _srcUlLive.querySelector(':scope > li.folder-item'))
  );

  // restore any open branches we had saved
  await expandAndLoadSavedState();

  // update currentFolder + sticky lastOpened
  if (window.currentFolder === sourceFolder) {
    window.currentFolder = newPath;
  } else if (window.currentFolder && window.currentFolder.startsWith(sourceFolder + '/')) {
    const suffix = window.currentFolder.slice(sourceFolder.length); // includes leading '/'
    window.currentFolder = newPath + suffix;
  }
  setLastOpenedFolder(window.currentFolder || newPath);