fix: external drag and drop more then one file into the filemanager

[cehter]

Summary

• The error occurred directly in the file manager, not in the upload dialogue.
• External drag-and-drop of more than one file did not work. Only the first file in the array was added.

Fix

Claude Code made me aware of the fact that the webkitGetAsEntry()/getAsFile() calls are not working after the first await. The data has to be collected before the asynchronous scanFiles call.

const entries = fileItems.map((item) => ({
  entry: (item as any).webkitGetAsEntry?.(),
  file: item.getAsFile(),
}));

Tests

• vitest: Test files - 2 passed, Tests - 20 passed