Function createExcalidraw

apps/desktop/src/main/vault.ts:3020–3044

(
  root: string,
  folder: NoteFolder,
  subpath = '',
  title?: string
)

// createNote (unique title, same folder/subpath resolution) but writes the
// Excalidraw JSON instead of a Markdown stub.
export async function createExcalidraw(
  root: string,
  folder: NoteFolder,
  subpath = '',
  title?: string
): Promise<NoteMeta> {
  const base = sanitizeNoteTitle(title) || 'Untitled drawing'
  const clean = subpath.replace(/^\/+|\/+$/g, '')
  const topRoot = await folderRoot(root, folder)
  const dir = clean ? resolveSafe(topRoot, clean) : topRoot
  await fs.mkdir(dir, { recursive: true })
  let finalTitle = base
  for (let n = 2; ; n++) {
    try {
      await fs.access(path.join(dir, `${finalTitle}.excalidraw`))
      finalTitle = `${base} ${n}`
    } catch {
      break
    }
  }
  const abs = path.join(dir, `${finalTitle}.excalidraw`)
  await fs.writeFile(abs, JSON.stringify(emptyExcalidrawDocument(), null, 2), 'utf8')
  invalidateNoteMetaCache(root, toPosix(path.relative(root, abs)))
  return await readMeta(root, abs, folder)
}

/**
 * Convert an Obsidian Excalidraw markdown drawing (`*.excalidraw.md`, or a `.md`