Function renameDatabase

apps/desktop/src/main/databases.ts:335–359

(
  root: string,
  csvRel: string,
  newTitle: string
)

 * data, schema, and pages all live inside, nothing else needs rewriting.
 */
export async function renameDatabase(
  root: string,
  csvRel: string,
  newTitle: string
): Promise<string> {
  const formDir = formDirFromCsvPath(toPosix(csvRel))
  if (!formDir) throw new Error(`Not a database folder: ${csvRel}`)
  const parentRel = formDir.includes('/') ? formDir.slice(0, formDir.lastIndexOf('/')) : ''
  const safeName = (newTitle.trim() || 'Untitled Database').replace(/[\\/:*?"<>|]/g, '-')
  const makeFormDir = (name: string): string =>
    parentRel ? `${parentRel}/${name}${FORM_DIR_SUFFIX}` : `${name}${FORM_DIR_SUFFIX}`
  let targetRel = makeFormDir(safeName)
  if (toPosix(targetRel) === toPosix(formDir)) return csvRel
  let n = 2
  for (;;) {
    try {
      await fs.access(databaseDataPath(root, targetRel))
      targetRel = makeFormDir(`${safeName} ${n++}`)
    } catch {
      break
    }
  }
  await fs.rename(databaseDataPath(root, formDir), databaseDataPath(root, targetRel))
  return csvPathForFormDir(targetRel)
}

/**
 * List databases in the vault: each `<Name>.base` folder (surfaced as its