Function friendlyDriveMessage

friendlyDriveMessage(err: DriveError): string
Translate a DriveError to one user-safe English sentence.

Decision matrix:
- 400 → "not a Drive URL"
- 413 → "over the 100 MB limit"
- message contains "not be public" / "after confirm" → "set sharing to Anyone with the link"
- message contains "empty body" → "Drive returned empty response"
- default → "could not download from Drive, try again"
Parameters
- err: DriveError
  The DriveError to translate.
Returns string
A user-safe message string.
- Defined in src/errors/http.ts:77