e0fa6230ab
Implements the hook introduced by koreader/koreader#15240, called when the user deletes the plugin via the plugin manager with "Also delete plugin settings" checked. Removes the readest_sync entry from G_reader_settings (auth tokens, user info, auto_sync flag, last_sync_at) and resets the in-memory copy to defaults. Closes #4039 Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>