Centralized backup directory logic via SettingsManager.GetEffectiveBackupDir(), replacing repeated path construction throughout the codebase. Fixed backup and restore logic aborting on error, streamlined backup/restore workflows for both individual apps and bulk operations, improved UI text for clarity, improved error handling and improved progress feedback. Removed redundant code and ensured consistent backup directory usage in MainForm, Sideloader, and SettingsForm
ed17322983