Admin LiveView for managing CSV product imports.
Supports multiple CSV formats (Shopify, Prom.ua, etc.) via the ImportFormat behaviour. Format is auto-detected from file headers after upload.
Features:
- Multi-step import wizard with format-aware steps
- File upload with drag-and-drop
- Option mapping UI for formats that require it (e.g. Shopify)
- Direct import for formats that don't (e.g. Prom.ua)
- Import history table with statistics
- Real-time progress tracking via PubSub
- Retry failed imports