- Add UserCardImport model (stores imported card names as JSON) - Create card_import_schemas.py with request/response models - Create card_import.py router with import/get/delete endpoints - Add Alembic migration 004 (user_card_imports table) - Fuzzy matching for card name matching (60% threshold) - Integration with deckbuilding via imported cards - Endpoints: GET /api/v1/card-import/status, POST /, DELETE /, GET /summary