A guarded vector-import flow for useImportExport: a preview panel (detected-format badge, total / with-vectors / text-only counts, detected dimensions, dimension-mismatch warning, Cancel/Confirm), a phased progress bar (parsing → validating → embedding → importing), a result stats banner (imported/skipped/re-embedded counts, source format, duration), and a record-preview table for row-level sanity checks before a destructive ingest. References the cross-family FormatDetectionBadge and inlines a minimal fallback so it builds independently. Data source useImportExport.