An export surface for vector data — the counterpart to VectorImportFlow: a record/dimension count line, a row per export format (native JSON with vectors, CSV, JSONL — label, description, vectors-included / text-only indicator, per-format export action emitting onExport(formatId)), a busy state that disables all actions with a spinner on the active format, a zero-records disabled state, and an optional last-export banner (format, records, human-readable size, filename). Works with any backend; data source useImportExport (exportCSV, exportJSONL) plus a native JSON export.