Get dialog title
Estimate exported row count
Check if sampling needs a count input
Check if sampling needs an interval input
Get sampling description
Check if show sampling options
Get total row count
Get format info for display
Handle cancel button
Handle export button
Export dialog component with progressive UX Provides format selection, sampling options, and export preview
Usage: <mj-export-dialog [visible]="showExportDialog" [config]="exportConfig" (closed)="onExportDialogClosed($event)">