- Two-panel layout (290px left + * right) following PermissionsView pattern
- Left panel: people picker with autocomplete list + removable user pills, site picker button, scan option checkboxes, run/cancel/export buttons
- Right panel: 3-card summary banner (TotalAccessCount, SitesCount, HighPrivilegeCount), filter TextBox, group-by ToggleButton, color-coded DataGrid
- DataGrid: color-coded rows by AccessType (Direct=blue, Group=green, Inherited=gray), warning icon for high privilege, Guest badge for external users, access type icons
- GroupStyle with Expander headers showing group name + item count
- Status bar with ProgressBar + StatusMessage
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