feat(admin): add 3-dot action menus, document deletion, and company email in CSV configs
- Bookings: replace static action cell with vertical dots menu (view details modal, validate transfer, delete)
- Documents: replace download button with dots menu (download, delete) + new admin DELETE endpoint bypassing status/ownership restrictions
- CSV rates: show company email (from upload form metadata) in active configs table, fix header layout (title left, reload right, same line)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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