The sheet printed Departure/Arrival Station as booking-level constants and
squeezed the footer figures into unrelated table columns (gross weight under
Cargo Name, full/empty under Wagon No.).
Stations now resolve per row from the slot's own board/alight yard, falling
back to the schedule's origin/destination and then the booking yards —
mirroring buildExportLoadListHtml's leg-slot handling.
The paper form's footer becomes its own tile block: In Total Wagon No., Tare
Weight, Load Capacity, Gross Weight, Equated Length, Full Wagon, Empty Wagon,
Total Amount. Rendered as .tile so buildTabularFallbackPdf still prints every
figure where Chromium is absent.
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