QuoteController@recordResponse rendered
Procurement.Views.quotes.response_form, which was never created — so
/procurement/quotes/{id}/response returned a 500 and vendor prices
could not be recorded at all. Without it the whole tender cycle is
blocked: no quote totals, so no technical gate, no financial
comparison, and no award.

Fields match what storeResponse() reads: quote_item_ids[],
quantities[], unit_prices[], delivery_days[], plus delivery/payment
terms and expiry date.