feat: price home delivery with Jadlog

FREIGHT_ADAPTER=jadlog prices "Receber em casa" through Jadlog's Simulador
de Frete from the order's billed metres and value, adding production days
to Jadlog's delivery time. The package weight is a base plus a weight per
metre from the client, with no default: the adapter refuses to start
without it and without the credentials. The cart re-quotes when the package
changes, and approval quotes again from the server-priced items. The
production stack takes the Jadlog settings, so the read-only probe runs
from the worker's console.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/checkout.js

@@ -81,7 +81,8 @@
     const rows = approved.items.map(item => linha(
       (MODOS[item.mode]?.tit || item.mode)+' · '+fmtM(Number(item.billed_metres))+' m', rs(item.total_cents/100)));
     const pickup = approved.freight.service === 'pickup';
-    rows.push(linha(pickup ? 'Retirada em Franca' : 'Frete',
+    const prazo = approved.freight.days ? ' · até '+approved.freight.days+' dias úteis' : '';
+    rows.push(linha(pickup ? 'Retirada em Franca' : 'Frete'+prazo,
       approved.freight.total_cents ? rs(approved.freight.total_cents/100) : 'Grátis'));
     rows.push(linha('Total', rs(approved.total_cents/100), 'tot'));
     resumo.replaceChildren(node('h4','Resumo do pedido'), ...rows);
@@ -96,17 +97,40 @@
     const session=await ready;
     return window.dtfUpload(file,{api,progress:message,scope:session.cart_scope});
   }
+  // The cart's package: billed metres and value. The charged freight is
+  // quoted again by the server from the approved items.
+  const pacote = () => {
+    const items=[...pedido,...(itemAtual?[itemAtual]:[])];
+    return {metres:items.reduce((t,it)=>t+(it.cob||0),0), cents:Math.round(items.reduce((t,it)=>t+(it.total||0),0)*100)};
+  };
+  let freightQuoted = null;
   window.dtfFreight = async () => {
     const cep = entrega.cep;
+    const service = (await ready).freight_service;
+    if (!service) {
+      $('cepMsg').textContent = 'A entrega ainda não está disponível. Escolha a retirada em Franca.';
+      return;
+    }
+    const {metres, cents} = pacote();
+    if (!metres) { $('cepMsg').textContent = 'Adicione um item ao pedido para cotar o frete.'; return; }
+    $('cepMsg').textContent = 'Cotando o frete…';
     try {
-      const result = await api('/freight',{service:'mock-standard',postal_code:cep});
+      const result = await api('/freight',{service,postal_code:cep,metres:metres.toFixed(2),declared_cents:cents});
       if (entrega.cep !== cep || entrega.tipo !== 'frete') return;
       entrega.valor = result.total_cents/100;
       entrega.cotado = true;
-      $('cepMsg').textContent = 'Frete estimado: '+rs(entrega.valor)+'.';
+      freightQuoted = JSON.stringify(pacote());
+      $('cepMsg').textContent = 'Frete: '+rs(entrega.valor)+
+        (result.days ? ' · entrega em até '+result.days+' dias úteis.' : '.');
       pintaEntrega();
     } catch(error) { $('cepMsg').textContent = error.message; }
   };
+  // A different package is a different freight: quote it again.
+  window.addEventListener('dtf-cart-changed',()=>{
+    if (entrega.tipo==='frete' && entrega.cotado && freightQuoted && freightQuoted!==JSON.stringify(pacote())) {
+      entrega.cotado=false; freightQuoted=null; window.dtfFreight();
+    }
+  });
   window.dtfCheckout = async () => {
     if (busy) return;
     // The cart that was sent goes straight to its payment; a changed cart is sent again.
@@ -135,7 +159,9 @@
             upload_id:uploads[index],...source}))},
           quality_status:item.qualityStatus,quality_acknowledged:item.qualityAcknowledged});
       }
-      const content = {customer:{...cliente},items,freight:{service:entrega.tipo==='retira'?'pickup':'mock-standard',postal_code:entrega.tipo==='retira'?'':entrega.cep}};
+      const service = entrega.tipo==='retira' ? 'pickup' : (await ready).freight_service;
+      if (!service) throw new Error('A entrega ainda não está disponível. Escolha a retirada em Franca.');
+      const content = {customer:{...cliente},items,freight:{service,postal_code:entrega.tipo==='retira'?'':entrega.cep}};
       const destination = destinoApi();
       if (destination) content.destination = destination;
       if (cartSnapshot()!==initialCart) throw new Error('O carrinho mudou durante o envio. Confira os itens e envie de novo.');