feat(offers): generate Angebot/Offer PDFs for draft orders

app/services/invoice/composeInvoice.ts

@@ -28,6 +28,14 @@ interface ComposeArgs {
   storno?: { cancelsNumber: string };
   /** Optional override for invoice/delivery date (defaults to order date). */
   issueDate?: Date;
+  /**
+   * When true, render as an Angebot/Offer instead of an invoice:
+   * - `kind = "offer"`
+   * - no payment-due date (the dueDate field is repurposed by the renderer
+   *   as the offer's validity expiry).
+   * - GiroCode and payment-terms text are suppressed.
+   */
+  offer?: boolean;
 }
 
 export function composeInvoice({
@@ -37,6 +45,7 @@ export function composeInvoice({
   forceLanguage,
   storno,
   issueDate,
+  offer,
 }: ComposeArgs): InvoiceViewModel {
   const language = forceLanguage
     ?? pickLanguage(order.customer?.locale ?? settings.defaultLanguage);
@@ -51,9 +60,13 @@ export function composeInvoice({
 
   const invoiceDate = issueDate ?? new Date(order.processedAt ?? order.createdAt);
   const deliveryDate = invoiceDate;
-  const dueDate = !storno && settings.paymentTermDays > 0
-    ? addDays(invoiceDate, settings.paymentTermDays)
-    : undefined;
+  // For offers we treat `dueDate` as the offer's validity expiry (default 30
+  // days from issue). The PDF renderer renders a different label.
+  const dueDate = offer
+    ? addDays(invoiceDate, 30)
+    : !storno && settings.paymentTermDays > 0
+      ? addDays(invoiceDate, settings.paymentTermDays)
+      : undefined;
 
   const paid = (order.displayFinancialStatus || "").toUpperCase() === "PAID";
 
@@ -80,7 +93,7 @@ export function composeInvoice({
   return {
     language,
     currency: order.currencyCode,
-    kind: storno ? "storno" : "invoice",
+    kind: storno ? "storno" : offer ? "offer" : "invoice",
     number: invoiceNumber,
     cancelsNumber: storno?.cancelsNumber,
     invoiceDate,