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

app/services/invoice/i18n.ts

@@ -5,6 +5,10 @@ export type InvoiceLanguage = "de" | "en";
 export interface InvoiceStrings {
   invoice: string;
   stornoInvoice: string;
+  offer: string;
+  offerNumber: string;
+  offerDate: string;
+  offerValidUntil: (until: string) => string;
   stornoReference: (originalNumber: string) => string;
   invoiceNumber: string;
   invoiceDate: string;
@@ -53,6 +57,10 @@ export interface InvoiceStrings {
 const de: InvoiceStrings = {
   invoice: "Rechnung",
   stornoInvoice: "Stornorechnung",
+  offer: "Angebot",
+  offerNumber: "Angebots-Nr.",
+  offerDate: "Angebotsdatum",
+  offerValidUntil: (d) => `Dieses Angebot ist gültig bis ${d}.`,
   stornoReference: (n) => `Storno zu Rechnung Nr. ${n}`,
   invoiceNumber: "Rechnungs-Nr.",
   invoiceDate: "Rechnungsdatum",
@@ -106,6 +114,10 @@ const de: InvoiceStrings = {
 const en: InvoiceStrings = {
   invoice: "Invoice",
   stornoInvoice: "Cancellation invoice",
+  offer: "Offer",
+  offerNumber: "Offer no.",
+  offerDate: "Offer date",
+  offerValidUntil: (d) => `This offer is valid until ${d}.`,
   stornoReference: (n) => `Cancels invoice no. ${n}`,
   invoiceNumber: "Invoice no.",
   invoiceDate: "Invoice date",