Make scheduling and dates timezone-safe

apps/mobile/lib/format.ts

@@ -1,3 +1,5 @@
+import { formatCalendarDate } from "@beenvoice/domain/time-zone";
+
 export function formatCurrency(amount: number, currency = "USD") {
   return new Intl.NumberFormat("en-US", {
     style: "currency",
@@ -7,7 +9,7 @@ export function formatCurrency(amount: number, currency = "USD") {
 }
 
 export function formatDate(date: Date | string) {
-  return new Date(date).toLocaleDateString("en-US", {
+  return formatCalendarDate(date, {
     month: "short",
     day: "numeric",
     year: "numeric",
@@ -15,7 +17,7 @@ export function formatDate(date: Date | string) {
 }
 
 export function formatShortDate(date: Date | string) {
-  return new Date(date).toLocaleDateString("en-US", {
+  return formatCalendarDate(date, {
     month: "short",
     day: "numeric",
   });

apps/mobile/lib/invoice-number.ts

@@ -1,3 +1,5 @@
+import { addCalendarDays } from "@beenvoice/domain/time-zone";
+
 /** Matches web invoice-form default numbering. */
 export function generateInvoiceNumber(now = new Date()): string {
   const date = [
@@ -10,7 +12,5 @@ export function generateInvoiceNumber(now = new Date()): string {
 }
 
 export function defaultDueDate(issueDate: Date): Date {
-  const due = new Date(issueDate);
-  due.setDate(due.getDate() + 30);
-  return due;
+  return addCalendarDays(issueDate, 30);
 }

apps/mobile/lib/invoice-status.ts

@@ -6,11 +6,16 @@ export type InvoiceStatus = EffectiveInvoiceStatus;
 export function getInvoiceStatus(invoice: {
   status: string;
   dueDate: Date | string;
+  createdBy?: { timeZone: string } | null;
 }): InvoiceStatus {
   if (invoice.status === "paid" || invoice.status === "draft") {
     return invoice.status;
   }
-  return getEffectiveInvoiceStatus("sent", invoice.dueDate);
+  return getEffectiveInvoiceStatus(
+    "sent",
+    invoice.dueDate,
+    invoice.createdBy?.timeZone ?? "America/New_York",
+  );
 }
 
 export const statusLabels: Record<InvoiceStatus, string> = {