Polish mobile app for App Store review and expand CRUD.

Default to beenvoice.soconnor.dev with server settings hidden behind Advanced; add Entities tab with clients/businesses, invoice creation, UI fixes for dashboard layout, date fields, FAB position, and card-matched button radius.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/invoice-number.ts

@@ -0,0 +1,11 @@
+/** Matches web invoice-form default numbering. */
+export function generateInvoiceNumber(): string {
+  const date = new Date().toISOString().slice(0, 10).replace(/-/g, "");
+  return `INV-${date}-${String(Date.now()).slice(-6)}`;
+}
+
+export function defaultDueDate(issueDate: Date): Date {
+  const due = new Date(issueDate);
+  due.setDate(due.getDate() + 30);
+  return due;
+}