1.5.2

- feat: order confirmation PDF generation with VAT support
- feat: order confirmation modal with custom item editing
- fix: attendance negative duration clamping and switchProject timing
- fix: Quill editor locked to Tahoma 14px, PDF heading sizes
- fix: invoice/offer PDF font consistency (Tahoma enforcement)
- fix: invoice alert cron improvements
- fix: NAS financials manager edge cases
- refactor: numbering service with unique sequence constraints

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/services/invoices.service.ts

@@ -1,5 +1,9 @@
 import prisma from "../config/database";
 import { toCzk } from "./exchange-rates";
+import {
+  generateInvoiceNumber,
+  releaseInvoiceNumber,
+} from "./numbering.service";
 
 // Status transition rules matching PHP
 const VALID_TRANSITIONS: Record<string, string[]> = {
@@ -147,7 +151,10 @@ export async function listInvoices(params: ListInvoicesParams) {
   return { data: enriched, total, page, limit };
 }
 
-export { generateInvoiceNumber as getNextInvoiceNumberFormatted } from "./numbering.service";
+export {
+  generateInvoiceNumber as getNextInvoiceNumberFormatted,
+  previewInvoiceNumber as getNextInvoiceNumberPreview,
+} from "./numbering.service";
 
 export async function getInvoiceStats(queryMonth?: number, queryYear?: number) {
   const now = new Date();
@@ -293,9 +300,14 @@ export async function getInvoice(id: number) {
 }
 
 export async function createInvoice(body: Record<string, any>) {
+  const invoiceNumber =
+    body.invoice_number !== undefined && body.invoice_number !== null
+      ? String(body.invoice_number)
+      : (await generateInvoiceNumber()).number;
+
   const invoice = await prisma.invoices.create({
     data: {
-      invoice_number: body.invoice_number ? String(body.invoice_number) : null,
+      invoice_number: invoiceNumber,
       order_id: body.order_id ? Number(body.order_id) : null,
       customer_id: body.customer_id ? Number(body.customer_id) : null,
       status: body.status ? String(body.status) : "issued",
@@ -410,7 +422,7 @@ export async function updateInvoice(id: number, body: Record<string, any>) {
     }
   }
 
-  if (body.paid_date !== undefined)
+  if (body.paid_date !== undefined && currentStatus !== "paid")
     data.paid_date = body.paid_date ? new Date(String(body.paid_date)) : null;
 
   await prisma.invoices.update({ where: { id }, data });
@@ -441,5 +453,11 @@ export async function deleteInvoice(id: number) {
   if (!existing) return null;
 
   await prisma.invoices.delete({ where: { id } });
+
+  const year = existing.created_at
+    ? new Date(existing.created_at).getFullYear()
+    : new Date().getFullYear();
+  await releaseInvoiceNumber(year);
+
   return existing;
 }