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/admin/pages/InvoiceDetail.tsx

@@ -785,9 +785,8 @@ export default function InvoiceDetail() {
 
     setSaving(true);
     try {
-      const payload = {
+      const payload: any = {
         ...form,
-        invoice_number: invoiceNumber,
         items: items
           .filter((i) => i.description.trim())
           .map((item, i) => ({
@@ -795,6 +794,7 @@ export default function InvoiceDetail() {
             position: i,
           })),
       };
+      if (isEdit) payload.invoice_number = invoiceNumber;
 
       const url = isEdit
         ? `${API_BASE}/invoices/${id}`
@@ -1416,19 +1416,12 @@ export default function InvoiceDetail() {
                 <input
                   type="text"
                   value={invoiceNumber}
-                  onChange={(e) => {
-                    if (!isEdit) setInvoiceNumber(e.target.value);
-                  }}
+                  readOnly
                   className="admin-form-input"
-                  readOnly={isEdit}
-                  style={
-                    isEdit
-                      ? {
-                          backgroundColor: "var(--bg-secondary)",
-                          cursor: "default",
-                        }
-                      : undefined
-                  }
+                  style={{
+                    backgroundColor: "var(--bg-secondary)",
+                    cursor: "default",
+                  }}
                 />
               </FormField>
               <FormField label="Odběratel" error={errors.customer_id} required>