FIX: saving new invoices was broken because changing a customer would only store billingData, but not a customerId

database/migrations/2025_09_18_190049_create_invoices_table.php

@@ -20,7 +20,7 @@ public function up(): void
             $table->date('service_end_date')->nullable();
             $table->boolean('is_recurring')->default(false);
             $table->boolean('is_partial_service')->default(false);
-            $table->foreignId('customer_id')->constrained()->onDelete('cascade');
+            $table->foreignId('customer_id')->nullable()->constrained()->onDelete('cascade');
             $table->string('payment_status')->default('draft');
             $table->decimal('total_amount', 10, 2);
             $table->text('title')->nullable();

resources/js/pages/Invoices.vue

@@ -111,7 +111,7 @@ const saveInvoice = async (updatedInvoice: Invoice) => {
             totalAmount: updatedInvoice.totalAmount,
             title: updatedInvoice.title,
             text: updatedInvoice.text,
-            customer: updatedInvoice.customer,
+            customerId: updatedInvoice.customer ? updatedInvoice.customer.id : null,
             billingData: {
                 companyName: updatedInvoice.billingData?.companyName,
                 vatId: updatedInvoice.billingData?.vatId,

resources/views/invoice.blade.php

@@ -77,7 +77,11 @@
             <tr>
                 <th>Rechnungs-Nr.</th>
                 <td>
+                    @if($invoice['paymentStatus'] == 'draft')
+                    Entwurf
+                    @else
                     {{ $invoice['nr'] }}
+                    @endif
                 </td>
             </tr>
             @if($invoice['customer']['customerNr'])
@@ -127,7 +131,7 @@
 
     @if($invoice['text'])
     <div class="text">
-        {{ $invoice['text'] }}
+        {!! nl2br(e($invoice['text'])) !!}
     </div>
     @endif