Add batch number to customer invoice header

src/main.rs

@@ -224,6 +224,7 @@ struct IndexTemplate {
 #[template(path = "customer.html")]
 struct CustomerTemplate {
     customer: PreparedCustomer,
+    batch_number: String,
     period: String,
     generated_date: String,
 }
@@ -306,6 +307,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         let prepared = PreparedCustomer::from_customer(customer);
         let customer_html = CustomerTemplate {
             customer: prepared,
+            batch_number: batch_number.clone(),
             period: period.clone(),
             generated_date: generated_date.clone(),
         }

templates/customer.html

@@ -142,7 +142,7 @@
         <div class="header">
             <div>
                 <h1>Fakturaunderlag - Kund {{ customer.customer_number }}</h1>
-                <div>Period: {{ period }}</div>
+                <div>Batch: {{ batch_number }} | Period: {{ period }}</div>
             </div>
             <div class="meta">
                 <div>Genererad: {{ generated_date }}</div>