Defining list length in Template seems to work now

backend/pdfrender/fill_capacity.go

@@ -0,0 +1,18 @@
+package pdfrender
+
+// FillToCapacity fills a slice to a specified capacity with empty items
+// This ensures tables render with the correct number of empty rows
+func FillToCapacity[T any](items []T, capacity int) []T {
+	if len(items) >= capacity {
+		return items
+	}
+
+	// Create filled slice with capacity
+	filled := make([]T, capacity)
+
+	// Copy existing items
+	copy(filled, items)
+
+	// Remaining items are already zero-valued
+	return filled
+}