feat(email): implement professional responsive b2b html email template

shop/app/actions/checkout.ts

@@ -8,7 +8,7 @@ import { sendMail } from '@/utils/mail';
 import { renderToBuffer } from '@react-pdf/renderer';
 import React from 'react';
 import { InvoicePDF } from '@/components/invoice-pdf';
-import { getOrderEmailTemplate, buildEmailItemsSection } from '@/lib/actions/email-templates';
+import { generateOrderEmailHtml, generateOrderEmailSubject } from '@/lib/actions/email-templates';
 
 function generateOrderNumber(prefix: 'BE' | 'AE' = 'AE'): string {
   const year = new Date().getFullYear();
@@ -147,21 +147,22 @@ async function triggerPostProcessing(orderId: string, supabase: any, customerSna
         `;
       }
 
-      const itemsSection = buildEmailItemsSection(items);
-
-      const emailTemplate = getOrderEmailTemplate({
+      const emailTemplate = generateOrderEmailHtml({
         orderNumber: order.order_number,
+        status: 'pending',
         formattedDate,
         customerCompanyName: customerSnapshot.company_name,
-        totalDetailsText,
-        totalDetailsHtml,
-        itemsDetailsText: itemsSection.text,
-        itemsDetailsHtml: itemsSection.html
-      }, `${process.env.NEXT_PUBLIC_SITE_URL || 'https://staging.hephex.de'}`, false);
+        items,
+        taxRate,
+        oneTimeNet,
+        monthlyNet,
+      });
+
+      const mailSubject = generateOrderEmailSubject(order.order_number, 'pending');
 
       await sendMail({
         to: email,
-        subject: `Anfragebestätigung ${order.order_number}`,
+        subject: mailSubject,
         text: emailTemplate.text,
         html: emailTemplate.html,
         attachments: [