Phase7: Void/Refund logic

src/lib/email.ts

@@ -1261,10 +1261,12 @@ export async function sendCreditNoteEmail(params: {
   const safeNumberINV = escapeHtml(params.invoiceNumber);
   const safeReason = params.reason ? escapeHtml(params.reason) : null;
 
-  // Red accent (#DC2626) for the credit-note emails, mirroring the
-  // PDF accent so the document family reads visually consistent.
-  // The invoice email uses emerald; the credit note uses red.
-  const ACCENT = "#DC2626";
+  // PieCed brand emerald — same accent the invoice email uses.
+  // A credit note is still a PieCed IT document; the company
+  // identity stays consistent across the document family. The
+  // doc type is distinguished by the subject line and copy, not
+  // by colour.
+  const ACCENT = "#10B981";
 
   try {
     await getTransporter().sendMail({