From 29356bd5305ee6f9805a360acbcef2649123d6c1 Mon Sep 17 00:00:00 2001
From: canglan <admin@sea-studio.top>
Date: Sun, 12 Jul 2026 13:04:58 +0800
Subject: [PATCH] fix: prevent $ interpolation in renderTemplate replacement

---
 backend/mailer.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/backend/mailer.js b/backend/mailer.js
index d91bded..de2f35e 100644
--- a/backend/mailer.js
+++ b/backend/mailer.js
@@ -35,8 +35,9 @@ function renderTemplate(template, vars) {
   let { subject, body } = template;
   for (const [k, v] of Object.entries(vars)) {
     const re = new RegExp(`\\{\\{${k}\\}\\}`, 'g');
-    subject = subject.replace(re, v || '');
-    body = body.replace(re, v || '');
+    const val = String(v ?? '');
+    subject = subject.replace(re, () => val);
+    body = body.replace(re, () => val);
   }
   return { subject, body };
 }