feat(privacy): add referrer meta tag to prevent information leakage

AldenWangExis · AldenWangExis · commit e50b64d6d3d2 · 2025-11-13T20:07:40.000+08:00
Add &lt;meta name="referrer" content="never"&gt; to document head
for enhanced privacy protection and hotlink bypass capability.

This prevents browsers from sending HTTP Referer headers when
loading external resources, particularly useful for:
- Displaying images from platforms with referrer-based hotlink protection
- Reducing information leakage to third-party servers
- Enhancing user privacy

Implements W3C Referrer Policy specification.
diff --git a/_includes/head.html b/_includes/head.html
@@ -1,5 +1,6 @@
 <head>
   <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+  <meta name="referrer" content="never">
   <meta name="theme-color" media="(prefers-color-scheme: light)" content="#f7f7f7">
   <meta name="theme-color" media="(prefers-color-scheme: dark)" content="#1b1b1e">
   <meta name="mobile-web-app-capable" content="yes">
