Fix deploy webhook: set HOME for git pull in shell_exec

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

deploy.php

@@ -40,8 +40,8 @@ if ($ref !== 'refs/heads/main') {
     die('Ignored: not main branch.');
 }
 
-// Run git pull
-$output = shell_exec('cd /var/www/html && git pull 2>&1');
+// Run git pull (HOME must be set explicitly since PHP's shell_exec doesn't inherit it)
+$output = shell_exec('HOME=/var/www cd /var/www/html && git pull 2>&1');
 
 http_response_code(200);
 header('Content-Type: text/plain');