fix: Q&A 등록 중지(마이그레이션 사전작업)

eng/bbs/descope_qa_write.php

@@ -45,6 +45,16 @@ try {
 $postId = isset($_GET['id']) ? (int)$_GET['id'] : 0;
 $isEdit = $postId > 0;
 
+// New Q&A submissions are closed. Block both direct form access and POST bypasses.
+if (!$isEdit) {
+    if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+        http_response_code(403);
+        exit('New Q&A submissions are currently closed.');
+    }
+    header('Location: /eng/bbs/descope_qa_list.php');
+    exit;
+}
+
 // 5) 수정 모드이면 기존 글 불러오기
 if ($isEdit) {
     $stmt = $pdo->prepare("SELECT * FROM qa_posts WHERE post_id = ?");