fix: improve Reality compatibility for v2rayN/Xray clients

Add empty short_id, SpiderX in share links, and post-keygen render reminder so server config stays in sync with .env.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/generate-keys.sh

@@ -67,6 +67,9 @@ if [[ -f "$ENV_FILE" ]]; then
     echo "PANEL_USERNAME=dekun" >> "$ENV_FILE"
   fi
   echo "已写入 $ENV_FILE"
+  echo ""
+  echo "重要: 密钥已变更，必须重新生成 sing-box 配置并重启："
+  echo "  python3 ${ROOT_DIR}/scripts/render-server.py && systemctl restart sing-box"
 else
   echo "提示: 先复制 .env.example 为 .env 并填写 VPS_IP、DOMAIN 等，再重新运行本脚本" >&2
 fi