diff --git a/scripts/update.sh b/scripts/update.sh
index 5788648..c4350f7 100755
--- a/scripts/update.sh
+++ b/scripts/update.sh
@@ -515,18 +515,24 @@ if grep -q 'bugcollect-service:' "$ROOT_DIR/docker-compose.yml" 2>/dev/null; the
   _mysql_ctr="$(docker ps --filter name=mysql --filter status=running --format '{{.Names}}' 2>/dev/null | head -1)"
   if [ -n "$_mysql_ctr" ]; then
     _bc_db="${BUGCOLLECT_DB:-xuqm_bugcollect}"
-    _mysql_root_pw="$(grep '^MYSQL_ROOT_PASSWORD=' "$ROOT_DIR/config/secrets.env" 2>/dev/null | cut -d= -f2-)"
-    _mysql_user="$(grep '^MYSQL_USERNAME=' "$ROOT_DIR/config/secrets.env" 2>/dev/null | cut -d= -f2-)"
-    [ -z "$_mysql_user" ] && _mysql_user="$(grep '^MYSQL_USER=' "$ROOT_DIR/config/secrets.env" 2>/dev/null | cut -d= -f2-)"
+    _secrets="$ROOT_DIR/config/secrets.env"
+    _mysql_root_pw="$(grep '^MYSQL_ROOT_PASSWORD=' "$_secrets" 2>/dev/null | cut -d= -f2-)"
+    _mysql_user="$(grep '^MYSQL_USERNAME=' "$_secrets" 2>/dev/null | cut -d= -f2-)"
+    [ -z "$_mysql_user" ] && _mysql_user="$(grep '^MYSQL_USER=' "$_secrets" 2>/dev/null | cut -d= -f2-)"
+    info "建库检查: container=${_mysql_ctr} db=${_bc_db} user=${_mysql_user}"
     if [ -n "$_mysql_root_pw" ] && [ -n "$_mysql_user" ]; then
-      docker exec "$_mysql_ctr" mysql -u root -p"${_mysql_root_pw}" -e \
+      _db_init_err="$(docker exec "$_mysql_ctr" mysql -u root -p"${_mysql_root_pw}" -e \
         "CREATE DATABASE IF NOT EXISTS \`${_bc_db}\` CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
          GRANT ALL PRIVILEGES ON \`${_bc_db}\`.* TO '${_mysql_user}'@'%';
-         FLUSH PRIVILEGES;" 2>/dev/null \
-        && ok "数据库 ${_bc_db} 已就绪" \
-        || warn "数据库 ${_bc_db} 初始化失败，请手动执行 GRANT"
+         FLUSH PRIVILEGES;" 2>&1)"
+      if [ $? -eq 0 ]; then
+        ok "数据库 ${_bc_db} 已就绪"
+      else
+        warn "数据库 ${_bc_db} 初始化失败，请手动执行 GRANT"
+        warn "  错误: ${_db_init_err}"
+      fi
     else
-      warn "无法读取 MySQL root 密码或用户名，请手动创建 ${_bc_db} 数据库并授权"
+      warn "无法读取 MySQL root 密码或用户名（secrets.env 中未找到 MYSQL_ROOT_PASSWORD / MYSQL_USERNAME），请手动创建 ${_bc_db} 数据库并授权"
     fi
   else
     warn "MySQL 容器未运行（external 模式），请确保数据库 ${BUGCOLLECT_DB:-xuqm_bugcollect} 已存在并授权"