docker-userland-proxy-off.sh: free 解析改用 NR==2 定位数据行，兼容中文本地化输出(内存：)

docker-userland-proxy-off.sh

@@ -70,8 +70,9 @@ fi
 echo -e "${YELLOW}[状态] 当前 daemon.json 未配置 userland-proxy: false（值: ${CFG_VAL}）${NC}"
 
 # --- 3. 记录优化前内存基线 ---
-MEM_BEFORE_USED=$(free -m | awk '/^Mem:/{print $3}')
-MEM_BEFORE_AVAIL=$(free -m | awk '/^Mem:/{print $7}')
+# 注意: free -m 输出标签可能因本地化为中文("内存：")，用 NR==2 定位数据行更健壮
+MEM_BEFORE_USED=$(free -m | awk 'NR==2{print $2}')
+MEM_BEFORE_AVAIL=$(free -m | awk 'NR==2{print $7}')
 echo -e "${GREEN}[基线] 优化前内存: used ${MEM_BEFORE_USED}MB / available ${MEM_BEFORE_AVAIL}MB${NC}"
 
 # --- 4. 备份现有 daemon.json ---
@@ -131,8 +132,8 @@ else
 fi
 CONF=$(docker info 2>/dev/null | awk -F': ' '/EnableUserlandProxy/{gsub(/ /,"",$2); print $2}' | head -1)
 echo -e "${GREEN}[验证] daemon.json 配置: userland-proxy: false（docker info 字段: ${CONF:-不显示=false 时正常}）${NC}"
-MEM_AFTER_USED=$(free -m | awk '/^Mem:/{print $3}')
-MEM_AFTER_AVAIL=$(free -m | awk '/^Mem:/{print $7}')
+MEM_AFTER_USED=$(free -m | awk 'NR==2{print $2}')
+MEM_AFTER_AVAIL=$(free -m | awk 'NR==2{print $7}')
 SAVED=$((MEM_BEFORE_USED - MEM_AFTER_USED))
 echo -e "${GREEN}[内存] 优化前: used ${MEM_BEFORE_USED}MB / available ${MEM_BEFORE_AVAIL}MB${NC}"
 echo -e "${GREEN}[内存] 优化后: used ${MEM_AFTER_USED}MB / available ${MEM_AFTER_AVAIL}MB${NC}"