fix: improve watchdog reliability

setup_cups.sh

@@ -1180,6 +1180,7 @@ PING_TARGETS="$ping_targets"
 FAIL_THRESHOLD=3
 DHCP_AFTER_FAILURE=1
 LOG_FILE="/var/log/cups-watchdog/network.log"
+MAX_LOG_SIZE_KB=256
 EOF
         chmod 600 "$config_dir/network-watchdog.conf"
     else
@@ -1197,6 +1198,7 @@ COMMAND_TIMEOUT=8
 FAIL_THRESHOLD=2
 RESTART_COOLDOWN=60
 LOG_FILE="/var/log/cups-watchdog/print.log"
+MAX_LOG_SIZE_KB=256
 EOF
         chmod 600 "$config_dir/print-watchdog.conf"
     else
@@ -1531,7 +1533,7 @@ main() {
     success "Avahi 服务已启动并设置开机自启"
 
     # 8. 安装守护脚本
-    install_watchdogs
+    install_watchdogs || warn "守护脚本安装失败，请稍后重新运行安装脚本或手动检查 watchdog 目录"
 
     # 更新IP地址（如果配置了静态IP）
     LOCAL_IP=$(get_ip)
@@ -1577,6 +1579,9 @@ main() {
         echo -e "  ${GREEN}          ${NC} 配置目录: /etc/cups-watchdog/"
         echo -e "  ${GREEN}          ${NC} 日志目录: /var/log/cups-watchdog/"
         echo ""
+    else
+        echo -e "  ${YELLOW}[守护脚本]${NC} 未检测到已启用状态，请检查安装日志"
+        echo ""
     fi
     echo -e "  ${YELLOW}下一步:${NC}"
     echo "  1. 用浏览器打开上面的地址"