fix: 安装启动后不再卡住，保证脚本退出

- 去掉可能阻塞的 systemctl status 全量输出
- verify 使用 connect/max 超时；安装阶段 8s 快速验证
- 验证失败只告警，不阻塞安装结束

scripts/detect.sh

@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+set -euo pipefail
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+# shellcheck source=lib.sh
+source "$ROOT_DIR/scripts/lib.sh"
+if [[ -f "${CONFIG_FILE:-$ROOT_DIR/config/settings.conf}" ]]; then
+  load_config
+else
+  CELLULAR_IFACE_PATTERNS="${CELLULAR_IFACE_PATTERNS:-wwan,wwp,usb,enx,ppp,cdc,rmnet,ccmni,mbim,qmi}"
+  REQUIRE_CELLULAR_IFACE=false
+  CELLULAR_IFACE=
+fi
+
+echo "========== 主机 =========="
+echo "hostname : $(hostname)"
+echo "kernel   : $(uname -r)"
+echo "arch     : $(uname -m)"
+echo "mem_total: $(awk '/MemTotal/ {printf "%.0f MB", $2/1024}' /proc/meminfo 2>/dev/null || echo unknown)"
+echo "mem_avail: $(awk '/MemAvailable/ {printf "%.0f MB", $2/1024}' /proc/meminfo 2>/dev/null || echo unknown)"
+echo
+
+echo "========== 接口列表 =========="
+printf '%-12s %-10s %-18s %-12s %s\n' "IFACE" "STATE" "IPv4" "DRIVER" "SCORE"
+default_if="$(detect_default_iface || true)"
+while IFS='|' read -r name state ip; do
+  [[ -z "$name" ]] && continue
+  is_virtual_or_skip_iface "$name" && continue
+  sc="$(score_iface_as_cellular "$name" "$default_if")"
+  drv="$(iface_driver "$name" || true)"
+  printf '%-12s %-10s %-18s %-12s %s\n' "$name" "$state" "${ip:-}" "${drv:-}" "$sc"
+done < <(list_ifaces)
+echo
+
+echo "========== 默认路由 =========="
+ip route show default 2>/dev/null || true
+echo
+echo "default iface: ${default_if:-none}"
+echo
+
+echo "========== 数据网卡（代理出口） =========="
+cell="$(detect_cellular_iface "${CELLULAR_IFACE:-}" 2>/dev/null || true)"
+if [[ -n "$cell" ]]; then
+  echo "CELLULAR_IFACE=$cell  ip=$(detect_source_ip "$cell" || true)  driver=$(iface_driver "$cell" || true)"
+  echo "说明: 走本代理的流量将从该网卡出（数据流量）"
+else
+  echo "未能自动探测数据网卡。"
+  echo "请手动: CELLULAR_IFACE=网卡名 或 cpxy rebind"
+  exit 2
+fi