Add Joplin, old Mac, and Fedora WiFi runbooks; simplify JA3 Whisky scripts and hotspot recovery.

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

docs/old_mac/scripts/discover-fedora.sh

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+#!/usr/bin/env bash
+# Mac: найти Fedora в сети хотспота.
+#   bash docs/old_mac/scripts/discover-fedora.sh
+set -euo pipefail
+
+SUBNET=""
+IFACE="en0"
+
+wifi_ip() {
+  ifconfig "$IFACE" 2>/dev/null | awk '/inet / {print $2; exit}'
+}
+
+IP="$(wifi_ip || true)"
+[ -n "$IP" ] || { printf 'Wi-Fi IP не найден на %s\n' "$IFACE"; exit 1; }
+
+SUBNET="$(printf '%s\n' "$IP" | awk -F. '{print $1"."$2"."$3}')"
+printf 'Mac Wi-Fi: %s (подсеть %s.0/24)\n\n' "$IP" "$SUBNET"
+
+# mDNS
+printf '%s\n' '--- mDNS ---'
+for name in fedora.local fedora; do
+  FIP=""
+  if command -v dscacheutil >/dev/null 2>&1; then
+    FIP="$(dscacheutil -q host -a name "$name" 2>/dev/null | awk '/ip_address:/ {print $2; exit}')"
+  fi
+  [ -n "$FIP" ] || FIP="$(ping -c 1 -t 1 "$name" 2>/dev/null | sed -n 's/.*(\([0-9.]*\)).*/\1/p' | head -1)"
+  if [ -n "$FIP" ]; then
+    printf '%s → %s\n' "$name" "$FIP"
+    if ping -c 1 -W 1000 "$FIP" >/dev/null 2>&1; then
+      printf '  ping: ok\n'
+    else
+      printf '  ping: FAIL (вероятна изоляция клиентов хотспота)\n'
+    fi
+    if nc -z -w 2 "$FIP" 22 2>/dev/null; then
+      printf '  ssh:22: open\n'
+    else
+      printf '  ssh:22: closed/unreachable\n'
+    fi
+    if nc -z -w 2 "$FIP" 3389 2>/dev/null; then
+      printf '  rdp:3389: open\n'
+    else
+      printf '  rdp:3389: closed/unreachable\n'
+    fi
+  fi
+done
+
+printf '%s\n' '--- ARP ---'
+arp -a 2>/dev/null | grep "$SUBNET" | grep -v 'incomplete' || true
+
+printf '%s\n' '--- Быстрый sweep (ssh:22) ---'
+FOUND=0
+for i in $(seq 1 254); do
+  T="$SUBNET.$i"
+  [ "$T" = "$IP" ] && continue
+  nc -z -G 1 -w 1 "$T" 22 2>/dev/null && printf 'ssh open: %s\n' "$T" && FOUND=1
+done
+[ "$FOUND" -eq 0 ] && printf '(ни одного ssh:22 не найдено)\n'
+
+printf '%s\n' '--- BT PAN fallback ---'
+printf 'Проверка 172.20.99.1 (Fedora BT PAN)…\n'
+if ping -c 1 -W 1000 172.20.99.1 >/dev/null 2>&1; then
+  printf '  ping 172.20.99.1: ok\n'
+else
+  printf '  ping 172.20.99.1: нет (запустите setup-bt-pan-fedora.sh на Fedora)\n'
+fi
+
+printf '\nПодсказка: если ping FAIL но mDNS есть — отключите AP isolation на телефоне\n'
+printf 'или используйте Bluetooth PAN: REMOTE_ACCESS.md §4\n'