feat: issue #9 — лог установки в ~/.config/ai-setup/setup.log

- setup.sh: функция _log(), вызов при каждом пункте меню
- scripts/ru-bypass.sh, ks-on.sh, ks-off.sh: пишут события в лог через USER_HOME
- setup.sh item 5: показывает tail -10 лога в «Последние события»
- USER_HOME передаётся через sudo env в ks-on/ks-off/ru-bypass

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

setup.sh

@@ -8,6 +8,10 @@ YEL='\033[0;33m'
 GRY='\033[0;37m'
 CLR='\033[0m'
 
+mkdir -p "$HOME/.config/ai-setup"
+LOG="$HOME/.config/ai-setup/setup.log"
+_log() { printf '%s [%s] %s\n' "$(date '+%Y-%m-%d %H:%M:%S')" "$1" "$2" >> "$LOG"; }
+
 echo ""
 echo -e "${BLD}=== AI Setup ===${CLR}"
 echo ""
@@ -44,6 +48,8 @@ echo -n "Выбери [1-7] или Enter для выхода: "
 read -r choice
 echo ""
 
+[ -n "$choice" ] && _log "setup" "Пункт $choice на $(hostname)"
+
 case "$choice" in
   1)
     bash scripts/ai-setup.sh
@@ -100,10 +106,10 @@ case "$choice" in
     echo -n "Продолжить? [y/N] "
     read -r confirm
     [ "$confirm" = "y" ] || [ "$confirm" = "Y" ] || exit 0
-    sudo bash scripts/ks-off.sh
+    sudo USER_HOME="$HOME" bash scripts/ks-off.sh
     ;;
   4)
-    sudo bash scripts/ks-on.sh
+    sudo USER_HOME="$HOME" bash scripts/ks-on.sh
     ;;
   5)
     echo -e "${BLD}=== Статус ===${CLR}"
@@ -171,6 +177,14 @@ case "$choice" in
         echo -e "  ${YEL}✗${CLR} $_name: недоступен"
       fi
     done
+
+    echo ""
+    echo -e "${BLD}Последние события:${CLR}"
+    if [ -f "$LOG" ]; then
+      tail -10 "$LOG" | sed 's/^/  /'
+    else
+      echo "  (лог пуст)"
+    fi
     ;;
   6)
     bash tests/test_network.sh