Add single-select target menu (arrow-key)

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

cleanup-server

@@ -51,6 +51,53 @@ print_banner() {
     echo ""
 }
 
+# -----------------------------
+# Danh sách target fix cứng (alias từ ~/.ssh/config)
+# -----------------------------
+TARGETS=("local" "ta" "toc" "oc" "cse" "vrc" "aws" "tk" "od")
+TARGET_CURSOR=0
+TARGET=""
+
+# Vẽ menu single-select
+draw_target_menu() {
+    if [ "$1" = "redraw" ]; then
+        printf '\033[%dA' "$(( ${#TARGETS[@]} + 2 ))"
+    fi
+    echo "  Chọn target (↑↓: di chuyển | Enter: chọn):"
+    echo ""
+    local i
+    for ((i = 0; i < ${#TARGETS[@]}; i++)); do
+        local prefix="  "
+        if [ "$i" -eq "$TARGET_CURSOR" ]; then
+            prefix="${C_TITLE}▸ ${C_RESET}"
+        fi
+        printf '\r\033[K%s%s\n' "$prefix" "${TARGETS[$i]}"
+    done
+}
+
+# Chạy menu, đặt biến toàn cục TARGET
+select_target() {
+    draw_target_menu
+    while true; do
+        IFS= read -rsn1 key
+        case "$key" in
+            $'\x1b')
+                read -rsn2 seq
+                case "$seq" in
+                    '[A') TARGET_CURSOR=$(( (TARGET_CURSOR - 1 + ${#TARGETS[@]}) % ${#TARGETS[@]} ));;
+                    '[B') TARGET_CURSOR=$(( (TARGET_CURSOR + 1) % ${#TARGETS[@]} ));;
+                esac
+                ;;
+            '')   # Enter
+                echo ""
+                TARGET="${TARGETS[$TARGET_CURSOR]}"
+                return
+                ;;
+        esac
+        draw_target_menu "redraw"
+    done
+}
+
 # -----------------------------
 # Main (phân nhánh theo argv)
 # -----------------------------
@@ -62,7 +109,9 @@ main() {
     fi
     print_banner
     echo "${C_TITLE}===== 🧹 Cleanup-server =====${C_RESET}"
-    echo "    (menu chọn target sẽ thêm ở Task 2)"
+    echo ""
+    select_target
+    echo "    Đã chọn target: ${C_TITLE}${TARGET}${C_RESET}  (chạy sẽ thêm ở Task 3)"
 }
 
 main "$@"