Add managed Lab 3 browser terminal deployment

scripts/service_manager.sh

@@ -28,6 +28,44 @@ ensure_transformerlab_default_user() {
     --last-name "${TRANSFORMERLAB_DEFAULT_USER_LAST_NAME:-}" >>"$STATE_DIR/logs/transformerlab_default_user.log" 2>&1 || true
 }
 
+check_wetty_prereqs() {
+  if ! id "$COURSEWARE_STUDENT_USERNAME" >/dev/null 2>&1; then
+    echo "Missing terminal user '$COURSEWARE_STUDENT_USERNAME'. Re-run ./labctl up after setting COURSEWARE_STUDENT_PASSWORD_HASH." >&2
+    exit 1
+  fi
+
+  if [ ! -x "$WETTY_BIN" ]; then
+    echo "Missing WeTTY binary at $WETTY_BIN. Re-run ./labctl up." >&2
+    exit 1
+  fi
+
+  if [ ! -f "$WIKI_RUNTIME_CONFIG_PATH" ]; then
+    echo "Missing wiki runtime config at $WIKI_RUNTIME_CONFIG_PATH. Re-run ./labctl up." >&2
+    exit 1
+  fi
+
+  if [ ! -d "$COURSEWARE_LAB3_DIR" ]; then
+    echo "Missing lab workspace at $COURSEWARE_LAB3_DIR. Re-run ./labctl up." >&2
+    exit 1
+  fi
+
+  if ! python3 - <<'PY'
+import socket, sys
+sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+sock.settimeout(1)
+try:
+    sock.connect(("127.0.0.1", 22))
+except OSError:
+    sys.exit(1)
+finally:
+    sock.close()
+PY
+  then
+    echo "Loopback sshd is not reachable on 127.0.0.1:22." >&2
+    exit 1
+  fi
+}
+
 resolve_targets() {
   if [ $# -eq 0 ]; then
     echo "No target specified." >&2
@@ -82,7 +120,7 @@ service_ready() {
     promptfoo)
       curl -fsS "$(service_url "$service")/health" >/dev/null 2>&1
       ;;
-    open-webui|chunkviz|embedding-atlas|unsloth|wiki)
+    open-webui|chunkviz|embedding-atlas|unsloth|wiki|wetty)
       curl -fsS "$(service_url "$service")" >/dev/null 2>&1
       ;;
     *)
@@ -176,6 +214,9 @@ start_one() {
           --required-support "batched" >>"$STATE_DIR/logs/transformerlab_plugin_supports.log" 2>&1 || true
       fi
       ;;
+    wetty)
+      check_wetty_prereqs
+      ;;
     *)
       ;;
   esac
@@ -289,6 +330,7 @@ Unsloth Studio:  $(service_url unsloth)
 Promptfoo CLI:   $PROMPTFOO_BIN
 Promptfoo UI:    $(service_url promptfoo)
 Wiki:            $(service_url wiki)
+Lab 3 Terminal:  $(service_url wetty)
 Kiln app:        ${KILN_LAUNCH_PATH:-not installed}
 EOF
 }