feat(mqlaunch): add stack health sweep as agent menu item 18

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

Author: MCamner

terminal/menus/mq-agent-menu.sh

@@ -23,7 +23,7 @@ print_agent_menu() {
   surface_row "" "$width" "$panel_color"
   surface_row "SECOND BRAIN  (writes to mqobsidian)" "$width" "$panel_color"
   surface_split_row "15. Review repo → brain" "16. Promote learn pattern" "$width" "$panel_color"
-  surface_split_row "${C_WARN}17. Demo flow (full stack)${C_RESET}" "" "$width" "$panel_color"
+  surface_split_row "${C_WARN}17. Demo flow (full stack)${C_RESET}" "${C_WARN}18. Stack health sweep${C_RESET}" "$width" "$panel_color"
   surface_row "" "$width" "$panel_color"
   surface_row "MCP LOCAL TOOLS  (:8765)" "$width" "$panel_color"
   surface_split_row "11. MCP status" "12. MCP tools list" "$width" "$panel_color"
@@ -306,6 +306,7 @@ handle_agent_menu_choice() {
     15) _run_agent review repo . --brain; pause_enter ;;
     16) _brain_pick_and_promote ;;
     17) _run_demo_flow; pause_enter ;;
+    18) _run_agent stack sweep --brain; pause_enter ;;
     b|B|x|X|exit) return 1 ;;
     *) printf "%b Invalid selection:%b %s\n" "${C_ERR:-}" "${C_RESET:-}" "$choice"; pause_enter ;;
   esac