conductor(checkpoint): Checkpoint end of Phase 2 — feature_bleed_cleanup_20260302
Phase 2: Menu Bar Consolidation - Deleted dead begin_main_menu_bar() block (24 lines, always-False in HelloImGui) - Added 'manual slop' > Quit menu to live _show_menus using runner_params.app_shall_exit - 32 tests passed, import clean - Quit menu verified by user
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