Add trap overlays with session state, material legend editor/panel, and a dedicated scene editor window wired through IPC and project persistence.
Co-authored-by: Cursor <cursoragent@cursor.com>
Add darkenScene with Opening brush in presentation, persist reveal strokes per scene during a session, and close projects properly on return to home. Harden dnd asset streaming to avoid Windows main-process crashes when reopening projects.
Co-authored-by: Cursor <cursoragent@cursor.com>