Mask-weighted net Swift-BAT light curves for the 24 GRBs in our ME+EE sample. Red and blue dashed vertical lines mark the boundaries of the ME (G₁) and EE (G₂) episode time windows, respectively. The green horizontal dashed line marks zero count rate. The light curves are plotted directly from the FITS RATE column, in units of counts s⁻¹ det⁻¹. Negative bins are expected for background-subtracted mask-weighted light curves and are retained in all time-integrated measurements.