Identification of the [O III] emitting features. The solid yellow boxes highlight the regions of the extended [O III] emission discussed in the work with labels. As a visual aid for identifying diffuse emission, we plot the solid green contours corresponding to the 3-σ level (1.8 × 10⁻¹⁷ erg s⁻¹ cm⁻² arcsec⁻²) of the [O III] line map when smoothed to a resolution of 0.3”, enclosing most of the reliable features of extended emission features. The solid white contours correspond to the stellar continuum in Fig. 1 starting at 10-σ flux density level 4.2 × 10⁻² MJy sr⁻¹. The dashed cyan boxes mark the same continuum sources as in Fig. 1. The grey arrow and scale bars are copied from Fig. 1.