Sub-ticket of MARS-94 SOP-13: práctica /nueva RX upload — iPhone HEIC 'Pre' RX silently dropped at add-time (accept=image/jpeg + silent non-JPEG continue); student submits incomplete 3-RX sets. Fix shipped v2.15.17 (f43733d): widen accept jpeg/png/heic/heif, de-silence w/ named toast, native HEIC->JPEG convert via createImageBitmap, + adaptive recompress for secondary aggregate-cap mode. Client-only. · mars