d20aac4aeb
The live report: an SPI2 01 secured packet reported no PoR. For such a packet TS 31.115 4.2/4.4 (b6=0) has the Response Packet retrieved by the ME from the ENVELOPE exchange (SEND SHORT MESSAGE is the b6=1 case), but _send_envelope only asked for response bytes after a 61xx answer - the card signals them with 62xx/63xx instead (the "more data" quirk the remote-command SWs already acknowledge, _ram_remote_sw_ok), so the whole PoR stayed on the card and the late-PoR STATUS poll found nothing. _envelope_get_response (shared with _send_event_download, which had the same 61xx-only code): a 61xx names the GET RESPONSE length; a 62xx/63xx without data gets Le 256 (00c0000000 - a bare 61 no longer emits the odd-length '%02x' % 0x100 APDU). The result is adopted when bytes were delivered (or for a 61xx); otherwise the warning stays, so the v3.6.58 SEND-SM PoR path (the STATUS poll) keeps working. Tests: the 61xx length, the 63xx+PoR fetch (Le 256), the bare-61 encoding, the warning-kept path (the poll still runs) and the event-download sharing. 887 frontend + 880 Python; sw cache simple-v431.