827eb63bab
Backend: - migration 003: apply pixel→grid transform per-element (CASE WHEN > 50) instead of per-row, preventing double-conversion of mixed-scale rooms; skip empty arrays via json_array_length guard to avoid NULL assignment - attendance.rs: log layout JSON parse errors instead of silently swallowing them with .ok() - tutors.rs: check rows_affected() in set_tutor_active and return 404 for non-existent IDs; remap FK constraint errors on delete to 409 so concurrent inserts between conflict-check and DELETE don't surface as 500 Frontend: - live/[slotId]: expose polling failures to the tutor via error banner instead of only console.error - s/[code]: split checkin into two try/catch blocks so a successful POST followed by a failed reload doesn't report failure to the student; fix dead '409' string detection to match actual server error 'seat taken' - rooms/[roomId]: remove duplicate onMount fetch; add .catch() to $effect - tutors: expose loadTutors failures via error banner, not just console - rooms: fix bare catch in createRoom (captures error, shows message); add try/catch to onMount rooms load CI: - sync cargo audit --ignore RUSTSEC-2023-0071 with Makefile; the advisory is in rsa which sqlx-mysql retains in the lock file even when the mysql feature is disabled — aws_lc_rs correctly removes it from the active tree