datetime.fromtimestamp(ts) and datetime.now() return naive local
datetimes; .isoformat() then emits no tz marker. The frontend's
parseUTCDate helper appends 'Z' to bare strings, treats the value
as UTC, then converts to local for display — applying the local
offset twice. Reporter on UTC+3 saw boot_time +3h ahead while
uptime was correct (uptime is a backend-side delta of two
naive-local values, so the missing tz info cancels out).
Fix: pass tz=timezone.utc to datetime.fromtimestamp and
datetime.now in system.py's boot_time / uptime path, plus the two
adjacent generated_at sites in system.py and support.py.
maziggy
8c326256db