The bind + confirm two-step flow has timezone issues between Node.js
(UTC on SCF) and MySQL (timezone +08:00) that cause bind_token to
fail validation. Add POST /api/v1/device/mock-bind that does bind +
confirm in one atomic step, skipping the token entirely. Only
available when NODE_ENV != production.
Update ble-connect and index page mock buttons to use mock-bind.
Guoguo
775112130d