v2.6.4

Fixed

• Prevent QR account mode from publishing unresolved infrared remotes as a nonfunctional HomeKit thermostat showing 0 °C.
• Show stored QR authorization alongside an active Developer Cloud configuration without implying that IR users should switch modes.

Changed

• Warn and require confirmation before switching a stored account to QR mode because Tuya's QR API does not expose IR metadata or command endpoints.
• Document that IR hubs, AC thermostats, and remotes require Tuya Developer Cloud mode.

Verification

• 82 automated tests pass.
• Lint and TypeScript build pass.