sensors.yaml formatted the raw BME280 reading directly with no unit
conversion, inconsistent with the dial setpoints and weather widget, which
are already Fahrenheit. Converts at the only point this sensor's value
reaches the UI (shared by every display variant); climate.yaml's internal
Celsius values are untouched since ESPHome's climate component always
operates in Celsius regardless of display unit.
The dual-arc setpoint dial uses a Fahrenheit-range scale (60-90) to
match the Lennox reference UI, but climate.control expects Celsius
throughout this codebase. Dragging the dial was sending raw
Fahrenheit values straight into target_temperature_low/high, which
would have commanded wildly wrong setpoints on live hardware.
Also fixes a stale comment pointing at the wrong file after the
panel.yaml extraction.
