v0.37.0

Added

• design.palette manifest opt-in for widgets that want to use arbitrary CSS colours (gradients, layered shapes, soft shadows) rather than the strict Spectra colour tokens. Default stays strict; widgets declare "design": {"palette": "extended"} to opt in. Renderer behaviour is unchanged: extended widgets rely on the existing Floyd-Steinberg dither pass to approximate their CSS colours on the panel palette. Typography + spacing tokens remain mandatory regardless of the palette flag so multi-widget dashboards stay visually coherent.

• weather_now_scenic widget, the reference implementation of the extended palette opt-in. Pill-shaped card with weather + time-of-day theming across nine presets (sunny day, clear night, partly day/night, cloudy day/night, rain, snow, storm). Same Open-Meteo data path as weather_now (shares the WMO mapping) but a slimmer payload tailored to the scenic layout. Ships as a separate widget rather than a style switch on weather_now so the two can coexist on a dashboard and the bundled widget keeps its strict-palette guarantees for BW panels.