Render an animated clct_animation.gif alongside the per-step PNGs.
Frames are loaded and colour-quantized in parallel via rayon, then
written sequentially with the gif crate. Also converts timestamps
to CET/CEST using chrono-tz.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Replace nearest-neighbour BFS flood fill with Delaunay triangulation
(spade) + barycentric interpolation for smooth cloud boundaries.
Add NaN-aware separable Gaussian blur (σ=8 px, rayon-parallelised) to
remove triangulation facets. Switch colour scheme from blue bands to a
continuous green-to-white opacity blend matching the DWD app style.
Pixel interpolation loop is also parallelised with rayon.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
