Update NEWS with transition overlay support

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: NewGraphEnvironment

NEWS.md

@@ -1,8 +1,8 @@
 # drift (development)
 
 - `dft_rast_transition()` — cell-by-cell land cover transition detection with from/to class filters
-- `dft_map_interactive()` — add Google Satellite and Esri Satellite basemaps; support custom tile URLs
-- Vignette: transition detection, tree loss filtering, and multi-layer transition map
+- `dft_map_interactive()` — new `transition` parameter overlays transition layers as checkboxes; add Google Satellite and Esri Satellite basemaps; support custom tile URLs
+- Vignette: transition detection, tree loss filtering, single combined interactive map
 
 # drift 0.1.0