GeoSankey: persist fullscreen in fs URL param for iframe embeds

Author: ryan-williams

www/src/components/GeoSankey.tsx

@@ -755,7 +755,10 @@ function GeoSankeyInner({ data }: Props) {
     '24hr': '24hr',
   }
 
-  const [fullscreen, setFullscreen] = useState(false)
+  const [fullscreen, setFullscreen] = useUrlState('fs', {
+    encode: (v: boolean) => v ? '1' : undefined,
+    decode: (s: string | undefined) => s === '1',
+  })
   const mapFocusedRef = useRef(false)
   const [mapFocused, setMapFocused] = useState(false)
   const mapContainerRef = useRef<HTMLDivElement>(null)