feat(decodes): NEW STATE — badge and filter

The WAS gap made visible: a worked-states set joins the cluster status cache
(distinct states over the three US entities), the status entries carry a
NewState flag wherever the state resolves (log county first, ULS licence
second), and the decode panel gains the badge in its status column plus the
filter chip alongside NEW/BAND/MODE/GRID. Colour from the shared marker
palette, so the cluster can adopt it later without a second hue.

frontend/src/lib/spotMarkers.ts

@@ -18,7 +18,7 @@
 //   grid    magenta — the last hue in the categorical set that is not already
 //                     spoken for here and does not read as a status; a grid is
 //                     never urgent the way a new entity is
-export type SpotMarkerKey = 'new_pota' | 'new_county' | 'new_pfx' | 'worked_call' | 'new_grid';
+export type SpotMarkerKey = 'new_pota' | 'new_county' | 'new_pfx' | 'worked_call' | 'new_grid' | 'new_state';
 
 export type SpotMarker = {
   key: SpotMarkerKey;
@@ -32,6 +32,7 @@ export const SPOT_MARKERS: SpotMarker[] = [
   { key: 'new_county', colour: 'var(--chart-5)', labelKey: 'clg2.newCounty' },
   { key: 'new_pfx', colour: 'var(--caution)', labelKey: 'clg2.newPfx' },
   { key: 'new_grid', colour: 'var(--chart-7)', labelKey: 'clg2.newGrid' },
+  { key: 'new_state', colour: 'var(--chart-3)', labelKey: 'clg2.newState' },
   { key: 'worked_call', colour: 'var(--info)', labelKey: 'clg2.wkdCall' },
 ];