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/App.tsx

@@ -2088,7 +2088,7 @@ export default function App() {
   // worked_slot must be carried explicitly like every other field: this map is
   // assembled field by field, so a backend flag that nobody copies here simply
   // never reaches the panels — silently, since the extra key is just dropped.
-  const [spotStatus, setSpotStatus] = useState<Record<string, { status: string; country?: string; continent?: string; worked_call?: boolean; worked_slot?: boolean; new_county?: boolean; county?: string; state?: string; lotw?: boolean; spotter_continent?: string; grid?: string; new_grid?: boolean; new_pota?: boolean; new_pfx?: boolean; pfx?: string }>>({});
+  const [spotStatus, setSpotStatus] = useState<Record<string, { status: string; country?: string; continent?: string; worked_call?: boolean; worked_slot?: boolean; new_county?: boolean; county?: string; state?: string; lotw?: boolean; spotter_continent?: string; grid?: string; new_grid?: boolean; new_state?: boolean; new_pota?: boolean; new_pfx?: boolean; pfx?: string }>>({});
   // Live mirror of spotStatus so the incoming-spot buffer can tell which slots
   // still need resolving without re-subscribing the cluster:spot listener.
   const spotStatusRef = useRef(spotStatus);
@@ -3639,6 +3639,7 @@ export default function App() {
                 worked_call: !!(r as any).worked_call,
                 worked_slot: !!(r as any).worked_slot,
                 new_county: !!(r as any).new_county, lotw: !!(r as any).lotw, spotter_continent: (r as any).spotter_continent, grid: (r as any).grid, new_grid: !!(r as any).new_grid, county: (r as any).county, state: (r as any).state,
+                new_state: !!(r as any).new_state,
                 new_pota: !!(r as any).new_pota,
                 new_pfx: !!(r as any).new_pfx,
                 pfx: (r as any).pfx,
@@ -3745,6 +3746,7 @@ export default function App() {
                 new_county: !!(r as any).new_county, lotw: !!(r as any).lotw,
                 grid: (r as any).grid, new_grid: !!(r as any).new_grid,
                 county: (r as any).county, state: (r as any).state,
+                new_state: !!(r as any).new_state,
                 new_pota: !!(r as any).new_pota,
                 new_pfx: !!(r as any).new_pfx, pfx: (r as any).pfx,
               };