fix(v2): radar data flow + inventory icons

Radar:
- nearby_objects WebSocket messages now tracked in useLiveData state
- Passed through MapLayout → WindowRenderer → RadarWindow
- Objects list updates live as radar data streams in

Inventory:
- Items now render actual game icons via /icons/{hexId}.png
  using the portal.dat offset formula (iconRaw + 0x06000000)
- Hover tooltip shows: name, material, AL, damage, workmanship,
  tinks, set, imbue (multi-line)
- Equipment grid slots show item icons instead of text names
- Pack item grid shows item icons with proper tooltips
- Fallback icon (06000133.png) on load error

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/hooks/useLiveData.ts

@@ -13,6 +13,7 @@ export interface DashboardState {
   totalKills: number;
   recentRares: RareMessage[];
   chatMessages: Map<string, Array<{ text: string; color?: number; timestamp: string }>>;
+  nearbyObjects: Map<string, any>;
   socketRef: React.RefObject<WebSocket | null>;
 }
 
@@ -23,6 +24,7 @@ export function useLiveData(): DashboardState {
   const [totalKills, setTotalKills] = useState(0);
   const [recentRares, setRecentRares] = useState<RareMessage[]>([]);
   const [chatMessages, setChatMessages] = useState<Map<string, Array<{ text: string; color?: number; timestamp: string }>>>(new Map());
+  const [nearbyObjects, setNearbyObjects] = useState<Map<string, any>>(new Map());
   const charsRef = useRef(characters);
   charsRef.current = characters;
 
@@ -52,6 +54,13 @@ export function useLiveData(): DashboardState {
     } else if (msg.type === 'rare') {
       const r = msg as RareMessage;
       setRecentRares(prev => [r, ...prev].slice(0, 50));
+    } else if (msg.type === 'nearby_objects') {
+      const no = msg as unknown as { character_name: string; objects: any[] };
+      setNearbyObjects(prev => {
+        const next = new Map(prev);
+        next.set(no.character_name, no);
+        return next;
+      });
     } else if (msg.type === 'chat') {
       const m = msg as unknown as { character_name: string; text: string; color?: number; timestamp: string };
       setChatMessages(prev => {
@@ -141,5 +150,5 @@ export function useLiveData(): DashboardState {
     return () => clearInterval(id);
   }, []);
 
-  return { characters, serverHealth, totalRares, totalKills, recentRares, chatMessages, socketRef };
+  return { characters, serverHealth, totalRares, totalKills, recentRares, chatMessages, nearbyObjects, socketRef };
 }