fix(v2): character window now updates live from WebSocket

The CharacterWindow only fetched once from API on mount and never
updated. Now:
- character_stats WS messages are tracked in useLiveData via ref
- Passed through WindowRenderer to CharacterWindow as liveStats prop
- Window uses live WS data when available, falls back to API fetch
- Attributes, skills, vitals base values, properties (augmentations,
  ratings, etc.), allegiance all update in real-time

Also: vitals bars in the character window use live WS vitals data
(health_percentage etc.) for real-time HP/Stamina/Mana display.

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

frontend/src/hooks/useLiveData.ts

@@ -16,6 +16,7 @@ export interface DashboardState {
   nearbyObjects: Map<string, any>;
   inventoryVersion: number;
   equipmentCantrips: Map<string, any>;
+  characterStats: Map<string, any>;
   socketRef: React.RefObject<WebSocket | null>;
 }
 
@@ -30,6 +31,8 @@ export function useLiveData(): DashboardState {
   const [inventoryVersion, setInventoryVersion] = useState(0);
   const equipmentCantripRef = useRef(new Map<string, any>());
   const [equipCantripVersion, setEquipCantripVersion] = useState(0);
+  const characterStatsRef = useRef(new Map<string, any>());
+  const [charStatsVersion, setCharStatsVersion] = useState(0);
   const [nearbyObjects, setNearbyObjects] = useState<Map<string, any>>(new Map());
   const charsRef = useRef(characters);
   charsRef.current = characters;
@@ -64,6 +67,11 @@ export function useLiveData(): DashboardState {
       const d = msg as unknown as { character_name: string };
       // Bump inventory version so open inventory windows can re-fetch
       setInventoryVersion(v => v + 1);
+    } else if (msg.type === 'character_stats') {
+      // Store full character stats for CharacterWindow live updates
+      const cs = msg as unknown as { character_name: string };
+      characterStatsRef.current.set(cs.character_name, msg);
+      setCharStatsVersion(v => v + 1);
     } else if (msg.type === 'equipment_cantrip_state') {
       const ecs = msg as unknown as { character_name: string; items: any[]; timestamp: string };
       equipmentCantripRef.current.set(ecs.character_name, ecs);
@@ -182,6 +190,8 @@ export function useLiveData(): DashboardState {
 
   // eslint-disable-next-line react-hooks/exhaustive-deps
   const equipmentCantrips = useMemo(() => equipmentCantripRef.current, [equipCantripVersion]);
+  // eslint-disable-next-line react-hooks/exhaustive-deps
+  const characterStats = useMemo(() => characterStatsRef.current, [charStatsVersion]);
 
-  return { characters, serverHealth, totalRares, totalKills, recentRares, chatMessages, nearbyObjects, inventoryVersion, equipmentCantrips, socketRef };
+  return { characters, serverHealth, totalRares, totalKills, recentRares, chatMessages, nearbyObjects, inventoryVersion, equipmentCantrips, characterStats, socketRef };
 }