feat: risk

frontend/src/hooks/useApi.ts

@@ -317,6 +317,25 @@ export const usePnlHistory = () =>
     queryFn: () => api.get('/portfolio/pnl-history').then(r => r.data),
   })
 
+// P&L-vs-underlying-price payoff diagram for one position (services.portfolio_pricing.
+// compute_payoff) — at-expiry (pure intrinsic) + today (current vol held fixed) curves.
+export const usePositionPayoff = (posId: string, enabled: boolean) =>
+  useQuery({
+    queryKey: ['portfolio-payoff', posId],
+    queryFn: () => api.get(`/portfolio/positions/${posId}/payoff`).then(r => r.data),
+    enabled,
+  })
+
+// Reprices every open position under a handful of named macro scenarios (Risk-Off,
+// Risk-On, inflation persistante, dollar fort, baisse des matières premières) to surface
+// when several differently-named positions are really the same underlying bet.
+export const usePortfolioScenarioExposure = () =>
+  useQuery({
+    queryKey: ['portfolio-scenario-exposure'],
+    queryFn: () => api.get('/portfolio/scenario-exposure').then(r => r.data),
+    staleTime: 5 * 60_000,
+  })
+
 export const useAddPosition = () => {
   const qc = useQueryClient()
   return useMutation({