feat: simulation portfolio surveillance + patterns grid/filter UI

Portfolio Monitor (v4.4):
- New portfolio_risk.py service: concentration by asset_class, directional
  conflict detection (same underlying, opposite directions), overweight alerts
- AI agent (Step 7b) runs GPT-4o-mini after each cycle log: assessment +
  prioritized actions + rebalance suggestion, persisted in system_logs
- GET /api/journal/portfolio-risk — full risk breakdown + latest AI monitor reco
- POST /api/journal/trade-check — pre-entry conflict & concentration check
- asset_class column added to trade_entry_prices (auto-migration + populated at INSERT)
- Journal: new "Risque Sim." tab with concentration bars, conflict alerts,
  AI recommendations; red badge on tab when danger alerts exist

PatternEditor:
- Grid view default (2-3 cols responsive), list toggle
- Asset class filter chips (energy/metals/agri/equities/indices/forex/rates)
- Sort: Date (default) / Score IA / Prob.
- Period filter: Tout / 7j / 30j
- Result count badge when filters active

Doc: v4.3 → v4.4, updated Journal/PatternEditor/cycle steps/schema/glossary

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/hooks/useApi.ts

@@ -341,6 +341,7 @@ export const CYCLE_REFRESH_KEYS = [
   ['journal-macro'],
   ['geo-risk-score'],
   ['pattern-matches'],
+  ['journal-portfolio-risk'],
 ]
 
 export const useTriggerCycle = () => {
@@ -458,6 +459,19 @@ export const useSaveExitDefaults = () => {
   })
 }
 
+export const useSimPortfolioRisk = () =>
+  useQuery({
+    queryKey: ['journal-portfolio-risk'],
+    queryFn: () => api.get('/journal/portfolio-risk').then(r => r.data),
+    staleTime: 30_000,
+  })
+
+export const useTradeCheck = () =>
+  useMutation({
+    mutationFn: (body: { underlying: string; strategy: string; asset_class: string }) =>
+      api.post('/journal/trade-check', body).then(r => r.data),
+  })
+
 // ── Risk Profiles ─────────────────────────────────────────────────────────────
 
 export const useRiskProfiles = () =>