feat: instrument model

frontend/src/App.tsx

@@ -35,6 +35,7 @@ import AIDesks from './pages/AIDesks'
 import MacroSeriesPage from './pages/MacroSeriesPage'
 import EuroSimulator from './pages/EuroSimulator'
 import CausalLab from './pages/CausalLab'
+import InstrumentModels from './pages/InstrumentModels'
 import { useCycleWatcher } from './hooks/useApi'
 
 // ── Keep-alive pages ──────────────────────────────────────────────────────────
@@ -62,6 +63,7 @@ const KEEP_ALIVE_DEFS: { path: string; component: ComponentType }[] = [
   { path: '/calendar',           component: CalendarPage       },
   { path: '/simulator',          component: EuroSimulator      },
   { path: '/causal-lab',         component: CausalLab          },
+  { path: '/instrument-models',  component: InstrumentModels   },
   { path: '/macro-series',       component: MacroSeriesPage    },
   { path: '/institutional',      component: InstitutionalReports },
   { path: '/specialist-desks',   component: SpecialistDesks    },