feat(simulations): useSimulation hook + TaskSelector + SimulationForm + SimulationPage + route (Sprint 3 étape 14)

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

src/features/simulations/hooks/useSimulation.ts

@@ -0,0 +1,74 @@
+/**
+ * Hook d'orchestration du flux simulation EE.
+ *
+ * Séquence : createSimulation (POST /simulations)
+ *         → correctEe (POST /corrections/ee, timeout 30 s)
+ *
+ * State machine :
+ *   'idle'          → sélection de tâche disponible
+ *   'task-selected' → formulaire de saisie visible
+ *   'correcting'    → correction en cours (30 s max)
+ *   'done'          → rapport disponible dans `report`
+ *
+ * Règle H : aucune logique métier ici — les gardes de quota et de plan
+ * sont dans TaskSelector (UX) et dans le backend (autorité).
+ */
+
+import { useState } from 'react'
+import { useMutation } from '@tanstack/react-query'
+import { createSimulation } from '@/entities/production/api'
+import { correctEe } from '@/entities/report/api'
+import type { CreateSimulationPayload, Production } from '@/entities/production/types'
+import type { Report } from '@/entities/report/types'
+import type { ApiError } from '@/shared/types/api'
+
+export type SimulationStep = 'idle' | 'task-selected' | 'correcting' | 'done'
+
+export function useSimulation() {
+  const [step, setStep] = useState<SimulationStep>('idle')
+  const [production, setProduction] = useState<Production | null>(null)
+
+  const createMutation = useMutation({
+    mutationFn: createSimulation,
+    onSuccess: (data) => {
+      setProduction(data)
+      setStep('task-selected')
+    },
+  })
+
+  const correctMutation = useMutation({
+    mutationFn: correctEe,
+    onMutate: () => setStep('correcting'),
+    onSuccess: () => setStep('done'),
+    onError: () => setStep('task-selected'),
+  })
+
+  function selectTask(payload: CreateSimulationPayload): void {
+    createMutation.mutate(payload)
+  }
+
+  function submitText(texte: string): void {
+    if (!production) return
+    correctMutation.mutate({ simulation_id: production.id, texte })
+  }
+
+  function reset(): void {
+    setStep('idle')
+    setProduction(null)
+    createMutation.reset()
+    correctMutation.reset()
+  }
+
+  return {
+    step,
+    production,
+    report: (correctMutation.data ?? null) as Report | null,
+    isCreating: createMutation.isPending,
+    isCorrecting: correctMutation.isPending,
+    createError: createMutation.error as ApiError | null,
+    correctError: correctMutation.error as ApiError | null,
+    selectTask,
+    submitText,
+    reset,
+  }
+}