feat(dashboard): PaywallBanner + DashboardPage conditionnel (Sprint 1 étape 5)

src/app/router.tsx

@@ -4,22 +4,12 @@ import { Navigate, Routes, Route } from 'react-router-dom'
 import { LoginPage } from '@/features/auth/pages/LoginPage'
 import { RegisterPage } from '@/features/auth/pages/RegisterPage'
 import { ProtectedRoute } from '@/features/auth/components/ProtectedRoute'
+import { DashboardPage } from '@/features/dashboard/pages/DashboardPage'
 
 const DesignSystemPage = import.meta.env.DEV
   ? React.lazy(() => import('@/features/design-system/DesignSystemPage'))
   : () => null
 
-function DashboardStub() {
-  return (
-    <main className="min-h-screen bg-canvas p-6">
-      <h1 className="text-2xl font-semibold text-ink-1">Dashboard — stub</h1>
-      <p className="mt-2 text-sm text-ink-3">
-        Cette vue sera remplacée par DashboardPage au prochain lot du Sprint 1.
-      </p>
-    </main>
-  )
-}
-
 export function AppRouter() {
   return (
     <Routes>
@@ -30,7 +20,7 @@ export function AppRouter() {
         path="/dashboard"
         element={
           <ProtectedRoute>
-            <DashboardStub />
+            <DashboardPage />
           </ProtectedRoute>
         }
       />

src/features/dashboard/components/PaywallBanner.tsx

@@ -0,0 +1,25 @@
+/**
+ * Bannière inline affichée sur le dashboard pour les utilisateurs Free.
+ * Présente les features débloquées par Standard et oriente vers /pricing.
+ * Pas de modale — intégrée dans le flux de la page (cf. PARCOURS_UTILISATEURS §2).
+ */
+
+import { Link } from 'react-router-dom'
+import { Button } from '@/shared/components/ui/button'
+
+export function PaywallBanner() {
+  return (
+    <div className="rounded-lg border border-expria-100 bg-expria-50 p-4 dark:border-expria/20">
+      <p className="text-sm font-semibold text-ink-1">Passez à Standard pour débloquer :</p>
+      <ul className="mt-2 space-y-1 text-sm text-ink-3" role="list">
+        <li>Simulations illimitées</li>
+        <li>Rapport détaillé par critère</li>
+        <li>Historique de vos productions</li>
+        <li>Suivi de progression</li>
+      </ul>
+      <Button asChild size="sm" className="mt-4 w-full">
+        <Link to="/pricing">Passer à Standard</Link>
+      </Button>
+    </div>
+  )
+}

src/features/dashboard/pages/DashboardPage.tsx

@@ -0,0 +1,130 @@
+/**
+ * Page dashboard — affichage conditionnel selon le plan utilisateur.
+ *
+ * Toute logique de permission passe par hasAccess() et canSimulate()
+ * (Règles D et H — jamais de if plan === '...').
+ */
+
+import { useQueryClient } from '@tanstack/react-query'
+import { Logo } from '@/shared/components/Logo'
+import { ThemeToggle } from '@/shared/components/ThemeToggle'
+import { Button } from '@/shared/components/ui/button'
+import { Badge } from '@/shared/components/ui/badge'
+import { hasAccess, canSimulate } from '@/entities/user/lib'
+import type { Plan } from '@/entities/user/types'
+import { useAuth } from '@/features/auth/hooks/useAuth'
+import { usePlan } from '../hooks/usePlan'
+import { PaywallBanner } from '../components/PaywallBanner'
+import { PLAN_QUERY_KEY } from '../hooks/usePlan'
+
+const PLAN_LABELS: Record<Plan, string> = {
+  free: 'Plan Découverte',
+  standard: 'Plan Standard',
+  premium: 'Plan Premium',
+}
+
+function getDisplayName(user: { user_metadata?: { full_name?: string }; email?: string } | null): string {
+  const fullName = user?.user_metadata?.full_name
+  if (fullName) return fullName.split(' ')[0]
+  const email = user?.email
+  if (email) return email.split('@')[0]
+  return 'vous'
+}
+
+function DashboardSkeleton() {
+  return (
+    <div className="space-y-6" aria-busy="true" aria-label="Chargement du tableau de bord">
+      <div className="h-8 w-48 animate-pulse rounded-md bg-canvas-2" />
+      <div className="grid grid-cols-2 gap-4">
+        <div className="h-24 animate-pulse rounded-lg bg-canvas-2" />
+        <div className="h-24 animate-pulse rounded-lg bg-canvas-2" />
+      </div>
+      <div className="h-9 animate-pulse rounded-md bg-canvas-2" />
+      <div className="h-16 animate-pulse rounded-lg bg-canvas-2" />
+    </div>
+  )
+}
+
+export function DashboardPage() {
+  const { user } = useAuth()
+  const { data, isLoading, isError } = usePlan()
+  const queryClient = useQueryClient()
+
+  const displayName = getDisplayName(user)
+
+  return (
+    <div className="min-h-screen bg-canvas">
+      <header className="flex items-center justify-between border-b border-line bg-surface px-4 py-3">
+        <Logo size="sm" />
+        <ThemeToggle />
+      </header>
+
+      <main className="mx-auto max-w-2xl px-4 py-6">
+        {isLoading && <DashboardSkeleton />}
+
+        {isError && (
+          <div className="space-y-3 text-center">
+            <p className="text-sm text-danger">
+              Impossible de charger votre tableau de bord. Réessayez dans quelques instants.
+            </p>
+            <Button
+              variant="outline"
+              size="sm"
+              onClick={() => queryClient.refetchQueries({ queryKey: PLAN_QUERY_KEY })}
+            >
+              Réessayer
+            </Button>
+          </div>
+        )}
+
+        {data && (
+          <div className="space-y-6">
+            {/* Salutation */}
+            <section className="flex flex-wrap items-center gap-3">
+              <h1 className="text-2xl font-semibold text-ink-1">
+                Bonjour, {displayName}
+              </h1>
+              <Badge variant="secondary">{PLAN_LABELS[data.plan]}</Badge>
+            </section>
+
+            {/* Bannière upgrade — plan Free uniquement */}
+            {!hasAccess(data.plan, 'dashboard') && <PaywallBanner />}
+
+            {/* Métriques */}
+            <section
+              className="grid grid-cols-2 gap-4"
+              aria-label="Métriques de préparation"
+            >
+              <div className="rounded-lg border border-line bg-surface p-4">
+                <p className="text-xs text-ink-4">Simulations restantes</p>
+                <p className="mt-1 text-2xl font-semibold text-ink-1">
+                  {data.simulations_remaining === null
+                    ? 'Illimitées'
+                    : data.simulations_remaining}
+                </p>
+              </div>
+              <div className="rounded-lg border border-line bg-surface p-4">
+                <p className="text-xs text-ink-4">Niveau NCLC estimé</p>
+                <p className="mt-1 text-2xl font-semibold text-ink-1">—</p>
+              </div>
+            </section>
+
+            {/* CTA Nouvelle simulation */}
+            <Button
+              className="w-full"
+              disabled={!canSimulate(data.plan, data.simulations_used).allowed}
+            >
+              Nouvelle simulation
+            </Button>
+
+            {/* Dernières simulations */}
+            <section aria-label="Dernières simulations">
+              <h2 className="text-base font-semibold text-ink-1">Dernières simulations</h2>
+              <p className="mt-2 text-sm text-ink-4">Aucune simulation pour l'instant.</p>
+            </section>
+          </div>
+        )}
+      </main>
+    </div>
+  )
+}