feat(intrants): add /intrants route + sidebar nav

frontend/src/App.vue

@@ -192,6 +192,7 @@ const links = [
   { to: '/plantes', label: 'Plantes', icon: '🌱' },
   { to: '/bibliotheque', label: 'Bibliothèque', icon: '📷' },
   { to: '/outils', label: 'Outils', icon: '🔧' },
+  { to: '/intrants', label: 'Intrants', icon: '🧪' },
   { to: '/plantations', label: 'Plantations', icon: '🥕' },
   { to: '/taches', label: 'Tâches', icon: '✅' },
   { to: '/planning', label: 'Planning', icon: '📆' },

frontend/src/components/AppDrawer.vue

@@ -24,6 +24,7 @@ const links = [
   { to: '/plantes', label: 'Plantes' },
   { to: '/bibliotheque', label: '📷 Bibliothèque' },
   { to: '/outils', label: 'Outils' },
+  { to: '/intrants', label: '🧪 Intrants' },
   { to: '/plantations', label: 'Plantations' },
   { to: '/taches', label: 'Tâches' },
   { to: '/planning', label: 'Planning' },

frontend/src/router/index.ts

@@ -9,6 +9,7 @@ export default createRouter({
     { path: '/plantes',     component: () => import('@/views/PlantesView.vue') },
     { path: '/bibliotheque', component: () => import('@/views/BibliothequeView.vue') },
     { path: '/outils',      component: () => import('@/views/OutilsView.vue') },
+    { path: '/intrants', component: () => import('@/views/IntratsView.vue') },
     { path: '/plantations', component: () => import('@/views/PlantationsView.vue') },
     { path: '/planning',    component: () => import('@/views/PlanningView.vue') },
     { path: '/taches',      component: () => import('@/views/TachesView.vue') },