feat(intrants): frontend API clients + Pinia stores

frontend/src/api/achats.ts

@@ -0,0 +1,28 @@
+// frontend/src/api/achats.ts
+import client from './client'
+
+export interface AchatIntrant {
+  id?: number
+  categorie: string        // terreau | engrais | traitement | autre
+  nom: string
+  marque?: string
+  boutique_nom?: string
+  boutique_url?: string
+  prix?: number
+  poids?: string
+  date_achat?: string
+  dluo?: string
+  notes?: string
+  jardin_id?: number
+  plantation_id?: number
+  tache_id?: number
+}
+
+export const achatsApi = {
+  list: (params?: { categorie?: string; jardin_id?: number }) =>
+    client.get<AchatIntrant[]>('/api/achats', { params }).then(r => r.data),
+  get: (id: number) => client.get<AchatIntrant>(`/api/achats/${id}`).then(r => r.data),
+  create: (a: Partial<AchatIntrant>) => client.post<AchatIntrant>('/api/achats', a).then(r => r.data),
+  update: (id: number, a: Partial<AchatIntrant>) => client.put<AchatIntrant>(`/api/achats/${id}`, a).then(r => r.data),
+  delete: (id: number) => client.delete(`/api/achats/${id}`),
+}