feat(shopping): refonte UX + CRUD catalogue/boutiques + champs enrichis

- UX : vue par défaut = liste en cours, landing si pas de liste (+ vert +
  baguette magique), suppression des vues "listes" et "mode magasin" séparés
- Articles cochés barrés et déplacés en bas, tri alphabétique par section
- Nom de liste auto avec numéro de semaine ISO (S21 2026)
- Wake lock activé dès qu'une liste est ouverte
- CRUD boutiques : POST/PATCH/DELETE /stores + modal Boutiques
- CRUD articles : POST/PATCH/DELETE /products + modal Catalogue
- Champs enrichis produits : description, prix, quantité/unité, boutique défaut
- Champs enrichis boutiques : url, store_type (alimentaire, bricolage…)
- Migration 003 : nouveaux champs en base

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

frontend/src/api/shopping.ts

@@ -4,6 +4,22 @@ export interface Store {
   id: string
   name: string
   location: string | null
+  url: string | null
+  store_type: string | null
+}
+
+export interface StoreCreate {
+  name: string
+  location?: string
+  url?: string
+  store_type?: string
+}
+
+export interface StoreUpdate {
+  name?: string
+  location?: string
+  url?: string
+  store_type?: string
 }
 
 export interface Product {
@@ -11,10 +27,39 @@ export interface Product {
   name: string
   brand: string | null
   category: string | null
+  description: string | null
   default_unit: string | null
+  barcode: string | null
+  price: string | null
+  quantity_per_unit: string | null
+  default_store_id: string | null
   frequency_score: number
 }
 
+export interface ProductCreate {
+  name: string
+  brand?: string
+  category?: string
+  description?: string
+  default_unit?: string
+  barcode?: string
+  price?: string
+  quantity_per_unit?: string
+  default_store_id?: string
+}
+
+export interface ProductUpdate {
+  name?: string
+  brand?: string
+  category?: string
+  description?: string
+  default_unit?: string
+  barcode?: string
+  price?: string
+  quantity_per_unit?: string
+  default_store_id?: string
+}
+
 export interface ShoppingItem {
   id: string
   product_id: string | null
@@ -77,15 +122,62 @@ async function handleResponse<T>(res: Response): Promise<T> {
   return res.json() as Promise<T>
 }
 
+// ── Stores ───────────────────────────────────────────────────────────────────
+
 export async function fetchStores(): Promise<Store[]> {
   return handleResponse(await fetch(`${BASE}/stores`))
 }
 
-export async function searchProducts(q?: string): Promise<Product[]> {
-  const qs = q ? `?q=${encodeURIComponent(q)}&limit=30` : '?limit=30'
-  return handleResponse(await fetch(`${BASE}/products${qs}`))
+export async function createStore(data: StoreCreate): Promise<Store> {
+  return handleResponse(await fetch(`${BASE}/stores`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(data),
+  }))
 }
 
+export async function updateStore(id: string, data: StoreUpdate): Promise<Store> {
+  return handleResponse(await fetch(`${BASE}/stores/${id}`, {
+    method: 'PATCH',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(data),
+  }))
+}
+
+export async function deleteStore(id: string): Promise<void> {
+  return handleResponse(await fetch(`${BASE}/stores/${id}`, { method: 'DELETE' }))
+}
+
+// ── Products ─────────────────────────────────────────────────────────────────
+
+export async function searchProducts(q?: string, limit = 50): Promise<Product[]> {
+  const qs = new URLSearchParams({ limit: String(limit) })
+  if (q) qs.set('q', q)
+  return handleResponse(await fetch(`${BASE}/products?${qs}`))
+}
+
+export async function createProduct(data: ProductCreate): Promise<Product> {
+  return handleResponse(await fetch(`${BASE}/products`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(data),
+  }))
+}
+
+export async function updateProduct(id: string, data: ProductUpdate): Promise<Product> {
+  return handleResponse(await fetch(`${BASE}/products/${id}`, {
+    method: 'PATCH',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(data),
+  }))
+}
+
+export async function deleteProduct(id: string): Promise<void> {
+  return handleResponse(await fetch(`${BASE}/products/${id}`, { method: 'DELETE' }))
+}
+
+// ── Lists ─────────────────────────────────────────────────────────────────────
+
 export async function fetchLists(): Promise<ShoppingList[]> {
   return handleResponse(await fetch(`${BASE}/lists`))
 }
@@ -114,6 +206,8 @@ export async function deleteList(id: string): Promise<void> {
   return handleResponse(await fetch(`${BASE}/lists/${id}`, { method: 'DELETE' }))
 }
 
+// ── Items ─────────────────────────────────────────────────────────────────────
+
 export async function addItem(listId: string, data: ShoppingItemCreate): Promise<ShoppingItem> {
   return handleResponse(await fetch(`${BASE}/lists/${listId}/items`, {
     method: 'POST',