diff --git a/frontend/package.json b/frontend/package.json
index c857f8d..6649520 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -1,7 +1,7 @@
 {
   "name": "homehub-frontend",
   "private": true,
-  "version": "0.4.3",
+  "version": "0.4.4",
   "type": "module",
   "scripts": {
     "dev": "vite",
diff --git a/frontend/src/pages/ShoppingPage.tsx b/frontend/src/pages/ShoppingPage.tsx
index 5c9c63d..2c30b01 100644
--- a/frontend/src/pages/ShoppingPage.tsx
+++ b/frontend/src/pages/ShoppingPage.tsx
@@ -5,7 +5,7 @@ import type { ShoppingListDetail, ShoppingList, Store, Product, ShoppingItem } f
 import {
   fetchLists, createList, fetchListDetail, deleteList,
   addItem, updateItem, deleteItem, finishShopping, fetchStores, generateMagicList,
-  searchProducts,
+  searchProducts, createProduct,
 } from '../api/shopping'
 import Modal from '../components/Modal'
 import BottomSheet from '../components/BottomSheet'
@@ -67,7 +67,9 @@ export default function ShoppingPage() {
   const [editQty, setEditQty] = useState('')
   const [editUnit, setEditUnit] = useState('')
 
-  type Selection = { type: 'product'; product: Product; qty: number } | { type: 'custom'; name: string; qty: number }
+  type Selection =
+    | { type: 'product'; product: Product; qty: number; existingItemId?: string; originalQty?: number }
+    | { type: 'custom'; name: string; qty: number; addToCatalogue: boolean; existingItemId?: string; originalQty?: number }
   const [itemSearch, setItemSearch] = useState('')
   const [selections, setSelections] = useState<Selection[]>([])
   const [addSaving, setAddSaving] = useState(false)
@@ -137,6 +139,24 @@ export default function ShoppingPage() {
     setShowAddSheet(false)
   }
 
+  function openAddSheet() {
+    setItemSearch('')
+    const initial: Selection[] = []
+    if (currentList) {
+      for (const item of currentList.items.filter(i => !i.is_checked)) {
+        const qty = Math.max(1, Math.round(parseFloat(item.quantity ?? '1') || 1))
+        if (item.product_id) {
+          const product = products.find(p => p.id === item.product_id)
+          if (product) initial.push({ type: 'product', product, qty, existingItemId: item.id, originalQty: qty })
+        } else if (item.custom_name) {
+          initial.push({ type: 'custom', name: item.custom_name, qty, addToCatalogue: false, existingItemId: item.id, originalQty: qty })
+        }
+      }
+    }
+    setSelections(initial)
+    setShowAddSheet(true)
+  }
+
   function getProductQty(id: string): number {
     return (selections.find(s => s.type === 'product' && s.product.id === id) as Extract<Selection, { type: 'product' }> | undefined)?.qty ?? 0
   }
@@ -164,11 +184,17 @@ export default function ShoppingPage() {
     setSelections(prev => {
       const exists = prev.some(s => s.type === 'custom' && s.name === name)
       if (exists) return prev
-      return [...prev, { type: 'custom' as const, name, qty: 1 }]
+      return [...prev, { type: 'custom' as const, name, qty: 1, addToCatalogue: true }]
     })
     setItemSearch('')
   }
 
+  function toggleCatalogue(name: string) {
+    setSelections(prev => prev.map(s =>
+      s.type === 'custom' && s.name === name ? { ...s, addToCatalogue: !s.addToCatalogue } : s
+    ))
+  }
+
   function incrementCustom(name: string) {
     setSelections(prev => prev.map(s => s.type === 'custom' && s.name === name ? { ...s, qty: s.qty + 1 } : s))
   }
@@ -183,21 +209,31 @@ export default function ShoppingPage() {
   }
 
   async function handleConfirmAdd() {
-    if (!currentList || selections.length === 0) return
+    if (!currentList) return
+    const toProcess = selections.filter(sel => !sel.existingItemId || sel.qty !== sel.originalQty)
+    if (toProcess.length === 0) { closeAddSheet(); return }
     setAddSaving(true)
     try {
-      for (const sel of selections) {
+      for (const sel of toProcess) {
         if (sel.type === 'product') {
-          await addItem(currentList.id, {
-            product_id: sel.product.id,
-            quantity: String(sel.qty),
-            unit: sel.product.default_unit || undefined,
-          })
+          if (sel.existingItemId) {
+            await updateItem(currentList.id, sel.existingItemId, { quantity: String(sel.qty) })
+          } else {
+            await addItem(currentList.id, {
+              product_id: sel.product.id,
+              quantity: String(sel.qty),
+              unit: sel.product.default_unit || undefined,
+            })
+          }
         } else {
-          await addItem(currentList.id, {
-            custom_name: sel.name,
-            quantity: String(sel.qty),
-          })
+          if (sel.existingItemId) {
+            await updateItem(currentList.id, sel.existingItemId, { quantity: String(sel.qty) })
+          } else if (sel.addToCatalogue) {
+            const newProduct = await createProduct({ name: sel.name })
+            await addItem(currentList.id, { product_id: newProduct.id, quantity: String(sel.qty) })
+          } else {
+            await addItem(currentList.id, { custom_name: sel.name, quantity: String(sel.qty) })
+          }
         }
       }
       closeAddSheet()
@@ -479,7 +515,7 @@ export default function ShoppingPage() {
           {/* FAB + — masqué quand le sheet est ouvert */}
           {!showAddSheet && (
             <button
-              onClick={() => setShowAddSheet(true)}
+              onClick={openAddSheet}
               aria-label="Ajouter un article"
               style={{
                 position: 'fixed', bottom: 72, right: 20,
@@ -563,7 +599,19 @@ export default function ShoppingPage() {
               >
                 <div style={{ flex: 1, minWidth: 0 }}>
                   <div style={{ fontFamily: 'var(--font-ui)', fontSize: 15, color: 'var(--ink-1)', overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}>{s.name}</div>
-                  <div style={{ fontFamily: 'var(--font-mono)', fontSize: 11, color: 'var(--ink-3)', marginTop: 2 }}>article libre</div>
+                  {!s.existingItemId ? (
+                    <label style={{ display: 'flex', alignItems: 'center', gap: 5, marginTop: 3, cursor: 'pointer' }} onClick={e => e.stopPropagation()}>
+                      <input
+                        type="checkbox"
+                        checked={s.addToCatalogue}
+                        onChange={() => toggleCatalogue(s.name)}
+                        style={{ accentColor: 'var(--accent)', width: 14, height: 14, cursor: 'pointer', flexShrink: 0 }}
+                      />
+                      <span style={{ fontFamily: 'var(--font-ui)', fontSize: 11, color: 'var(--ink-3)' }}>Ajouter au catalogue</span>
+                    </label>
+                  ) : (
+                    <div style={{ fontFamily: 'var(--font-mono)', fontSize: 11, color: 'var(--ink-3)', marginTop: 2 }}>article libre</div>
+                  )}
                 </div>
                 <QtyControls
                   qty={s.qty}
@@ -632,22 +680,27 @@ export default function ShoppingPage() {
           </div>
 
           {/* Bouton confirm sticky */}
-          <div style={{ padding: '12px 16px', borderTop: '1px solid var(--bg-4)', flexShrink: 0 }}>
-            <button
-              onClick={() => void handleConfirmAdd()}
-              disabled={selections.length === 0 || addSaving}
-              style={{
-                width: '100%', padding: '14px', borderRadius: 12, border: 'none',
-                background: selections.length === 0 ? 'var(--bg-4)' : 'var(--accent)',
-                color: selections.length === 0 ? 'var(--ink-4)' : '#1d2021',
-                fontFamily: 'var(--font-ui)', fontWeight: 700, fontSize: 16,
-                cursor: selections.length === 0 ? 'default' : 'pointer',
-                minHeight: 52, transition: 'background 0.15s',
-              }}
-            >
-              {addSaving ? 'Ajout en cours…' : selections.length === 0 ? 'Sélectionner des articles' : `Ajouter (${selections.length})`}
-            </button>
-          </div>
+          {(() => {
+            const actionCount = selections.filter(sel => !sel.existingItemId || sel.qty !== sel.originalQty).length
+            return (
+              <div style={{ padding: '12px 16px', borderTop: '1px solid var(--bg-4)', flexShrink: 0 }}>
+                <button
+                  onClick={() => void handleConfirmAdd()}
+                  disabled={actionCount === 0 || addSaving}
+                  style={{
+                    width: '100%', padding: '14px', borderRadius: 12, border: 'none',
+                    background: actionCount === 0 ? 'var(--bg-4)' : 'var(--accent)',
+                    color: actionCount === 0 ? 'var(--ink-4)' : '#1d2021',
+                    fontFamily: 'var(--font-ui)', fontWeight: 700, fontSize: 16,
+                    cursor: actionCount === 0 ? 'default' : 'pointer',
+                    minHeight: 52, transition: 'background 0.15s',
+                  }}
+                >
+                  {addSaving ? 'Enregistrement…' : actionCount === 0 ? 'Aucune modification' : `Confirmer (${actionCount})`}
+                </button>
+              </div>
+            )
+          })()}
         </BottomSheet>
       )}