diff --git a/assets/js/app.js b/assets/js/app.js
index d2322b6..dbd71e3 100644
--- a/assets/js/app.js
+++ b/assets/js/app.js
@@ -5991,10 +5991,6 @@ function setReviewConfirmed(inventoryId) {
     api('app_settings_save', {}, 'POST', { settings: { review_confirmed: c } }).catch(() => {});
 }
 
-/** Return map of product IDs the user has marked as "no expiry needed". */
-function _getNoExpiryDismissed() {
-    return _noExpiryDismissedCache || {};
-}
 /** Permanently mark a product as "no expiry needed" for this browser. */
 function _dismissNoExpiry(productId) {
     const m = Object.assign({}, _noExpiryDismissedCache || {});
@@ -6002,6 +5998,31 @@ function _dismissNoExpiry(productId) {
     _noExpiryDismissedCache = m;
     _saveToServer('no_expiry_dismissed', m);
 }
+/** Remove the "no expiry needed" mark for a product (e.g. user unchecks the box). */
+function _undismissNoExpiry(productId) {
+    const m = Object.assign({}, _noExpiryDismissedCache || {});
+    delete m[String(productId)];
+    _noExpiryDismissedCache = m;
+    _saveToServer('no_expiry_dismissed', m);
+}
+/** Build the "Ne se périme pas" toggle HTML for an expiry date input. */
+function _noExpiryCheckboxHtml(expiryInputId, checked = false) {
+    return `
+        <label class="toggle-row">
+            <span>♾️ Ne se périme pas</span>
+            <span class="toggle-switch">
+                <input type="checkbox" id="${expiryInputId}-no-expiry" ${checked ? 'checked' : ''} onchange="toggleNoExpiryField('${expiryInputId}', this.checked)">
+                <span class="toggle-slider"></span>
+            </span>
+        </label>
+    `;
+}
+function toggleNoExpiryField(expiryInputId, isChecked) {
+    const input = document.getElementById(expiryInputId);
+    if (!input) return;
+    input.disabled = isChecked;
+    if (isChecked) input.value = '';
+}
 
 // === ALERT BANNER SYSTEM (replaces old review table) ===
 let _bannerQueue = [];   // array of { type, data } — 'review' or 'prediction'
@@ -7704,7 +7725,8 @@ window._editingProduct = {
             </div>
             <div class="form-group">
                 <label>${t('inventory.label_expiry')}</label>
-                <input type="date" id="edit-expiry" value="${item.expiry_date || ''}" class="form-input">
+                <input type="date" id="edit-expiry" value="${item.expiry_date || ''}" class="form-input" ${(!item.expiry_date && _getNoExpiryDismissed()[String(item.product_id)]) ? 'disabled' : ''}>
+                ${_noExpiryCheckboxHtml('edit-expiry', !item.expiry_date && !!_getNoExpiryDismissed()[String(item.product_id)])}
             </div>
             <div class="form-group">
                 <label class="toggle-row">
@@ -7763,7 +7785,9 @@ async function submitEditInventory(e, id, productId) {
     }
     const qty = parseFloat(document.getElementById('edit-qty').value);
     const loc = document.getElementById('edit-loc').value;
-    const expiry = document.getElementById('edit-expiry').value || null;
+    const noExpiryChecked = document.getElementById('edit-expiry-no-expiry')?.checked || false;
+    if (noExpiryChecked) _dismissNoExpiry(productId); else _undismissNoExpiry(productId);
+    const expiry = noExpiryChecked ? null : (document.getElementById('edit-expiry').value || null);
     const unit = document.getElementById('edit-unit').value;
 
     if (unit === 'conf') {
@@ -9657,7 +9681,8 @@ function editActionInventoryItem(inventoryId) {
             </div>
             <div class="form-group">
                 <label>${t('inventory.label_expiry')}</label>
-                <input type="date" id="action-edit-expiry" value="${item.expiry_date || ''}" class="form-input">
+                <input type="date" id="action-edit-expiry" value="${item.expiry_date || ''}" class="form-input" ${(!item.expiry_date && _getNoExpiryDismissed()[String(item.product_id)]) ? 'disabled' : ''}>
+                ${_noExpiryCheckboxHtml('action-edit-expiry', !item.expiry_date && !!_getNoExpiryDismissed()[String(item.product_id)])}
             </div>
             <div class="form-group">
                 <label class="toggle-row">
@@ -9690,7 +9715,9 @@ async function submitActionEditInventory(e, id, productId) {
     e.preventDefault();
     const qty = parseFloat(document.getElementById('action-edit-qty').value);
     const loc = document.getElementById('action-edit-loc').value;
-    const expiry = document.getElementById('action-edit-expiry').value || null;
+    const noExpiryChecked = document.getElementById('action-edit-expiry-no-expiry')?.checked || false;
+    if (noExpiryChecked) _dismissNoExpiry(productId); else _undismissNoExpiry(productId);
+    const expiry = noExpiryChecked ? null : (document.getElementById('action-edit-expiry').value || null);
     const unit = document.getElementById('action-edit-unit').value;
     
     const payload = { id, quantity: qty, location: loc, expiry_date: expiry, unit, product_id: productId,
@@ -10089,6 +10116,7 @@ function showAddForm() {
                 <button type="button" class="btn btn-accent btn-scan-expiry" onclick="scanExpiryWithAI()" title="${t('add.scan_expiry_title')}">📷</button>
             </div>
             <p class="form-hint">${t('add.hint_modify')}</p>
+            ${_noExpiryCheckboxHtml('add-expiry')}
         </div>
         <div id="multi-batch-section" style="display:${unit === 'conf' ? 'block' : 'none'}">
             <div id="multi-batch-container"></div>
@@ -10400,6 +10428,7 @@ function selectPurchaseType(btn, type) {
                 <button type="button" class="btn btn-accent btn-scan-expiry" onclick="scanExpiryWithAI()" title="${t('add.scan_expiry_title')}">📷</button>
             </div>
             <p class="form-hint">${t('add.hint_modify')}</p>
+            ${_noExpiryCheckboxHtml('add-expiry')}
         `;
         // Restore quantity - switching purchase type should NOT change it
         document.getElementById('add-quantity').value = currentQty;
@@ -10416,6 +10445,7 @@ function selectPurchaseType(btn, type) {
                     <button type="button" class="btn btn-accent btn-scan-expiry" onclick="scanExpiryWithAI()" title="${t('add.scan_expiry_title')}">📷</button>
                 </div>
                 <p class="form-hint">${t('product.expiry_hint')}</p>
+                ${_noExpiryCheckboxHtml('add-expiry')}
             </div>
             <div class="form-group">
                 <label>${t('add.remaining_label')}</label>
@@ -10586,11 +10616,13 @@ async function submitAdd(e) {
     showLoading(true);
 
     try {
+        const noExpiryChecked = document.getElementById('add-expiry-no-expiry')?.checked || false;
+        if (noExpiryChecked) _dismissNoExpiry(currentProduct.id);
         const result = await api('inventory_add', {}, 'POST', {
             product_id: currentProduct.id,
             quantity: parseFloat(document.getElementById('add-quantity').value) || 1,
             location: document.getElementById('add-location').value,
-            expiry_date: document.getElementById('add-expiry').value || null,
+            expiry_date: noExpiryChecked ? null : (document.getElementById('add-expiry').value || null),
             expiry_user_set: _expiryUserSetPayload('add-expiry'),
             unit: selectedUnit !== productUnit ? selectedUnit : null,
             package_unit: selectedUnit === 'conf' ? (document.getElementById('add-conf-unit')?.value || null) : null,