fix: barcode EAN checksum validation + recipe persons dialog conflict

- Manual barcode input now blocks on invalid EAN checksum (was warning-only) - Native BarcodeDetector now validates EAN/UPC checksum before confirming - Renamed duplicate adjustRecipePersons (rescaler) to scaleRecipePersons to restore +/- buttons in the recipe generation dialog - Added error.barcode_checksum translation key (all 5 languages) - Bump version to v1.7.35
2026-06-02 08:58:48 +00:00
parent 94e98bc79f
commit 7104483dac
9 changed files with 442 additions and 78 deletions
@@ -11,6 +11,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0

 - **Recipe scraps tips** — During cooking steps, detect "waste" generated (peels, cores, bones, eggshells, coffee grounds, citrus zest, etc.) and surface AI-powered tips on how to reuse them (compost, natural cleaner, broth, candied peel, etc.). Could be shown as an optional collapsible hint card below the step that generates the scrap.

+## [1.7.35] - 2026-06-02
+
+### Fixed
+- **Barcode scanner accepts invalid codes** — Manual barcode input with an incorrect EAN checksum now blocks the lookup and shows an error (previously showed a warning but proceeded anyway). The native `BarcodeDetector` path now also validates EAN-8/EAN-13/UPC checksum before confirming a scan, consistent with the Quagga fallback which already did this check.
+- **Recipe persons +/− buttons stopped working in the generation dialog** — A duplicate `adjustRecipePersons` function added for the post-generation rescaler was overriding the one that updated the persons input in the recipe setup dialog. The rescaler is now named `scaleRecipePersons` to avoid the conflict.
+
 ## [1.7.34] - 2026-05-30

 ### Added
@@ -2085,13 +2085,15 @@ function _showScanConfirm(name) {

 // ===== AI NUMBER OCR (Gemini reads printed barcode digits) =====
 let _numOcrRunning = false;
-async function _tryGeminiNumberOCR() {
+async function _tryGeminiNumberOCR(options = {}) {
+    const { chainToVisual = false } = options;
    if (_numOcrRunning || !_requireGemini()) return;
    const video = document.getElementById('scanner-video');
    if (!video || !video.videoWidth) { showToast(t('error.camera'), 'error'); return; }
    _numOcrRunning = true;
    const btn = document.getElementById('scan-num-ocr-btn');
    if (btn) { btn.disabled = true; btn.textContent = t('scan.num_ocr_searching'); }
+    _setScanStatus(t('scan.status_ocr_searching'), 'retry', t('scan.method_ai_ocr'));
    try {
        const canvas = document.createElement('canvas');
        canvas.width = video.videoWidth;
@@ -2100,12 +2102,28 @@ async function _tryGeminiNumberOCR() {
        const imageBase64 = canvas.toDataURL('image/jpeg', 0.88).split(',')[1];
        const result = await api('gemini_number_ocr', {}, 'POST', { image: imageBase64 });
        if (result.barcode) {
+            scanLog(`AI OCR: found barcode ${result.barcode}`);
            showToast(t('scan.num_ocr_found').replace('{code}', result.barcode), 'success');
            onBarcodeDetected(result.barcode);
        } else {
-            showToast(t('scan.num_ocr_not_found'), 'warning');
+            scanLog('AI OCR: barcode digits not found');
+            if (chainToVisual && scannerStream && !_aiFallbackExhausted) {
+                scanLog('AI OCR failed — switching to visual product identification');
+                _setScanStatus(t('scan.status_ai_visual_searching'), 'retry', t('scan.method_ai_vision'));
+                await _tryGeminiVisualBarcode();
+            } else {
+                showToast(t('scan.num_ocr_not_found'), 'warning');
+                _setScanStatus(t('scan.status_scanning'), '', '');
+            }
        }
    } catch(e) {
+        scanLog(`AI OCR error: ${e.message}`);
+        if (chainToVisual && scannerStream && !_aiFallbackExhausted) {
+            _setScanStatus(t('scan.status_ai_visual_searching'), 'retry', t('scan.method_ai_vision'));
+            await _tryGeminiVisualBarcode();
+        } else {
+            _setScanStatus(t('scan.status_scanning'), '', '');
+        }
        showToast(t('error.connection'), 'error');
    } finally {
        _numOcrRunning = false;
@@ -2115,23 +2133,175 @@ async function _tryGeminiNumberOCR() {

 // ===== AI VISUAL PRODUCT IDENTIFICATION (auto-fallback after 5s) =====
 let _aiBarcodeVisualRunning = false;
+let _aiDetectedProductDraft = null;
+let _aiInventoryCandidates = [];
+
+function _showScanAiOverlay(msg) {
+    const el = document.getElementById('scan-ai-overlay');
+    const msgEl = document.getElementById('scan-ai-overlay-msg');
+    if (el) el.style.display = 'flex';
+    if (msgEl) msgEl.textContent = msg || '';
+}
+function _hideScanAiOverlay() {
+    const el = document.getElementById('scan-ai-overlay');
+    if (el) el.style.display = 'none';
+}
+function _showAiRetryButton() {
+    const btn = document.getElementById('scan-ai-retry-btn');
+    if (btn) btn.style.display = '';
+}
+function _clearAiMatchPanel() {
+    const result = document.getElementById('scan-result');
+    if (!result) return;
+    result.style.display = 'none';
+    result.innerHTML = '';
+    _aiDetectedProductDraft = null;
+    _aiInventoryCandidates = [];
+}
+function _renderAiCandidateRow(item, idx) {
+    const catIcon = CATEGORY_ICONS[mapToLocalCategory(item.category, item.name)] || '📦';
+    const qty = (item.total_qty !== null && item.total_qty !== undefined)
+        ? `${parseFloat(item.total_qty)} ${item.unit || ''}`.trim()
+        : '';
+    return `
+        <button class="scan-ai-candidate-item" type="button" onclick="_selectAiInventoryCandidate(${idx})">
+            <span class="scan-ai-candidate-icon">${catIcon}</span>
+            <span class="scan-ai-candidate-info">
+                <span class="scan-ai-candidate-name">${escapeHtml(item.name || '')}</span>
+                <span class="scan-ai-candidate-meta">${escapeHtml((item.brand || '') + (qty ? ' · ' + qty : ''))}</span>
+            </span>
+            <span class="scan-ai-candidate-cta">${t('scan.ai_match_use_btn')}</span>
+        </button>
+    `;
+}
+function _showAiMatchChoices(aiProduct, candidates) {
+    const result = document.getElementById('scan-result');
+    if (!result) return;
+    const aiName = aiProduct?.name || t('product.not_recognized');
+    const aiBrand = aiProduct?.brand || '';
+    const catIcon = CATEGORY_ICONS[mapToLocalCategory(aiProduct?.category || '', aiName)] || '📦';
+    const itemsHtml = (candidates || []).slice(0, 3).map((it, i) => _renderAiCandidateRow(it, i)).join('');
+
+    result.innerHTML = `
+        <div class="scan-ai-match-box">
+            <div class="scan-ai-match-head">
+                <div class="scan-ai-match-title">${t('scan.ai_match_title')}</div>
+                <div class="scan-ai-match-subtitle">${t('scan.ai_match_subtitle')}</div>
+            </div>
+
+            ${itemsHtml ? `
+                <div class="scan-ai-match-list-wrap">
+                    <div class="scan-ai-match-list-title">${t('scan.ai_match_existing')}</div>
+                    <div class="scan-ai-match-list">${itemsHtml}</div>
+                </div>
+            ` : `
+                <div class="scan-ai-match-empty">${t('scan.ai_match_none')}</div>
+            `}
+
+            <button class="btn btn-primary scan-ai-add-btn" type="button" onclick="_confirmAiDetectedProduct()">
+                ${t('scan.ai_match_add_btn').replace('{name}', escapeHtml(aiName))}
+            </button>
+            <div class="scan-ai-detected-label">${t('scan.ai_detected_label')}</div>
+            <div class="scan-ai-detected-pill">${catIcon} ${escapeHtml(aiName)}${aiBrand ? ' · ' + escapeHtml(aiBrand) : ''}</div>
+        </div>
+    `;
+    result.style.display = 'block';
+}
+async function _confirmAiDetectedProduct() {
+    const p = _aiDetectedProductDraft;
+    if (!p) return;
+    showLoading(true);
+    try {
+        const saveResult = await api('product_save', {}, 'POST', {
+            barcode: '',
+            name: p.name || t('product.not_recognized'),
+            brand: p.brand || '',
+            category: p.category || '',
+            image_url: '',
+            unit: 'pz',
+            default_quantity: 1,
+            package_unit: '',
+            notes: '',
+        });
+        if (saveResult.id) {
+            currentProduct = {
+                id: saveResult.id,
+                barcode: '',
+                name: p.name || t('product.not_recognized'),
+                brand: p.brand || '',
+                category: p.category || '',
+                image_url: '',
+                unit: 'pz',
+                default_quantity: 1,
+                package_unit: '',
+                _confCount: 0,
+                weight_info: '',
+            };
+            addToScanRecents(currentProduct);
+            _clearAiMatchPanel();
+            showLoading(false);
+            setTimeout(() => showProductAction(), 250);
+        } else {
+            showLoading(false);
+            showToast(t('error.connection'), 'error');
+        }
+    } catch (_) {
+        showLoading(false);
+        showToast(t('error.connection'), 'error');
+    }
+}
+function _selectAiInventoryCandidate(idx) {
+    const p = _aiInventoryCandidates[idx];
+    if (!p) return;
+    currentProduct = {
+        id: p.id,
+        barcode: p.barcode || '',
+        name: p.name || '',
+        brand: p.brand || '',
+        category: p.category || '',
+        image_url: p.image_url || '',
+        unit: p.unit || 'pz',
+        default_quantity: p.default_quantity || 1,
+        package_unit: p.package_unit || '',
+        _confCount: 0,
+        weight_info: '',
+    };
+    if (p.notes) {
+        const pesoMatch = p.notes.match(/Peso:\s*([^·]+)/);
+        if (pesoMatch) currentProduct.weight_info = pesoMatch[1].trim();
+    }
+    addToScanRecents(currentProduct);
+    _clearAiMatchPanel();
+    setTimeout(() => showProductAction(), 250);
+}
+async function _retryAiScan() {
+    const btn = document.getElementById('scan-ai-retry-btn');
+    if (btn) btn.style.display = 'none';
+    _aiFallbackExhausted = false;
+    _clearAiMatchPanel();
+    await _tryGeminiNumberOCR({ chainToVisual: true });
+}
+
 async function _tryGeminiVisualBarcode() {
    if (_aiBarcodeVisualRunning || !_requireGemini()) return;
    const video = document.getElementById('scanner-video');
    if (!video || !video.videoWidth) return;

+    // ★ Capture the frame BEFORE stopping the stream — after stopScanner() the
+    //   video element is blanked and drawImage would send a black image to Gemini.
+    const canvas = document.createElement('canvas');
+    canvas.width  = video.videoWidth;
+    canvas.height = video.videoHeight;
+    canvas.getContext('2d').drawImage(video, 0, 0);
+    const imageBase64 = canvas.toDataURL('image/jpeg', 0.88).split(',')[1];
+    if (!imageBase64) { scanLog('AI visual: failed to capture frame'); return; }
+
    _aiBarcodeVisualRunning = true;
-    stopScanner(); // stop scanner loop while AI processes
-    _setScanStatus(t('scan.ai_fallback_searching'), 'retry', 'Gemini Vision');
-    showLoading(true);
+    stopScanner(); // stop scanner loop while AI processes (stream already captured above)
+    _setScanStatus(t('scan.status_ai_visual_searching'), 'retry', t('scan.method_ai_vision'));
+    _showScanAiOverlay(t('scan.ai_overlay_msg'));

    try {
-        const canvas = document.createElement('canvas');
-        canvas.width  = video.videoWidth;
-        canvas.height = video.videoHeight;
-        canvas.getContext('2d').drawImage(video, 0, 0);
-        const imageBase64 = canvas.toDataURL('image/jpeg', 0.88).split(',')[1];
-
        const result = await api('gemini_barcode_visual', {}, 'POST', {
            image: imageBase64,
            lang: _currentLang || 'it',
@@ -2140,54 +2310,40 @@ async function _tryGeminiVisualBarcode() {
        if (result.found && result.product) {
            const p = result.product;
            scanLog(`AI visual: found "${p.name}" (${p.brand})`);
+            _hideScanAiOverlay();
            showToast(t('scan.ai_fallback_found'), 'success');
-            // Build a synthetic product (no barcode) and show the inventory form
-            const saveResult = await api('product_save', {}, 'POST', {
-                barcode: '',
-                name:    p.name || t('product.not_recognized'),
-                brand:   p.brand || '',
+            _aiDetectedProductDraft = {
+                name: p.name || t('product.not_recognized'),
+                brand: p.brand || '',
                category: p.category || '',
-                image_url: '',
-                unit: 'pz',
-                default_quantity: 1,
-                package_unit: '',
-                notes: '',
-            });
-            if (saveResult.id) {
-                currentProduct = {
-                    id: saveResult.id,
-                    barcode: '',
-                    name: p.name || t('product.not_recognized'),
-                    brand: p.brand || '',
-                    category: p.category || '',
-                    image_url: '',
-                    unit: 'pz',
-                    default_quantity: 1,
-                    package_unit: '',
-                    _confCount: 0,
-                    weight_info: '',
-                };
-                addToScanRecents(currentProduct);
-                showLoading(false);
-                setTimeout(() => showProductAction(), 300);
-            } else {
-                showLoading(false);
-                showToast(t('error.connection'), 'error');
+            };
+            let candidates = [];
+            try {
+                const invRes = await api('inventory_search', {
+                    q: _aiDetectedProductDraft.name,
+                    limit: 3,
+                });
+                candidates = (invRes.items || []).slice(0, 3);
+            } catch (_) {
+                candidates = [];
            }
+            _aiInventoryCandidates = candidates;
+            _showAiMatchChoices(_aiDetectedProductDraft, candidates);
        } else {
            scanLog('AI visual: product not identified — exhausted for this session');
            _aiFallbackExhausted = true;
-            showLoading(false);
+            _hideScanAiOverlay();
            _setScanStatus(t('scan.ai_fallback_exhausted'), 'retry', '');
-            // Restart the scanner so the user can keep trying with the barcode reader,
-            // but the 5s AI timer will NOT fire again (_aiFallbackExhausted=true).
+            _showAiRetryButton();
+            // Restart barcode scanner — AI timer won't fire again (_aiFallbackExhausted=true).
            setTimeout(() => initScanner(), 300);
        }
    } catch (e) {
        scanLog(`AI visual error: ${e.message}`);
        _aiFallbackExhausted = true;
-        showLoading(false);
+        _hideScanAiOverlay();
        _setScanStatus(t('scan.ai_fallback_exhausted'), 'retry', '');
+        _showAiRetryButton();
        setTimeout(() => initScanner(), 300);
    } finally {
        _aiBarcodeVisualRunning = false;
@@ -3837,6 +3993,18 @@ async function api(action, params = {}, method = 'GET', body = null, extraHeader
 // Track current page for auto-refresh
 let _currentPageId = 'dashboard';
 let _currentPageParam = null;
+let _pageHistory = [{ pageId: 'dashboard', param: null }];
+
+function goBack(fallbackPage = 'dashboard') {
+    if (_pageHistory.length > 1) {
+        // Drop current page and navigate to the previous entry without re-adding history.
+        _pageHistory.pop();
+        const prev = _pageHistory[_pageHistory.length - 1] || { pageId: fallbackPage, param: null };
+        showPage(prev.pageId, prev.param, { skipHistory: true });
+        return;
+    }
+    showPage(fallbackPage, null, { skipHistory: true });
+}

 // Refresh current page data without full navigation
 function refreshCurrentPage() {
@@ -3854,7 +4022,17 @@ function refreshCurrentPage() {
    }
 }

-function showPage(pageId, param = null) {
+function showPage(pageId, param = null, options = {}) {
+    const skipHistory = !!options.skipHistory;
+    if (!skipHistory) {
+        const last = _pageHistory[_pageHistory.length - 1];
+        const sameAsLast = !!last && last.pageId === pageId && (last.param ?? null) === (param ?? null);
+        if (!sameAsLast) {
+            _pageHistory.push({ pageId, param });
+            if (_pageHistory.length > 80) _pageHistory.shift();
+        }
+    }
+
    _currentPageId = pageId;
    _currentPageParam = param;
    // Hide all pages
@@ -3886,7 +4064,7 @@ function showPage(pageId, param = null) {
            }
            loadInventory();
            break;
-        case 'scan': _aiFallbackExhausted = false; initScanner(); clearQuickNameResults(); updateSpesaBanner(); updateScanRecents(); switchScanTab('barcode');
+        case 'scan': _aiFallbackExhausted = false; _hideScanAiOverlay(); { const _rb = document.getElementById('scan-ai-retry-btn'); if (_rb) _rb.style.display = 'none'; } initScanner(); clearQuickNameResults(); updateSpesaBanner(); updateScanRecents(); switchScanTab('barcode');
            // Pre-warm the embedding model the first time user visits scan page
            if (typeof window._getCategoryPipeline === 'function' && !window._categoryPipelineReady) {
                window._getCategoryPipeline(); // fire-and-forget
@@ -5031,10 +5209,11 @@ async function loadBannerAlerts() {
    if (!banner) { _bannerLoading = false; console.warn('[Banner] #alert-banner not found'); return; }

    try {
-        const [invData, predData, anomalyData, finishedData, statsData] = await Promise.all([
+        const [invData, predData, anomalyData, dupLossData, finishedData, statsData] = await Promise.all([
            api('inventory_list'),
            api('consumption_predictions').catch(err => { console.warn('[Banner] predictions fetch failed:', err); return { predictions: [] }; }),
            api('inventory_anomalies').catch(err => { console.warn('[Banner] anomalies fetch failed:', err); return { anomalies: [] }; }),
+            api('inventory_duplicate_loss_checks').catch(err => { console.warn('[Banner] duplicate loss checks fetch failed:', err); return { checks: [] }; }),
            api('inventory_finished_items').catch(err => { console.warn('[Banner] finished_items fetch failed:', err); return { finished: [] }; }),
            api('stats').catch(() => ({ opened: [] })),
        ]);
@@ -5158,14 +5337,21 @@ async function loadBannerAlerts() {
            _bannerQueue.push({ type: 'anomaly', data: an });
        });

-        // 6. Finished products: inventory hit 0, waiting for user confirmation
+        // 6. Potentially lost products due to rapid duplicate "out" events
+        const dupChecks = dupLossData.checks || [];
+        dupChecks.forEach(ch => {
+            if (confirmed['dup_' + ch.dismiss_key]) return;
+            _bannerQueue.push({ type: 'dup_loss_check', data: ch });
+        });
+
+        // 7. Finished products: inventory hit 0, waiting for user confirmation
        const finished = finishedData.finished || [];
        finished.forEach(fin => {
            if (confirmed['fin_' + fin.product_id]) return;
            _bannerQueue.push({ type: 'finished', data: fin });
        });

-        // 7. Products with no expiry date set (and not permanently dismissed)
+        // 8. Products with no expiry date set (and not permanently dismissed)
        // Warn for ALL food/drink items — only skip igiene/pulizia (non-food).
        // Items are capped at 8 per load (opened packages first) to avoid banner overflow.
        const noExpiryDismissed = _getNoExpiryDismissed();
@@ -5246,6 +5432,8 @@ function _bannerPriority(entry) {
            // Phantom (inflated qty) = 250, Missing = 260 (slightly higher, means data is clearly wrong)
            return entry.data.direction === 'missing' ? 260 : 250;
        }
+        case 'dup_loss_check':
+            return 700; // high-priority check: likely double-consume loss
        case 'finished':
            return 600; // product ran out — confirm before removing from DB
        case 'no_expiry':
@@ -5447,6 +5635,30 @@ function renderBannerItem() {
        }
        actionsEl.innerHTML = btns;

+    } else if (entry.type === 'dup_loss_check') {
+        const ch = entry.data;
+        banner.className = 'alert-banner banner-dup-loss';
+        iconEl.textContent = '🧪';
+
+        const locInfo = LOCATIONS[ch.location] || { icon: '📦', label: ch.location || '—' };
+        const locText = `${locInfo.icon} ${locInfo.label}`;
+        const qtyPair = `${ch.q1} + ${ch.q2}`;
+
+        titleEl.textContent = t('dashboard.banner_dup_loss_title').replace('{name}', ch.name);
+        detailEl.textContent = t('dashboard.banner_dup_loss_detail')
+            .replace('{location}', locText)
+            .replace('{seconds}', Math.round(ch.dt_sec || 0))
+            .replace('{qty_pair}', qtyPair);
+
+        let btns = '';
+        if (ch.inventory_id && ch.inventory_id > 0) {
+            btns += `<button class="btn-banner btn-banner-edit" onclick="editReviewItem(${ch.inventory_id}, ${ch.product_id})">${t('dashboard.banner_dup_loss_action_fix')}</button>`;
+        } else {
+            btns += `<button class="btn-banner btn-banner-edit" onclick="openDuplicateLossCheck(${ch.product_id})">${t('dashboard.banner_dup_loss_action_open')}</button>`;
+        }
+        btns += `<button class="btn-banner btn-banner-ok" onclick="dismissDuplicateLossCheck()">${t('dashboard.banner_dup_loss_action_done')}</button>`;
+        actionsEl.innerHTML = btns;
+
    } else if (entry.type === 'no_expiry') {
        const item = entry.data;
        banner.className = 'alert-banner banner-no-expiry';
@@ -5584,6 +5796,32 @@ function dismissBannerAnomaly() {
    dismissBannerItem();
 }

+function dismissDuplicateLossCheck() {
+    const entry = _bannerQueue[_bannerIndex];
+    if (!entry || entry.type !== 'dup_loss_check') return;
+    const key = entry.data.dismiss_key;
+    setReviewConfirmed('dup_' + key);
+    showToast(t('dashboard.banner_dup_loss_toast_done'), 'success');
+    dismissBannerItem();
+}
+
+async function openDuplicateLossCheck(productId) {
+    showLoading(true);
+    try {
+        const data = await api('product_get', { id: productId });
+        if (data.product) {
+            currentProduct = data.product;
+            showProductAction();
+        } else {
+            showToast(t('error.not_found'), 'error');
+        }
+    } catch (e) {
+        showToast(t('error.connection'), 'error');
+    } finally {
+        showLoading(false);
+    }
+}
+
 function weighBannerItem() {
    const entry = _bannerQueue[_bannerIndex];
    if (!entry) return;
@@ -6585,6 +6823,7 @@ async function initScanner() {
    
    try {
        stopScanner();
+        _clearAiMatchPanel();
        
        const stream = await navigator.mediaDevices.getUserMedia(constraints);
        const track = stream.getVideoTracks()[0];
@@ -6624,8 +6863,8 @@ async function initScanner() {
            clearTimeout(_aiFallbackTimer);
            _aiFallbackTimer = setTimeout(() => {
                if (scannerStream && !_aiFallbackExhausted) { // still scanning — no barcode found yet
-                    scanLog('5s elapsed without barcode — triggering AI visual fallback');
-                    _tryGeminiVisualBarcode();
+                    scanLog('5s elapsed without barcode — triggering AI OCR fallback');
+                    _tryGeminiNumberOCR({ chainToVisual: true });
                }
            }, 5000);
        }
@@ -6739,6 +6978,13 @@ async function startNativeScanner(videoEl) {
                // For other formats (code_128, code_39) require 2 to avoid false reads.
                const highConfidence = ['ean_13','ean_8','upc_a','upc_e'].includes(format);
                if (highConfidence || detectCount >= 2 || detectionHistory[code].count >= 2) {
+                    if (highConfidence && !validateEANChecksum(code)) {
+                        _invalidBarcodeCount++;
+                        scanLog(`Invalid EAN checksum (native): ${code} (retry #${_invalidBarcodeCount})`);
+                        _setScanStatus(t('scan.status_invalid').replace('{code}', code), 'invalid', 'Native');
+                        lastDetected = ''; detectCount = 0;
+                        return;
+                    }
                    scanning = false;
                    quaggaRunning = false;
                    updateFeedback(null);
@@ -6967,6 +7213,7 @@ function stopScanner() {
    if (tb) tb.classList.remove('torch-on');
    // Hide live code
    _hideScanLiveCode();
+    _clearAiMatchPanel();
    // Also stop AI camera
    if (aiStream) {
        aiStream.getTracks().forEach(t => t.stop());
@@ -7133,7 +7380,7 @@ function autoSubmitEAN(inputEl, force = false) {
        if (!raw) { showToast(t('error.barcode_empty'), 'error'); inputEl.focus(); return; }
        if (!/^\d{4,14}$/.test(raw)) { showToast(t('error.barcode_format'), 'error'); inputEl.focus(); return; }
        if (isComplete && !isValid) {
-            showToast('⚠️ Checksum EAN errato — verifica le cifre', 'warning');
+            showToast(t('error.barcode_checksum'), 'error'); inputEl.focus(); return;
        }
        stopScanner();
        onBarcodeDetected(raw);
@@ -7888,7 +8135,7 @@ function showProductAction() {
    
    // Update back button: go back to shopping if came from shopping list scan
    const backBtn = document.getElementById('action-back-btn');
-    if (backBtn) backBtn.onclick = _spesaScanTarget ? () => { _spesaScanTarget = null; showPage('shopping'); } : () => showPage('scan');
+    if (backBtn) backBtn.onclick = () => goBack();

    // Show "shopping target" banner if we came from the shopping list
    const banner = document.getElementById('shopping-scan-target-banner');
@@ -7902,7 +8149,7 @@ function showProductAction() {
            </div>
            <div class="shopping-scan-target-actions">
                <button class="btn btn-success stb-btn" onclick="confirmShoppingItemFound()">✅ ${t('shopping.scan_target_found')}</button>
-                <button class="btn btn-secondary stb-btn" onclick="_spesaScanTarget=null; document.getElementById('shopping-scan-target-banner').style.display='none'; document.getElementById('action-back-btn').onclick=()=>showPage('scan')">✕ ${t('btn.cancel')}</button>
+                <button class="btn btn-secondary stb-btn" onclick="_spesaScanTarget=null; document.getElementById('shopping-scan-target-banner').style.display='none'; document.getElementById('action-back-btn').onclick=()=>goBack()">✕ ${t('btn.cancel')}</button>
            </div>
        `;
    } else if (banner) {
@@ -13666,7 +13913,7 @@ async function toggleRecipeFavorite(btn) {
 * Scale recipe ingredient quantities (#123).
 * Delta: +1 or -1. Min 1, max 20 persons.
 */
-function adjustRecipePersons(delta) {
+function scaleRecipePersons(delta) {
    const newPersons = Math.max(1, Math.min(20, _recipeCurrentPersons + delta));
    if (newPersons === _recipeCurrentPersons) return;
    _recipeCurrentPersons = newPersons;
@@ -13711,9 +13958,9 @@ function renderRecipe(r) {
    html += '<div class="recipe-meta">';
    if (r.meal) html += `<span class="recipe-tag">${_mealLabel(r.meal)}</span>`;
    html += `<span class="recipe-tag recipe-persons-ctrl">
-        <button class="btn-persons-adj" onclick="adjustRecipePersons(-1)">−</button>
+        <button class="btn-persons-adj" onclick="scaleRecipePersons(-1)">−</button>
        <span id="recipe-persons-display">👥 ${r.persons} ${t('recipes.persons_short')}</span>
-        <button class="btn-persons-adj" onclick="adjustRecipePersons(+1)">+</button>
+        <button class="btn-persons-adj" onclick="scaleRecipePersons(+1)">+</button>
    </span>`;
    if (r.prep_time) html += `<span class="recipe-tag">🔪 ${r.prep_time}</span>`;
    if (r.cook_time) html += `<span class="recipe-tag">🔥 ${r.cook_time}</span>`;
@@ -64,7 +64,7 @@
        <div id="preloader-warnings" class="preloader-warnings" style="display:none"></div>
        <div id="preloader-error-msg" class="preloader-error-msg" style="display:none"></div>
        <button id="preloader-retry-btn" class="preloader-retry-btn" style="display:none" onclick="_startupRetry()">🔄 <span data-i18n="startup.retry">Riprova</span></button>
-        <span class="app-preloader-version" id="preloader-version">v1.7.25</span>
+        <span class="app-preloader-version" id="preloader-version">v1.7.35</span>
    </div>
 </div>

@@ -77,7 +77,7 @@
        <!-- Title — left-aligned; grows to fill space -->
        <div class="header-title-wrap">
            <h1 class="header-title" onclick="showPage('dashboard')">
-                <img src="assets/img/logo/logo_icon.png" alt="" class="header-logo-icon" aria-hidden="true" /><span data-i18n="nav.title">EverShelf</span><span class="header-version">v1.7.25</span>
+                <img src="assets/img/logo/logo_icon.png" alt="" class="header-logo-icon" aria-hidden="true" /><span data-i18n="nav.title">EverShelf</span><span class="header-version">v1.7.35</span>
            </h1>
            <!-- Update badge — shown alongside title, never replaces it -->
            <span class="header-update-badge" id="header-update-badge" style="display:none"></span>
@@ -194,7 +194,7 @@
    <!-- ===== INVENTORY LIST ===== -->
    <section class="page" id="page-inventory">
        <div class="page-header">
-            <button class="back-btn" onclick="showPage('dashboard')" data-i18n="btn.back">← Indietro</button>
+            <button class="back-btn" onclick="goBack()" data-i18n="btn.back">← Indietro</button>
            <h2 id="inventory-title" data-i18n="inventory.title">Dispensa</h2>
            <button class="page-header-action-btn" onclick="_showExportModal()" title="Export" data-i18n-title="export.btn_title">📤</button>
        </div>
@@ -225,7 +225,7 @@
    <!-- ===== SCAN PAGE ===== -->
    <section class="page" id="page-scan">
        <div class="page-header">
-            <button class="back-btn" onclick="stopScanner(); showPage('dashboard')" data-i18n="btn.back">← Indietro</button>
+            <button class="back-btn" onclick="goBack()" data-i18n="btn.back">← Indietro</button>
            <h2 data-i18n="scan.title">Scansiona</h2>
            <button class="scan-spesa-chip" id="scan-spesa-btn" onclick="startSpesaMode()" data-i18n="scan.spesa_btn">🛒 Spesa</button>
        </div>
@@ -256,6 +256,14 @@
                    <span id="scan-status-method" class="scan-status-method"></span>
                    <span id="scan-status-msg" class="scan-status-msg" data-i18n="scan.status_ready"></span>
                </div>
+                <!-- AI processing overlay (shown when Gemini Vision is analyzing) -->
+                <div class="scan-ai-overlay" id="scan-ai-overlay" style="display:none">
+                    <div class="scan-ai-overlay-inner">
+                        <div class="loading-spinner"></div>
+                        <span class="scan-ai-overlay-label">Gemini Vision</span>
+                        <span class="scan-ai-overlay-msg" id="scan-ai-overlay-msg"></span>
+                    </div>
+                </div>
                <!-- Success flash overlay -->
                <div class="scan-confirm-overlay" id="scan-confirm-overlay" style="display:none">
                    <div class="scan-confirm-check">✓</div>
@@ -274,6 +282,9 @@
            <!-- Scan errors -->
            <div class="scan-result" id="scan-result" style="display:none"></div>

+            <!-- AI retry button (shown after visual identification fails) -->
+            <button class="btn btn-accent scan-ai-retry-btn" id="scan-ai-retry-btn" style="display:none" onclick="_retryAiScan()" data-i18n="scan.ai_retry_btn">🤖 Riprova con AI</button>
+
            <!-- Recent scans -->
            <div class="scan-recents" id="scan-recents" style="display:none">
                <span class="scan-recents-label" data-i18n="scan.recents_label">Recenti</span>
@@ -333,7 +344,7 @@
    <!-- ===== PRODUCT ACTION (IN/OUT after scan) ===== -->
    <section class="page" id="page-action">
        <div class="page-header">
-            <button class="back-btn" id="action-back-btn" onclick="showPage('scan')" data-i18n="btn.back">← Indietro</button>
+            <button class="back-btn" id="action-back-btn" onclick="goBack()" data-i18n="btn.back">← Indietro</button>
            <h2 data-i18n="action.title">Cosa vuoi fare?</h2>
        </div>
        <!-- Banner: shopping list scan context -->
@@ -356,7 +367,7 @@
    <!-- ===== ADD TO INVENTORY FORM ===== -->
    <section class="page" id="page-add">
        <div class="page-header">
-            <button class="back-btn" onclick="showPage('action')" data-i18n="btn.back">← Indietro</button>
+            <button class="back-btn" onclick="goBack()" data-i18n="btn.back">← Indietro</button>
            <h2 data-i18n="add.title">Aggiungi alla Dispensa</h2>
        </div>
        <div class="product-preview-small" id="add-product-preview"></div>
@@ -419,7 +430,7 @@
    <!-- ===== USE FROM INVENTORY FORM ===== -->
    <section class="page" id="page-use">
        <div class="page-header">
-            <button class="back-btn" onclick="showPage('action')" data-i18n="btn.back">← Indietro</button>
+            <button class="back-btn" onclick="goBack()" data-i18n="btn.back">← Indietro</button>
            <h2 data-i18n="use.title">Usa / Consuma</h2>
        </div>
        <div class="product-preview-small" id="use-product-preview"></div>
@@ -475,7 +486,7 @@
    <!-- ===== MANUAL / EDIT PRODUCT FORM ===== -->
    <section class="page" id="page-product-form">
        <div class="page-header">
-            <button class="back-btn" onclick="showPage('scan')" data-i18n="btn.back">← Indietro</button>
+            <button class="back-btn" onclick="goBack()" data-i18n="btn.back">← Indietro</button>
            <h2 id="product-form-title">Nuovo Prodotto</h2>
        </div>
        <form class="form" onsubmit="submitProduct(event)">
@@ -663,7 +674,7 @@
    <!-- ===== ALL PRODUCTS PAGE ===== -->
    <section class="page" id="page-products">
        <div class="page-header">
-            <button class="back-btn" onclick="showPage('dashboard')" data-i18n="btn.back">← Indietro</button>
+            <button class="back-btn" onclick="goBack()" data-i18n="btn.back">← Indietro</button>
            <h2 data-i18n="products.title">📦 Tutti i Prodotti</h2>
        </div>
        <div class="search-bar">
@@ -675,7 +686,7 @@
    <!-- ===== RECIPE PAGE ===== -->
    <section class="page" id="page-recipe">
        <div class="page-header">
-            <button class="back-btn" onclick="showPage('dashboard')" data-i18n="btn.back">← Indietro</button>
+            <button class="back-btn" onclick="goBack()" data-i18n="btn.back">← Indietro</button>
            <h2 data-i18n="recipes.title">🍳 Ricette</h2>
        </div>
        <div class="recipe-page-container">
@@ -689,7 +700,7 @@
    <!-- ===== SHOPPING LIST (BRING!) PAGE ===== -->
    <section class="page" id="page-shopping">
        <div class="page-header">
-            <button class="back-btn" onclick="showPage('dashboard')" data-i18n="btn.back">← Indietro</button>
+            <button class="back-btn" onclick="goBack()" data-i18n="btn.back">← Indietro</button>
            <h2 data-i18n="shopping.title">🛒 Lista della Spesa</h2>
        </div>
        <div class="shopping-container">
@@ -797,7 +808,7 @@
    <!-- ===== AI IDENTIFICATION PAGE ===== -->
    <section class="page" id="page-ai">
        <div class="page-header">
-            <button class="back-btn" onclick="stopScanner(); showPage('scan')" data-i18n="btn.back">← Indietro</button>
+            <button class="back-btn" onclick="goBack()" data-i18n="btn.back">← Indietro</button>
            <h2 data-i18n="ai.title">🤖 Identificazione AI</h2>
        </div>
        <div class="ai-container">
@@ -835,7 +846,7 @@
    <!-- ===== SETTINGS PAGE ===== -->
    <section class="page" id="page-settings">
        <div class="page-header">
-            <button class="back-btn" onclick="showPage('dashboard')" data-i18n="btn.back">← Indietro</button>
+            <button class="back-btn" onclick="goBack()" data-i18n="btn.back">← Indietro</button>
            <h2 data-i18n="settings.title">⚙️ Configurazione</h2>
        </div>
        <div class="settings-tabs">
@@ -2,7 +2,7 @@
    "name": "EverShelf",
    "short_name": "EverShelf",
    "description": "Gestione completa della dispensa di casa con scansione barcode",
-    "version": "1.7.25",
+    "version": "1.7.35",
    "start_url": "/evershelf/",
    "display": "standalone",
    "background_color": "#f0f4e8",
@@ -151,6 +151,12 @@
    "banner_anomaly_untracked_detail": "Du hast <strong>{inv_qty} {unit}</strong> im Bestand, aber die gebuchten Abgänge übersteigen die Eingänge — der Anfangsbestand wurde wahrscheinlich nie als \"Eingang\" erfasst. Bitte korrigiere die Menge oder trage die fehlenden Eingänge nach.",
    "banner_anomaly_ghost_title": "weniger Bestand als erwartet",
    "banner_anomaly_ghost_detail": "Laut Buchungen solltest du {expected_qty} {unit} von {name} haben, aber der Bestand zeigt nur {inv_qty} {unit}. Hast du etwas ohne Buchung entnommen?",
+    "banner_dup_loss_title": "Prüfung Doppelabbuchung: {name}",
+    "banner_dup_loss_detail": "Mögliche doppelte Buchung in {location}: zwei schnelle Abgänge ({qty_pair}) in ~{seconds}s. Bitte prüfen und ggf. korrigieren.",
+    "banner_dup_loss_action_fix": "Menge korrigieren",
+    "banner_dup_loss_action_open": "Produktkarte öffnen",
+    "banner_dup_loss_action_done": "Bereits geprüft",
+    "banner_dup_loss_toast_done": "Prüfung als erledigt markiert",
    "consumed": "Verbraucht: {n} ({pct}%)",
    "wasted": "Weggeworfen: {n} ({pct}%)",
    "more_opened": "und {n} weitere geöffnet...",
@@ -221,10 +227,23 @@
    "status_invalid": "Ungültig: {code} — versuche erneut",
    "status_confirmed": "Bestätigt!",
    "status_parallel": "Kombinierter Scan aktiv...",
+    "status_ocr_searching": "Ich lese die Barcode-Ziffern...",
+    "status_ai_visual_searching": "Jetzt versuche ich, das Produkt zu erkennen...",
+    "method_ai_ocr": "Gemini OCR",
+    "method_ai_vision": "Gemini Vision",
    "ai_fallback_searching": "KI identifiziert Produkt...",
    "ai_fallback_found": "Produkt von KI erkannt",
    "ai_fallback_not_found": "KI: Produkt nicht erkannt",
-    "ai_fallback_exhausted": "KI: Produkt nicht erkannt — Barcode erneut scannen"
+    "ai_fallback_exhausted": "KI: Produkt nicht erkannt — Barcode erneut scannen",
+    "ai_overlay_msg": "Gemini Vision analysiert das Produkt...",
+    "ai_retry_btn": "Mit KI erneut versuchen",
+    "ai_match_title": "Produkt von KI erkannt",
+    "ai_match_subtitle": "Waehle ein vorhandenes Produkt oder fuege das erkannte hinzu.",
+    "ai_match_existing": "Mogliche Treffer in der Vorratskammer",
+    "ai_match_none": "Keine ahnlichen Produkte in der Vorratskammer gefunden.",
+    "ai_match_use_btn": "Dieses nutzen",
+    "ai_match_add_btn": "\"{name}\" hinzufugen",
+    "ai_detected_label": "KI erkannt"
  },
  "action": {
    "title": "Was möchtest du tun?",
@@ -1069,6 +1088,7 @@
    "ai_quota": "KI-Kontingent erschöpft. Bitte in ein paar Minuten erneut versuchen.",
    "barcode_empty": "Barcode eingeben",
    "barcode_format": "Barcode darf nur Zahlen enthalten (4-14 Ziffern)",
+    "barcode_checksum": "Ungültiger EAN-Prüfziffer — bitte die Barcode-Ziffern prüfen",
    "min_chars": "Mindestens 2 Zeichen eingeben",
    "not_in_inventory": "Produkt nicht im Bestand",
    "appliance_exists": "Gerät bereits vorhanden",
@@ -151,6 +151,12 @@
    "banner_anomaly_untracked_detail": "You have <strong>{inv_qty} {unit}</strong> in inventory, but recorded outflows exceed inflows — the initial stock was likely never added as an \"in\" transaction. You can correct the quantity or log the missing entries.",
    "banner_anomaly_ghost_title": "you have less stock than expected",
    "banner_anomaly_ghost_detail": "Based on recorded operations you should have {expected_qty} {unit} of {name}, but inventory shows only {inv_qty} {unit}. Did you take stock without recording it?",
+    "banner_dup_loss_title": "Double-consume check: {name}",
+    "banner_dup_loss_detail": "Possible duplicate entry in {location}: two close out events ({qty_pair}) in ~{seconds}s. Please verify and fix if needed.",
+    "banner_dup_loss_action_fix": "Fix quantity",
+    "banner_dup_loss_action_open": "Open product card",
+    "banner_dup_loss_action_done": "Already checked",
+    "banner_dup_loss_toast_done": "Check marked as reviewed",
    "consumed": "Consumed: {n} ({pct}%)",
    "wasted": "Wasted: {n} ({pct}%)",
    "more_opened": "and {n} more opened...",
@@ -221,10 +227,23 @@
    "status_invalid": "Invalid: {code} — retrying",
    "status_confirmed": "Confirmed!",
    "status_parallel": "Using combined scan methods...",
+    "status_ocr_searching": "Reading the barcode digits...",
+    "status_ai_visual_searching": "Now trying to recognize the product...",
+    "method_ai_ocr": "Gemini OCR",
+    "method_ai_vision": "Gemini Vision",
    "ai_fallback_searching": "AI identifying product...",
    "ai_fallback_found": "Product identified by AI",
    "ai_fallback_not_found": "AI: product not recognized",
-    "ai_fallback_exhausted": "AI: product not recognized — try scanning the barcode"
+    "ai_fallback_exhausted": "AI: product not recognized — try scanning the barcode",
+    "ai_overlay_msg": "Gemini Vision is analyzing the product...",
+    "ai_retry_btn": "Retry with AI",
+    "ai_match_title": "Product recognized by AI",
+    "ai_match_subtitle": "Choose an existing pantry item or add the detected one.",
+    "ai_match_existing": "Possible pantry matches",
+    "ai_match_none": "No similar pantry products found.",
+    "ai_match_use_btn": "Use this",
+    "ai_match_add_btn": "Add \"{name}\"",
+    "ai_detected_label": "AI detected"
  },
  "action": {
    "title": "What do you want to do?",
@@ -1069,6 +1088,7 @@
    "ai_quota": "AI quota exhausted. Please try again in a few minutes.",
    "barcode_empty": "Enter a barcode",
    "barcode_format": "Barcode must contain only numbers (4-14 digits)",
+    "barcode_checksum": "Invalid EAN checksum — please check the barcode digits",
    "min_chars": "Type at least 2 characters",
    "not_in_inventory": "Product not in inventory",
    "appliance_exists": "Appliance already exists",
@@ -149,6 +149,12 @@
    "banner_anomaly_untracked_detail": "Tienes <strong>{inv_qty} {unit}</strong> en inventario, pero las salidas registradas superan las entradas — el stock inicial probablemente nunca se añadió como transacción «entrada». Puedes corregir la cantidad o registrar las entradas faltantes.",
    "banner_anomaly_ghost_title": "tienes menos stock del esperado",
    "banner_anomaly_ghost_detail": "Según las operaciones registradas deberías tener {expected_qty} {unit} de {name}, pero el inventario solo muestra {inv_qty} {unit}. ¿Tomaste stock sin registrarlo?",
+    "banner_dup_loss_title": "Control de doble salida: {name}",
+    "banner_dup_loss_detail": "Posible registro duplicado en {location}: dos salidas seguidas ({qty_pair}) en ~{seconds}s. Revisa y corrige si hace falta.",
+    "banner_dup_loss_action_fix": "Corregir cantidad",
+    "banner_dup_loss_action_open": "Abrir ficha del producto",
+    "banner_dup_loss_action_done": "Ya revisado",
+    "banner_dup_loss_toast_done": "Control marcado como revisado",
    "consumed": "Consumido: {n} ({pct}%)",
    "wasted": "Desperdiciado: {n} ({pct}%)",
    "more_opened": "y {n} más abiertos...",
@@ -218,10 +224,23 @@
    "status_invalid": "Inválido: {code} — reintentando",
    "status_confirmed": "Confirmado!",
    "status_parallel": "Escaneo combinado activo...",
+    "status_ocr_searching": "Estoy leyendo los números del código de barras...",
+    "status_ai_visual_searching": "Ahora intento reconocer el producto...",
+    "method_ai_ocr": "Gemini OCR",
+    "method_ai_vision": "Gemini Vision",
    "ai_fallback_searching": "Identificación de IA en curso...",
    "ai_fallback_found": "Producto identificado por IA",
    "ai_fallback_not_found": "IA: producto no reconocido",
-    "ai_fallback_exhausted": "IA: producto no reconocido — prueba a escanear el código"
+    "ai_fallback_exhausted": "IA: producto no reconocido — prueba a escanear el código",
+    "ai_overlay_msg": "Gemini Vision está analizando el producto...",
+    "ai_retry_btn": "Reintentar con IA",
+    "ai_match_title": "Producto reconocido por IA",
+    "ai_match_subtitle": "Elige un producto ya en despensa o agrega el detectado.",
+    "ai_match_existing": "Posibles coincidencias en despensa",
+    "ai_match_none": "No se encontraron productos similares en despensa.",
+    "ai_match_use_btn": "Usar este",
+    "ai_match_add_btn": "Agregar \"{name}\"",
+    "ai_detected_label": "IA detecto"
  },
  "action": {
    "title": "¿Qué quieres hacer?",
@@ -1020,6 +1039,7 @@
    "ai_quota": "Cuota de IA agotada. Inténtalo de nuevo en unos minutos.",
    "barcode_empty": "Introduce un código de barras",
    "barcode_format": "El código de barras solo puede contener números (4-14 dígitos)",
+    "barcode_checksum": "Suma de comprobación EAN inválida — verifica los dígitos del código",
    "min_chars": "Escribe al menos 2 caracteres",
    "not_in_inventory": "Producto no en inventario",
    "appliance_exists": "El electrodoméstico ya existe",
@@ -149,6 +149,12 @@
    "banner_anomaly_untracked_detail": "Vous avez <strong>{inv_qty} {unit}</strong> en inventaire, mais les sorties enregistrées dépassent les entrées — le stock initial n'a probablement jamais été ajouté comme transaction « entrée ». Vous pouvez corriger la quantité ou saisir les entrées manquantes.",
    "banner_anomaly_ghost_title": "vous avez moins de stock que prévu",
    "banner_anomaly_ghost_detail": "D'après les opérations enregistrées vous devriez avoir {expected_qty} {unit} de {name}, mais l'inventaire n'en montre que {inv_qty} {unit}. Avez-vous pris du stock sans l'enregistrer ?",
+    "banner_dup_loss_title": "Vérification double sortie : {name}",
+    "banner_dup_loss_detail": "Doublon possible dans {location} : deux sorties rapprochées ({qty_pair}) en ~{seconds}s. Vérifiez et corrigez si besoin.",
+    "banner_dup_loss_action_fix": "Corriger la quantité",
+    "banner_dup_loss_action_open": "Ouvrir la fiche produit",
+    "banner_dup_loss_action_done": "Déjà vérifié",
+    "banner_dup_loss_toast_done": "Contrôle marqué comme vérifié",
    "consumed": "Consommé : {n} ({pct}%)",
    "wasted": "Gaspillé : {n} ({pct}%)",
    "more_opened": "et {n} autres ouverts...",
@@ -218,10 +224,23 @@
    "status_invalid": "Invalide : {code} — nouvel essai",
    "status_confirmed": "Confirmé !",
    "status_parallel": "Scan combiné actif...",
+    "status_ocr_searching": "Je lis les chiffres du code-barres...",
+    "status_ai_visual_searching": "J'essaie maintenant de reconnaître le produit...",
+    "method_ai_ocr": "Gemini OCR",
+    "method_ai_vision": "Gemini Vision",
    "ai_fallback_searching": "Identification IA en cours...",
    "ai_fallback_found": "Produit identifié par l'IA",
    "ai_fallback_not_found": "IA : produit non reconnu",
-    "ai_fallback_exhausted": "IA : produit non reconnu — réessayez avec le code-barres"
+    "ai_fallback_exhausted": "IA : produit non reconnu — réessayez avec le code-barres",
+    "ai_overlay_msg": "Gemini Vision analyse le produit...",
+    "ai_retry_btn": "Reessayer avec l'IA",
+    "ai_match_title": "Produit reconnu par l'IA",
+    "ai_match_subtitle": "Choisissez un produit deja en stock ou ajoutez celui detecte.",
+    "ai_match_existing": "Correspondances possibles dans le stock",
+    "ai_match_none": "Aucun produit similaire trouve dans le stock.",
+    "ai_match_use_btn": "Utiliser celui-ci",
+    "ai_match_add_btn": "Ajouter \"{name}\"",
+    "ai_detected_label": "IA a detecte"
  },
  "action": {
    "title": "Que voulez-vous faire ?",
@@ -1020,6 +1039,7 @@
    "ai_quota": "Quota IA épuisé. Réessayez dans quelques minutes.",
    "barcode_empty": "Entrez un code-barres",
    "barcode_format": "Le code-barres ne doit contenir que des chiffres (4-14 chiffres)",
+    "barcode_checksum": "Somme de contrôle EAN invalide — vérifiez les chiffres du code-barres",
    "min_chars": "Tapez au moins 2 caractères",
    "not_in_inventory": "Produit absent de l'inventaire",
    "appliance_exists": "L'appareil existe déjà",
@@ -151,6 +151,12 @@
    "banner_anomaly_untracked_detail": "Hai <strong>{inv_qty} {unit}</strong> in inventario, ma le uscite registrate superano le entrate — le scorte iniziali probabilmente non sono mai state aggiunte come entrata. Puoi correggere la quantità o registrare le entrate mancanti.",
    "banner_anomaly_ghost_title": "hai meno scorte del previsto",
    "banner_anomaly_ghost_detail": "In base alle operazioni registrate dovresti avere {expected_qty} {unit} di {name}, ma l'inventario mostra solo {inv_qty} {unit}. Hai prelevato senza registrarlo?",
+    "banner_dup_loss_title": "Controllo doppio scarico: {name}",
+    "banner_dup_loss_detail": "Possibile doppia registrazione in {location}: due uscite ravvicinate ({qty_pair}) in ~{seconds}s. Verifica se va corretta.",
+    "banner_dup_loss_action_fix": "Correggi quantità",
+    "banner_dup_loss_action_open": "Apri scheda prodotto",
+    "banner_dup_loss_action_done": "Già verificato",
+    "banner_dup_loss_toast_done": "Controllo segnato come verificato",
    "consumed": "Consumati: {n} ({pct}%)",
    "wasted": "Buttati: {n} ({pct}%)",
    "more_opened": "e altri {n} prodotti aperti...",
@@ -221,10 +227,23 @@
    "status_invalid": "Non valido: {code} — riprovo",
    "status_confirmed": "Confermato!",
    "status_parallel": "Doppia scansione attiva...",
+    "status_ocr_searching": "Sto leggendo i numeri del codice a barre...",
+    "status_ai_visual_searching": "Ora provo a riconoscere il prodotto...",
+    "method_ai_ocr": "Gemini OCR",
+    "method_ai_vision": "Gemini Vision",
    "ai_fallback_searching": "Identificazione AI in corso...",
    "ai_fallback_found": "Prodotto identificato dall'AI",
    "ai_fallback_not_found": "AI: prodotto non riconosciuto",
-    "ai_fallback_exhausted": "AI: prodotto non riconosciuto — riprova con il barcode"
+    "ai_fallback_exhausted": "AI: prodotto non riconosciuto — riprova con il barcode",
+    "ai_overlay_msg": "Gemini Vision sta analizzando il prodotto...",
+    "ai_retry_btn": "Riprova con AI",
+    "ai_match_title": "Prodotto riconosciuto con AI",
+    "ai_match_subtitle": "Scegli se usare un prodotto gia presente oppure aggiungere quello rilevato.",
+    "ai_match_existing": "Possibili corrispondenze in dispensa",
+    "ai_match_none": "Nessun prodotto simile trovato in dispensa.",
+    "ai_match_use_btn": "Usa questo",
+    "ai_match_add_btn": "Aggiungi \"{name}\"",
+    "ai_detected_label": "AI ha trovato"
  },
  "action": {
    "title": "Cosa vuoi fare?",
@@ -1069,6 +1088,7 @@
    "ai_quota": "Quota AI esaurita. Riprova tra qualche minuto.",
    "barcode_empty": "Inserisci un codice a barre",
    "barcode_format": "Il codice a barre deve contenere solo numeri (4-14 cifre)",
+    "barcode_checksum": "Checksum EAN non valido — verifica le cifre del codice",
    "min_chars": "Scrivi almeno 2 caratteri",
    "not_in_inventory": "Prodotto non nell'inventario",
    "appliance_exists": "Elettrodomestico già presente",