Wire scanner feedback toasts and restore rescan uploads (#157)

lib/use-scanner-identification.js

@@ -63,6 +63,7 @@ function readFileToImageData(file) {
 
 export function useScannerIdentification({
   onCardScanned,
+  onScanImageUploaded,
   onError,
   onTrackerComplete,
   onTrackerReset,
@@ -102,15 +103,20 @@ export function useScannerIdentification({
     }, 3000);
 
     // Show result immediately — don't block on upload
-    onCardScanned(buildScannedCardPayload(finalCard, { imageData, scanImageUrl: null, ocrMeta }));
+    const queueCardId = onCardScanned(
+      buildScannedCardPayload(finalCard, { imageData, scanImageUrl: null, ocrMeta })
+    );
     finishTrackedCard(cardTracker);
 
     // Upload capture in background (fire-and-forget)
-    if (imageData) {
+    if (imageData && queueCardId) {
       uploadScanCapture(imageData)
         .then((url) => {
-          if (debugLog && isDebugMode) {
-            debugLog('📤', `Background upload complete: ${url ? 'success' : '429'}`);
+          if (url) {
+            onScanImageUploaded?.(queueCardId, url);
+          }
+          if (isDebugMode()) {
+            debugLog('📤', `Background upload complete: ${url ? 'success' : 'skipped'}`);
           }
         })
         .catch((uploadError) => {

lib/use-scanner-queue.js

@@ -176,6 +176,7 @@ export function useScannerQueue({ user, sessionDestination, scanDefaults, deckMo
       persistCart(nextQueue, next);
       return next;
     });
+    return cardEntry.id;
   };
 
   const incrementCardQuantity = (cardId) => {

pages/scanner.js

@@ -22,6 +22,8 @@ import { clearScannerCartStorage } from '../lib/scanner-session.js';
 import { VOCAB, collectionDisplayName } from '../lib/collection-vocabulary.js';
 
 const TOAST_DURATION_MS = 2500;
+const NOTICE_TOAST_DURATION_MS = 8000;
+const ERROR_TOAST_DURATION_MS = 5000;
 
 export default function Scanner() {
   const { user, loading: authLoading } = useAuth();
@@ -53,13 +55,24 @@ export default function Scanner() {
   const batchInputRef = useRef(null);
   const disambiguationActiveRef = useRef(false);
 
+  const showPageToast = useCallback((message, type = 'success', durationMs = TOAST_DURATION_MS) => {
+    clearTimeout(toastTimerRef.current);
+    setPageToast({ message, visible: true, type });
+    toastTimerRef.current = setTimeout(() => {
+      setPageToast((current) => ({ ...current, visible: false }));
+    }, durationMs);
+  }, []);
+
   const { scanDefaults } = useScannerSession();
   const queue = useScannerQueue({ user, scanDefaults, deckMode: null });
 
   const onVerifyCardRef = useRef(null);
 
   const camera = useCameraScanner({
-    onError: (msg) => console.error('Camera error:', msg),
+    onError: (msg) => {
+      console.error('Camera error:', msg);
+      showPageToast(msg, 'error', ERROR_TOAST_DURATION_MS);
+    },
     onVerifyCard: (cardTracker) => onVerifyCardRef.current?.(cardTracker),
     verificationPausedRef,
     autoDetectPausedRef,
@@ -67,7 +80,13 @@ export default function Scanner() {
 
   const identification = useScannerIdentification({
     onCardScanned: queue.handleCardScanned,
-    onError: (msg) => console.error('Identification error:', msg),
+    onScanImageUploaded: (cardId, url) => {
+      queue.updateCardMetadata(cardId, { scanImageUrl: url });
+    },
+    onError: (msg) => {
+      console.error('Identification error:', msg);
+      showPageToast(msg, 'error', ERROR_TOAST_DURATION_MS);
+    },
     onTrackerComplete: camera.removeTrackedCard,
     onTrackerReset: camera.resetTrackedCard,
     videoRef: camera.videoRef,
@@ -102,6 +121,11 @@ export default function Scanner() {
     disambiguationActiveRef.current = Boolean(identification.disambiguation);
   }, [identification.disambiguation]);
 
+  useEffect(() => {
+    if (!identification.scanNotice) return;
+    showPageToast(identification.scanNotice, 'info', NOTICE_TOAST_DURATION_MS);
+  }, [identification.scanNotice, showPageToast]);
+
   useEffect(() => {
     const mobileCheckoutPauses =
       typeof window !== 'undefined' &&
@@ -137,14 +161,6 @@ export default function Scanner() {
     return () => clearTimeout(toastTimerRef.current);
   }, []);
 
-  const showPageToast = useCallback((message, type = 'success') => {
-    clearTimeout(toastTimerRef.current);
-    setPageToast({ message, visible: true, type });
-    toastTimerRef.current = setTimeout(() => {
-      setPageToast((current) => ({ ...current, visible: false }));
-    }, TOAST_DURATION_MS);
-  }, []);
-
   const handleLeaveConfirm = () => {
     clearScannerCartStorage();
     queue.clearScannedCards();