added new validation to scanner

src/components/BarcodeScanner.tsx

@@ -9,6 +9,10 @@ interface BarcodeScannerProps {
   onScan: (code: string) => void;
 }
 
+function isValidCode(code: string) {
+  return /^[0-9E]+$/.test(code);
+}
+
 export default function BarcodeScanner({ onScan }: BarcodeScannerProps) {
   const videoRef = useRef<HTMLVideoElement>(null);
   const lastScan = useRef<string | null>(null);
@@ -28,7 +32,7 @@ export default function BarcodeScanner({ onScan }: BarcodeScannerProps) {
 
       try {
         stream = await navigator.mediaDevices.getUserMedia({
-          video: { facingMode: { ideal: "environment" } }, // 👈 fuerza cámara trasera
+          video: { facingMode: { ideal: "environment" } },
         });
 
         if (!videoRef.current) return;
@@ -64,6 +68,13 @@ export default function BarcodeScanner({ onScan }: BarcodeScannerProps) {
               if (raw && raw !== lastScan.current) {
                 lastScan.current = raw;
                 const processed = raw.startsWith("0") ? raw.slice(1) : raw;
+
+                if (!isValidCode(processed)) {
+                  toast.error("Intente de nuevo.");
+                  lastScan.current = null;
+                  return;
+                }
+
                 onScan(processed);
               }
             }
@@ -116,7 +127,15 @@ export default function BarcodeScanner({ onScan }: BarcodeScannerProps) {
               const code = result.getText().trim();
               if (code && code !== lastScan.current) {
                 lastScan.current = code;
+
                 const processed = code.startsWith("0") ? code.slice(1) : code;
+
+                if (!isValidCode(processed)) {
+                  toast.error("Intente de nuevo");
+                  lastScan.current = null;
+                  return;
+                }
+
                 onScan(processed);
               }
             } else if (err && !(err instanceof NotFoundException)) {
@@ -163,4 +182,4 @@ export default function BarcodeScanner({ onScan }: BarcodeScannerProps) {
   );
 }
 //Chatgpt
-//Gemini
+//Gemini