debug: add zoom capability detection logging to Scanner.tsx

frontend/components/Scanner.tsx

@@ -77,9 +77,24 @@ export default function Scanner({ onScanSuccess, onOCRMatch, paused }: ScannerPr
         const video = document.querySelector(`#${scannerId} video`) as HTMLVideoElement;
         const track = (video?.srcObject as MediaStream)?.getVideoTracks()[0];
         const caps = track?.getCapabilities() as any;
+
+        // Debug logging
+        console.log('[Zoom Detection Debug]', {
+          videoFound: !!video,
+          trackFound: !!track,
+          trackState: track?.readyState,
+          capabilitiesExists: !!caps,
+          zoomCapability: caps?.zoom,
+          zoomMax: caps?.zoom?.max,
+          allCapabilities: Object.keys(caps || {}),
+        });
+
         if (track && caps?.zoom) {
           setHasZoom(true);
           setMaxZoom(caps.zoom.max || 3);
+          console.log('[Zoom Detection SUCCESS] - hasZoom set to true, maxZoom:', caps.zoom.max || 3);
+        } else {
+          console.log('[Zoom Detection FAILED] - Camera does not support zoom capability');
         }
 
         setIsStarted(true);