fix: add HTTPS requirement check for camera access

- Check for secure context before attempting camera access
- Show clear user feedback when HTTPS is required
- Prevent confusing permission errors on insecure connections

src/views/ContactQRScanShowView.vue

@@ -214,6 +214,19 @@ export default class ContactQRScanShow extends Vue {
 
       const scanner = QRScannerFactory.getInstance();
 
+      // Check if scanning is supported first
+      if (!(await scanner.isSupported())) {
+        this.error = "Camera access requires HTTPS. Please use a secure connection.";
+        this.isScanning = false;
+        this.$notify({
+          group: "alert",
+          type: "warning",
+          title: "HTTPS Required",
+          text: "Camera access requires a secure (HTTPS) connection"
+        }, 5000);
+        return;
+      }
+
       // Check permissions first
       if (!(await scanner.checkPermissions())) {
         const granted = await scanner.requestPermissions();