feat: fix CompactSeedQR binary QR code scanning with jsQR library

- Replace BarcodeDetector with jsQR for raw binary byte access
- BarcodeDetector forced UTF-8 decoding which corrupted binary data
- jsQR's binaryData property preserves raw bytes without text conversion
- Fix regex bug: use single backslash \x00 instead of \x00 for binary detection
- Add debug logging for scan data inspection
- QR generation already worked (Krux-compatible), only scanning was broken

Resolves binary QR code scanning for 12/24-word CompactSeedQR format.
Tested with Krux device - full bidirectional compatibility confirmed.

package.json

@@ -12,6 +12,7 @@
   "dependencies": {
     "@types/pako": "^2.0.4",
     "html5-qrcode": "^2.3.8",
+    "jsqr": "^1.4.0",
     "lucide-react": "^0.462.0",
     "openpgp": "^6.3.0",
     "pako": "^2.1.0",
@@ -23,6 +24,7 @@
     "@types/bun": "^1.3.6",
     "@types/node": "^22.10.2",
     "@types/qrcode": "^1.5.5",
+    "@types/qrcode-generator": "^1.0.6",
     "@types/react": "^18.3.12",
     "@types/react-dom": "^18.3.1",
     "@vitejs/plugin-react": "^4.3.4",