[fix](client): scan QR codes with MLKit's barcode output, not the iOS-only object output

Tapping "Scan a QR code" crashed the app on Android:

    com.facebook.react.common.JavascriptException: Error:
    CameraFactory.createObjectOutput(...): java.lang.Error:
    CameraObjectOutput is not available on Android!

`useObjectOutput` is Apple Vision only — the comment claiming v5 ships a
cross-platform code scanner in core was wrong, and the native factory throws as
soon as the screen mounts. The Barcode Scanner output is the cross-platform one
(MLKit on Android, Vision on iOS); it is attached to the same `<Camera>` via
`outputs`, scans `qr-code` only, and keeps the hand-paste fallback. The scan
callback now takes the barcode values directly instead of the object-output
shape.

bun.lock

@@ -26,6 +26,7 @@
         "react-native-screens": "4.25.2",
         "react-native-svg": "15.15.5",
         "react-native-vision-camera": "5.2.3",
+        "react-native-vision-camera-barcode-scanner": "^5.2.3",
         "react-native-worklets": "0.10.0",
         "tailwind-merge": "^3.6.0",
         "tailwind-variants": "^3.3.1",
@@ -1442,6 +1443,8 @@
 
     "react-native-vision-camera": ["[email protected]", "", { "peerDependencies": { "react": "*", "react-native": "*", "react-native-nitro-image": "*", "react-native-nitro-modules": "*" }, "optionalPeers": ["react-native-nitro-modules"] }, "sha512-OHjgM8BPzxppTqbF1FEltj+fxvisj4xdghM7ypoT1p6cOe28HByhOJP1c7LkBiUiZuotbsdbQwGdJ8nU7ZvPzA=="],
 
+    "react-native-vision-camera-barcode-scanner": ["[email protected]", "", { "peerDependencies": { "react": "*", "react-native": "*", "react-native-nitro-image": "*", "react-native-nitro-modules": "*", "react-native-vision-camera": "*" }, "optionalPeers": ["react-native-nitro-modules"] }, "sha512-p8SyswRlr9Ty5gFcQ1qM8gmU8hKbHyRLyu9TKFMD7oUXsZDF93NKGvcr4Qdr16Z+AIj3HYA/fW1NgoeY+L353g=="],
+
     "react-native-worklets": ["[email protected]", "", { "dependencies": { "@babel/plugin-transform-arrow-functions": "^7.27.1", "@babel/plugin-transform-class-properties": "^7.28.6", "@babel/plugin-transform-classes": "^7.28.6", "@babel/plugin-transform-nullish-coalescing-operator": "^7.28.6", "@babel/plugin-transform-optional-chaining": "^7.28.6", "@babel/plugin-transform-shorthand-properties": "^7.27.1", "@babel/plugin-transform-template-literals": "^7.27.1", "@babel/plugin-transform-unicode-regex": "^7.27.1", "@babel/preset-typescript": "^7.28.5", "@babel/types": "^7.27.1", "convert-source-map": "^2.0.0", "semver": "^7.7.4" }, "peerDependencies": { "@babel/core": "*", "@react-native/metro-config": "*", "react": "*", "react-native": "0.83 - 0.86" } }, "sha512-JhE6IxDf6iabC0qu3+TAKA4v9RlluXmoIngPQX7/QUByf75lfrsHZ6/dQhyjEWnp1EEQiwzz8Cpew140ZcewDw=="],
 
     "react-refresh": ["[email protected]", "", {}, "sha512-jCvmsr+1IUSMUyzOkRcvnVbX3ZYC6g9TDrDbFuFmRDq7PD4yaGbLKNQL6k2jnArV8hjYxh7hVhAZB6s9HDGpZA=="],