🛡️ Sentinel: [HIGH] Fix JavaScript Injection in ShiftScreen WebView

[TargetMisser]

🚨 Severity: HIGH
💡 Vulnerability: Unsafe string interpolation and manual quote replacement was used to pass user-controlled JSON data into a WebView via injectJavaScript (window.runTesseract('${base64Json}')).
🎯 Impact: If base64Json contained an unescaped single quote or malicious executable character, it could break out of the string literal context and lead to unauthorized execution of JavaScript within the WebView's context (XSS / JS Injection).
🔧 Fix: Replaced manual escaping (replace(/'/g, "\\'")) and string template literal injection with proper JSON.stringify() evaluation inside the template string to guarantee that the payload safely interpolates as a string literal.
✅ Verification: Verified that changes compile correctly (npm run typecheck) and the application test suite executes without failures. Reviewed and confirmed the logic accurately passes JSON representations safely as intended. Created .jules/sentinel.md entry.

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PR created automatically by Jules for task 12134014644047521669 started by @TargetMisser

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Project	Deployment	Actions	Updated (UTC)
flight-work-app	Ready	Preview, Comment, Open in v0	Apr 7, 2026 1:10am

[Copilot]

Pull request overview

This PR addresses a high-severity JavaScript injection risk in the app’s ShiftScreen WebView OCR bridge by changing how image payload data is passed into injectJavaScript, and records the security learning in the Jules sentinel log.

Changes:

• Replaces unsafe string interpolation (and manual quote escaping) with JSON.stringify(...)-based string literal injection when calling window.runTesseract(...) from React Native.
• Updates package-lock.json dependency resolutions (including react-native-webview, @react-native-picker/picker, pdfjs-dist) and adds expo-secure-store to the lockfile.
• Adds a .jules/sentinel.md entry documenting the vulnerability pattern and recommended prevention.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
src/screens/ShiftScreen.tsx	Hardens WebView injectJavaScript payload passing to prevent JS injection during OCR invocation.
package-lock.json	Updates resolved dependency versions / metadata and introduces expo-secure-store in the lockfile.
.jules/sentinel.md	Documents the injection pattern and mitigation guidance for future reference.

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