🛡️ Sentinel: [HIGH] Fix XSS in WebView communication

[TargetMisser]

🚨 Severity: HIGH
💡 Vulnerability: Passing data to a WebView via injectJavaScript with string interpolation (e.g. window.runTesseract(${JSON.stringify(base64Json)});) acts like eval(). If escaping fails, this exposes the application to Cross-Site Scripting (XSS) / script injection attacks.
🎯 Impact: An attacker who manages to manipulate the input could execute arbitrary JavaScript within the context of the WebView.
🔧 Fix: Removed injectJavaScript calls and replaced them with webViewRef.current.postMessage(). Added message event listeners to the WebView's HTML template (engineHtml) to receive the data securely.
✅ Verification: Ran npm run typecheck and verified functionality via testing.

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PR created automatically by Jules for task 13728451190204904363 started by @TargetMisser

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Project	Deployment	Actions	Updated (UTC)
flight-work-app	Ready	Preview, Comment, Open in v0	Apr 19, 2026 1:28am