🔒 Fix unhandled exception in Redux DevTools JSON parsing

[johnstrand]

🎯 What: The application could crash due to an unhandled exception if JSON.parse encounters invalid JSON from a Redux DevTools message.
⚠️ Risk: If the Redux dev tools extension or an attacker manipulated the messages, it could crash the application for developers relying on dev tools for debugging.
🛡️ Solution: Added a try...catch block around the JSON parsing logic inside the Redux dev tools message subscriber. If the message payload is invalid, the error is caught and gracefully ignored, leaving the state untouched. This prevents an uncaught exception from propagating.

New tests were also added in src/__tests__/Squawk.reduxDevTools.test.ts to assert that valid JSON correctly updates the store state, and that invalid JSON is safely ignored without throwing.

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PR created automatically by Jules for task 12901159229705250362 started by @johnstrand

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