🧹 Use unknown instead of any in BottomPanel REPL catch clause

[beingniloy]

🎯 What

We addressed a code health and type safety issue in src/components/BottomPanel.tsx:122 by replacing the any type annotations in the catch clause with unknown.

💡 Why

Using any disables TypeScript's compiler safety checks, which can lead to runtime errors if an unexpected object or type is caught. By changing the type to unknown and implementing an instanceof Error guard check, we ensure that:

1. err.message is only accessed if the error is actually an instance of Error.
2. Any non-standard caught values are safely handled by falling back to converting the error object to a string via String(err).
   This significantly improves type safety, code correctness, and maintainability.

✅ Verification

We verified the change by:

1. Running pnpm lint to ensure that TypeScript's type-checker compiles the codebase successfully with zero type errors.
2. Running pnpm build to verify the Vite production build succeeds without any errors.

✨ Result

Better type-safety, maintainability, and code health in the debug REPL execution flow within BottomPanel.tsx.

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PR created automatically by Jules for task 17675274763660402059 started by @beingniloy

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