Fix comprehensive lint and type errors across codebase

- Replace explicit 'any' types with 'unknown' or specific types
- Fix Jest DOM test setup with proper type definitions
- Resolve NODE_ENV assignment errors using Object.defineProperty
- Fix React Hook dependency warnings with useCallback patterns
- Remove unused variables and add appropriate ESLint disables
- Update documentation with groups feature information
- Ensure all tests pass with proper TypeScript compliance

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/edit/[id]/page.tsx

@@ -86,7 +86,7 @@ export default function EditStream() {
     if (streamId) {
       fetchData();
     }
-  }, [streamId]);
+  }, [streamId, showError]);
 
   const handleInputChange = (e: React.ChangeEvent<HTMLInputElement>) => {
     const { name, value } = e.target;