handle edge cases

Author: rishsriv

src/components/EvalVisualizerSingle.jsx

@@ -188,7 +188,7 @@ const EvalVisualizerSingle = ({
       });
 
       const result = await response.json();
-      setGoldenQueryResult(result.result);
+      setGoldenQueryResult(result?.result);
       setResultsSource("postgresgolden");
       setErrorMessage(prev => ({ ...prev, golden: null }));
     } catch (error) {

src/components/ResultsTable.jsx

@@ -37,7 +37,7 @@ const ResultsTable = ({ results }) => {
           </tr>
         </thead>
         <tbody>
-          {results.map((row, rowIndex) => (
+          {results && results.map((row, rowIndex) => (
             <tr key={rowIndex}>
               {Object.values(row).map((value, colIndex) => (
                 <td