fix: TypeScript errors in new components

- Fix potential undefined access in QueryBuilderTab
- Fix unused variable in featureConfig test
- Add proper undefined checks for array access

Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>

src/components/admin/QueryBuilderTab.tsx

@@ -108,7 +108,9 @@ export default function QueryBuilderTab({
     value: string,
   ) => {
     const updated = [...whereConditions];
-    updated[index][field] = value;
+    if (updated[index]) {
+      updated[index][field] = value;
+    }
     setWhereConditions(updated);
   };
 

src/utils/featureConfig.test.ts

@@ -90,8 +90,8 @@ describe('FeatureConfig', () => {
     it('should return undefined for disabled feature', () => {
       // This test assumes there might be disabled features in the config
       const features = getFeatures();
-      const enabledIds = features.map(f => f.id);
-      
+      const _enabledIds = features.map(f => f.id);
+
       // Try to get a feature that doesn't exist in enabled list
       const disabledFeature = getFeatureById('disabled-test-feature');
       expect(disabledFeature).toBeUndefined();