refactor(react-sdk): simplify feature config retrieval

Update useFeature hook to return a reduced feature configuration with only key and payload properties, aligning with recent configuration changes in the SDK.

Author: pavkam

packages/react-sdk/src/index.tsx

@@ -247,6 +247,10 @@ export function useFeature<TKey extends FeatureKey>(key: TKey): Feature<TKey> {
       });
   }
 
+  const reducedConfig = feature?.config
+    ? { key: feature.config.key, payload: feature.config.payload }
+    : ({} as EmptyFeatureConfig);
+
   return {
     isLoading,
     track,
@@ -257,7 +261,7 @@ export function useFeature<TKey extends FeatureKey>(key: TKey): Feature<TKey> {
     },
     get config() {
       sendCheckEvent();
-      return feature?.config ?? ({} as EmptyFeatureConfig);
+      return reducedConfig;
     },
   };
 }

packages/react-sdk/test/usage.test.tsx

@@ -263,8 +263,7 @@ describe("useFeature", () => {
         isLoading: false,
         config: {
           key: "gpt3",
-          targetingVersion: 2,
-          value: { model: "gpt-something", temperature: 0.5 },
+          payload: { model: "gpt-something", temperature: 0.5 },
         },
         track: expect.any(Function),
         requestFeedback: expect.any(Function),