Addressing comments

webapp/src/checkEnv.ts

@@ -1,5 +1,7 @@
-// Checks if all required environment variables are defined
-// Returns an array of missing variables
+/**
+ * Checks if all required environment variables are defined
+ * @returns {string[]} An array of missing environment variables
+ */
 export const getMissingEnvVariables = () => {
     // Should be aligned with variables defined in .env.example
     const envVariables = ['REACT_APP_BACKEND_URI', 'REACT_APP_AAD_AUTHORITY', 'REACT_APP_AAD_CLIENT_ID'];

webapp/src/components/token-usage/TokenUsageGraph.tsx

@@ -63,7 +63,8 @@ const contrastColors = [
 export const TokenUsageGraph: React.FC<ITokenUsageGraph> = ({ promptView, tokenUsage }) => {
     const classes = useClasses();
     const { conversations, selectedId } = useAppSelector((state: RootState) => state.conversations);
-    const loadingResponse = conversations[selectedId].botResponseStatus && Object.entries(tokenUsage).length === 0;
+    const loadingResponse =
+        selectedId !== '' && conversations[selectedId].botResponseStatus && Object.entries(tokenUsage).length === 0;
 
     const responseGenerationView: TokenUsageView = {};
     const memoryGenerationView: TokenUsageView = {};

webapp/src/components/views/BackendProbe.tsx

@@ -20,7 +20,7 @@ const BackendProbe: FC<IData> = ({ uri, onBackendFound }) => {
                 }
             };
 
-            void fetchAsync().catch(() => {
+            fetchAsync().catch(() => {
                 // Ignore - this page is just a probe, so we don't need to show any errors if backend is not found
             });
         }, 3000);