Add ExtensionLoader interface, use that on Config object (#12116)

packages/cli/src/ui/hooks/useExtensionUpdates.ts

@@ -78,7 +78,6 @@ export const useConfirmUpdateRequests = () => {
 };
 
 export const useExtensionUpdates = (
-  extensions: GeminiCLIExtension[],
   extensionManager: ExtensionManager,
   addItem: UseHistoryManagerReturn['addItem'],
 ) => {
@@ -86,6 +85,7 @@ export const useExtensionUpdates = (
     extensionUpdatesReducer,
     initialExtensionUpdatesState,
   );
+  const extensions = extensionManager.getExtensions();
 
   useEffect(() => {
     const extensionsToCheck = extensions.filter((extension) => {