fix stale state in /rewind

packages/cli/src/ui/hooks/slashCommandProcessor.test.tsx

@@ -577,7 +577,7 @@ describe('useSlashCommandProcessor', () => {
 
     it('should handle "load_history" action', async () => {
       const mockClient = {
-        setHistory: vi.fn(),
+        resumeChat: vi.fn().mockResolvedValue(undefined),
         stripThoughtsFromHistory: vi.fn(),
       } as unknown as GeminiClient;
       vi.spyOn(mockConfig, 'getGeminiClient').mockReturnValue(mockClient);

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

@@ -549,7 +549,9 @@ export const useSlashCommandProcessor = (
                     }
                   }
                 case 'load_history': {
-                  config?.getGeminiClient()?.setHistory(result.clientHistory);
+                  await config
+                    ?.getGeminiClient()
+                    ?.resumeChat(result.clientHistory);
                   fullCommandContext.ui.clear();
                   result.history.forEach((item, index) => {
                     fullCommandContext.ui.addItem(item, index);