feat: Implement background shell commands (#14849)

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

@@ -68,6 +68,9 @@ const MockedGeminiClientClass = vi.hoisted(() =>
       recordToolCalls: vi.fn(),
       getConversationFile: vi.fn(),
     });
+    this.getCurrentSequenceModel = vi
+      .fn()
+      .mockReturnValue('gemini-2.0-flash-exp');
   }),
 );