Update service.test.ts

Author: charlesvien

apps/code/src/main/services/agent/service.test.ts

@@ -51,8 +51,13 @@ const mockFetch = vi.hoisted(() => vi.fn());
 
 // --- Module mocks ---
 
+const mockPowerMonitor = vi.hoisted(() => ({
+  on: vi.fn(),
+}));
+
 vi.mock("electron", () => ({
   app: mockApp,
+  powerMonitor: mockPowerMonitor,
 }));
 
 vi.mock("../../utils/logger.js", () => ({