Fix PR CI and guard resume relay during shutdown

Co-authored-by: Orca <help@stably.ai>

src/main/browser/cdp-ws-proxy.test.ts

@@ -647,10 +647,11 @@ describe('CdpWsProxy', () => {
   })
 
   it('does not register a PDF stream when the client disconnects mid-print', async () => {
-    let resolvePrint: (buf: Buffer) => void = () => {}
+    type PrintToPdfData = Awaited<ReturnType<typeof mock.webContents.printToPDF>>
+    let resolvePrint: (buf: PrintToPdfData) => void = () => {}
     mock.webContents.printToPDF.mockImplementationOnce(
       () =>
-        new Promise<Buffer>((resolve) => {
+        new Promise<PrintToPdfData>((resolve) => {
           resolvePrint = resolve
         })
     )

src/main/window/createMainWindow.test.ts

@@ -2822,6 +2822,7 @@ describe('createMainWindow', () => {
         invalidate: vi.fn(),
         setWindowOpenHandler: vi.fn(),
         send: vi.fn(),
+        isDestroyed: vi.fn(() => false),
         id: 1
       }
       const instance = {
@@ -2883,6 +2884,20 @@ describe('createMainWindow', () => {
       expect(webContents.invalidate).not.toHaveBeenCalled()
     })
 
+    it('does not send the resume event once webContents is destroyed', () => {
+      const { webContents } = setupResumeWindow()
+      createMainWindow(null)
+      const onResume = getPowerResumeListener()
+      webContents.isDestroyed.mockReturnValue(true)
+      webContents.send.mockClear()
+      webContents.invalidate.mockClear()
+
+      onResume()
+
+      expect(webContents.send).not.toHaveBeenCalled()
+      expect(webContents.invalidate).not.toHaveBeenCalled()
+    })
+
     it('removes the powerMonitor resume listener when the window closes', () => {
       const { windowHandlers } = setupResumeWindow()
       createMainWindow(null)

src/main/window/createMainWindow.ts

@@ -345,7 +345,7 @@ export function createMainWindow(
   // run. Relay powerMonitor resume explicitly (supported on mac/win/linux)
   // and force a repaint so stale compositor surfaces recover too.
   const onSystemResume = (): void => {
-    if (mainWindow.isDestroyed()) {
+    if (mainWindow.isDestroyed() || mainWindow.webContents.isDestroyed?.() === true) {
       return
     }
     forceRepaint(mainWindow)