fix(desktop): ensure sidecar process stops on app shutdown

apps/desktop/src/main/index.ts

@@ -44,6 +44,21 @@ const waitForServer = async (
   return false
 }
 
+const stopServerProcess = () => {
+  if (!serverProcess) {
+    return
+  }
+
+  const runningServer = serverProcess
+  serverProcess = null
+
+  if (!runningServer.pid || runningServer.exitCode !== null) {
+    return
+  }
+
+  runningServer.kill()
+}
+
 const spawnServer = (port: number): string => {
   const binaryName = process.platform === 'win32' ? 'server.exe' : 'server'
   const binaryPath = join(process.resourcesPath, binaryName)
@@ -69,6 +84,10 @@ const spawnServer = (port: number): string => {
     console.error('Failed to start server:', err)
   })
 
+  serverProcess.on('exit', () => {
+    serverProcess = null
+  })
+
   return `http://127.0.0.1:${port}`
 }
 
@@ -96,6 +115,10 @@ const createWindow = async () => {
     return { action: 'deny' }
   })
 
+  mainWindow.on('closed', () => {
+    mainWindow = null
+  })
+
   if (process.env.ELECTRON_RENDERER_URL) {
     mainWindow.loadURL(process.env.ELECTRON_RENDERER_URL)
   } else {
@@ -118,6 +141,9 @@ const createWindow = async () => {
   }
 
   console.log(`Loading ${serverUrl}`)
+  if (!mainWindow || mainWindow.isDestroyed()) {
+    return
+  }
   mainWindow.loadURL(serverUrl)
 }
 
@@ -125,6 +151,7 @@ app.whenReady().then(createWindow)
 
 app.on('window-all-closed', () => {
   if (process.platform !== 'darwin') {
+    stopServerProcess()
     app.quit()
   }
 })
@@ -136,8 +163,5 @@ app.on('activate', () => {
 })
 
 app.on('before-quit', () => {
-  if (serverProcess) {
-    serverProcess.kill()
-    serverProcess = null
-  }
+  stopServerProcess()
 })