Use normal shutdown infrastructure to hang up active calls

app/main.ts

@@ -2000,10 +2000,6 @@ app.on('before-quit', () => {
 
   systemTrayService?.markShouldQuit();
   windowState.markShouldQuit();
-
-  if (mainWindow) {
-    mainWindow.webContents.send('quit');
-  }
 });
 
 // Quit when all windows are closed.

ts/background.ts

@@ -723,6 +723,11 @@ export async function startApp(): Promise<void> {
 
         flushMessageCounter();
 
+        // Hangup active calls
+        window.Signal.Services.calling.hangupAllCalls(
+          'background/shutdown: shutdown requested'
+        );
+
         // Stop background processing
         void AttachmentDownloads.stop();
         idleDetector.stop();

ts/services/calling.ts

@@ -359,12 +359,6 @@ export class CallingClass {
       reduxInterface.setPresenting();
     });
 
-    ipcRenderer.on('quit', () => {
-      for (const conversationId of Object.keys(this.callsByConversation)) {
-        this.hangup(conversationId, 'ipcRenderer quit');
-      }
-    });
-
     void this.cleanExpiredGroupCallRingsAndLoop();
   }
 
@@ -1166,6 +1160,12 @@ export class CallingClass {
     log.info('hangup: Done.');
   }
 
+  hangupAllCalls(reason: string): void {
+    for (const conversationId of Object.keys(this.callsByConversation)) {
+      this.hangup(conversationId, reason);
+    }
+  }
+
   setOutgoingAudio(conversationId: string, enabled: boolean): void {
     const call = getOwn(this.callsByConversation, conversationId);
     if (!call) {