Align fullscreen return button with project actions

electron/main/ipc-handlers.ts

@@ -6,6 +6,7 @@ import { app, BrowserWindow, dialog, ipcMain, shell } from 'electron';
 import { registerHostApiProxyHandlers } from './ipc/host-api-proxy';
 import { registerTranscriptExportHandler } from './ipc/transcript-export';
 import { registerConversationLinkContextMenuHandler } from './ipc/conversation-link-context-menu';
+import { registerWindowFullscreenHandlers } from './ipc/window-fullscreen';
 import { applyProxySettings } from './proxy';
 import { syncLaunchAtStartupSettingFromStore } from './launch-at-startup';
 import { getAllSettings, getSetting, resetSettings, setSetting, type AppSettings } from '../utils/store';
@@ -254,6 +255,7 @@ export function registerIpcHandlers(
     if (!window || window.isDestroyed()) throw new Error('Main window is unavailable');
     return window;
   };
+  const bindWindowFullscreen = registerWindowFullscreenHandlers(requireRequestWindow);
   registerHostApiProxyHandlers(hostApiContext);
   registerTranscriptExportHandler(getMainWindow);
   registerConversationLinkContextMenuHandler(getMainWindow);
@@ -272,7 +274,10 @@ export function registerIpcHandlers(
     return leases;
   };
   const bindWindow = (window: BrowserWindow): void => {
-    if (!window.isDestroyed() && !window.webContents.isDestroyed()) bindRenderer(window.webContents);
+    if (!window.isDestroyed() && !window.webContents.isDestroyed()) {
+      bindRenderer(window.webContents);
+      bindWindowFullscreen(window);
+    }
   };
   const initialWindow = getMainWindow();
   if (initialWindow) bindWindow(initialWindow);

electron/main/ipc/window-fullscreen.ts

@@ -0,0 +1,20 @@
+import { ipcMain, type BrowserWindow } from 'electron';
+
+export function registerWindowFullscreenHandlers(
+  requireWindow: (event: Electron.IpcMainInvokeEvent) => BrowserWindow,
+): (window: BrowserWindow) => void {
+  ipcMain.handle('window:isFullScreen', (event) => requireWindow(event).isFullScreen());
+
+  const boundWindows = new WeakSet<BrowserWindow>();
+  return (window: BrowserWindow): void => {
+    if (window.isDestroyed() || window.webContents.isDestroyed() || boundWindows.has(window)) return;
+    boundWindows.add(window);
+
+    const notify = (fullscreen: boolean): void => {
+      if (window.isDestroyed() || window.webContents.isDestroyed()) return;
+      window.webContents.send('window:fullscreen-changed', fullscreen);
+    };
+    window.on('enter-full-screen', () => notify(true));
+    window.on('leave-full-screen', () => notify(false));
+  };
+}

electron/preload/index.ts

@@ -33,6 +33,7 @@ const validInvokeChannels = [
   'window:maximize',
   'window:close',
   'window:isMaximized',
+  'window:isFullScreen',
   'settings:get',
   'settings:set',
   'settings:setMany',
@@ -64,6 +65,7 @@ const validInvokeChannels = [
 ];
 
 const validEventChannels = [
+  'window:fullscreen-changed',
   'navigate',
   'cloud-agent-link',
   'update:status-changed',