fix(desktop): remove titlebar inset in fullscreen (#38793)

packages/desktop/src/renderer/index.tsx

@@ -25,6 +25,7 @@ import { initI18n, t } from "./i18n"
 import { initializationData, initializationReady } from "./initialization"
 import { DesktopFirstLaunchOnboarding } from "./onboarding"
 import { resetZoom, setPinchZoomEnabled, webviewZoom, zoomIn, zoomOut } from "./webview-zoom"
+import { windowFullscreen } from "./window-fullscreen"
 import { availableStartupServer, readyWslConnections } from "./wsl/connections"
 import "./styles.css"
 import { Splash } from "@opencode-ai/ui/logo"
@@ -294,6 +295,8 @@ const createPlatform = (windowState: DesktopWindowState): Platform => {
 
     webviewZoom,
 
+    windowFullscreen,
+
     getPinchZoomEnabled: () => window.api.getPinchZoomEnabled(),
 
     setPinchZoomEnabled,

packages/desktop/src/renderer/window-fullscreen.ts

@@ -0,0 +1,8 @@
+import { createSignal } from "solid-js"
+
+const [windowFullscreen, setWindowFullscreen] = createSignal(false)
+
+window.api.onWindowFullscreenChanged(setWindowFullscreen)
+void window.api.getWindowFullscreen().then(setWindowFullscreen)
+
+export { windowFullscreen }