feat(FN-4939): complete Step 5 — add changeset and native helper re-export

Fusion-Task-Id: FN-4939
Fusion-Task-Lineage: b2a00edb-5245-4223-97e4-0a16dd2c3289

.changeset/fn-4939-desktop-window-visibility.md

@@ -0,0 +1,5 @@
+---
+"@runfusion/fusion": patch
+---
+
+Fix desktop app launches on macOS where the process starts but no visible window appears. Window position restore now validates saved coordinates against connected display work areas and drops off-screen positions, and startup explicitly show/focuses the window with a ready-to-show path plus fallback timer.

packages/desktop/src/index.ts

@@ -4,6 +4,14 @@ export { registerIpcHandlers } from "./ipc.js";
 
 export * from "./tray.js";
 export * from "./menu.js";
+export {
+  DEFAULT_WINDOW_STATE,
+  loadWindowState,
+  saveWindowState,
+  loadDesktopLaunchMode,
+  saveDesktopLaunchMode,
+  clampWindowStateToVisibleDisplay,
+} from "./native.js";
 export * from "./native.js";
 export * from "./deep-link.js";