Fix iOS scene lifecycle startup

apps/mobile/app.json

@@ -11,6 +11,7 @@
     "android": { "package": "app.openmuse.mobile" },
     "web": { "bundler": "metro", "name": "OpenMuse — a little room for everything" },
     "plugins": [
+      "./plugins/withIOSSceneLifecycle",
       "expo-document-picker",
       "@config-plugins/react-native-blob-util",
       "@config-plugins/react-native-pdf"

apps/mobile/plugins/withIOSSceneLifecycle.js

@@ -0,0 +1,62 @@
+const fs = require("node:fs");
+const path = require("node:path");
+const { withDangerousMod, withInfoPlist, withXcodeProject } = require("expo/config-plugins");
+
+const sceneDelegate = `import UIKit
+
+final class SceneDelegate: UIResponder, UIWindowSceneDelegate {
+  var window: UIWindow?
+
+  func scene(
+    _ scene: UIScene,
+    willConnectTo session: UISceneSession,
+    options connectionOptions: UIScene.ConnectionOptions
+  ) {
+    guard let windowScene = scene as? UIWindowScene else { return }
+    guard let appWindow = (UIApplication.shared.delegate as? AppDelegate)?.window else { return }
+    appWindow.windowScene = windowScene
+    window = appWindow
+    appWindow.makeKeyAndVisible()
+  }
+}
+`;
+
+function withIOSSceneLifecycle(config) {
+  config = withInfoPlist(config, (mod) => {
+    mod.modResults.UIApplicationSceneManifest = {
+      UIApplicationSupportsMultipleScenes: false,
+      UISceneConfigurations: {
+        UIWindowSceneSessionRoleApplication: [
+          {
+            UISceneConfigurationName: "Default Configuration",
+            UISceneDelegateClassName: "$(PRODUCT_MODULE_NAME).SceneDelegate",
+          },
+        ],
+      },
+    };
+    return mod;
+  });
+
+  config = withDangerousMod(config, [
+    "ios",
+    async (mod) => {
+      const filePath = path.join(
+        mod.modRequest.platformProjectRoot,
+        mod.modRequest.projectName,
+        "SceneDelegate.swift",
+      );
+      fs.writeFileSync(filePath, sceneDelegate);
+      return mod;
+    },
+  ]);
+
+  return withXcodeProject(config, (mod) => {
+    const project = mod.modResults;
+    const target = project.getFirstTarget();
+    if (!project.hasFile("OpenMuse/SceneDelegate.swift"))
+      project.addSourceFile("OpenMuse/SceneDelegate.swift", { target: target.uuid }, "OpenMuse");
+    return mod;
+  });
+}
+
+module.exports = withIOSSceneLifecycle;