fix: createSingletonComposable

packages/core/src/utils/createSingletonComposable.ts

@@ -1,9 +1,17 @@
-/**
- * Creates a composable that should only be called once.
- *
- * @category utilities
- */
-export function createSingletonComposable<T>(fn: () => T): () => T {
-  let result: T | undefined
-  return () => result ??= fn()
-}
+import { effectScope } from '@reactive-vscode/reactivity'
+
+/**
+ * Creates a composable that should only be called once.
+ *
+ * @category utilities
+ */
+export function createSingletonComposable<T>(fn: () => T): () => T {
+  let result: T | undefined
+  return () => {
+    if (result !== undefined) {
+      return result
+    }
+    const scope = effectScope(true)
+    return result = scope.run(fn)!
+  }
+}