Add import template into tui. Fix tests that fail on macos. Fix some updates.

src/utils/pick-template-export.ts

@@ -0,0 +1,64 @@
+/**
+ * Helpers for finding an {@link XOTemplate} export in a loaded ES module.
+ */
+
+/**
+ * Returns true when `value` looks like an XOTemplate object (pre-schema check).
+ * Used only to pick the correct export before {@link parseTemplate} validates fully.
+ */
+export function isTemplateLike(value: unknown): value is Record<string, unknown> {
+  if (value === null || typeof value !== "object" || Array.isArray(value)) {
+    return false;
+  }
+
+  const candidate = value as Record<string, unknown>;
+  return (
+    typeof candidate.$schema === "string" &&
+    typeof candidate.name === "string" &&
+    typeof candidate.roles === "object" &&
+    candidate.roles !== null
+  );
+}
+
+/**
+ * Picks the single XOTemplate export from a dynamically loaded module.
+ *
+ * Resolution order:
+ * 1. `default` export, when template-like
+ * 2. Exactly one named template-like export
+ *
+ * @throws When no template export exists or multiple template exports are found.
+ */
+export function pickTemplateExport(
+  moduleExports: Record<string, unknown>,
+): Record<string, unknown> {
+  const defaultExport = moduleExports.default;
+  if (isTemplateLike(defaultExport)) {
+    return defaultExport;
+  }
+
+  const namedTemplateExports = Object.entries(moduleExports).filter(
+    ([exportName, exportValue]) =>
+      exportName !== "default" && isTemplateLike(exportValue),
+  );
+
+  if (namedTemplateExports.length === 1) {
+    const [, exportValue] = namedTemplateExports[0]!;
+    if (!isTemplateLike(exportValue)) {
+      throw new Error("No XOTemplate export found.");
+    }
+    return exportValue;
+  }
+
+  if (namedTemplateExports.length > 1) {
+    const exportNames = namedTemplateExports.map(([name]) => name).join(", ");
+    throw new Error(
+      `Multiple template exports found (${exportNames}). ` +
+        "Use a single named export or a default export.",
+    );
+  }
+
+  throw new Error(
+    "No XOTemplate export found. Export a template object as `default` or a named export.",
+  );
+}