fix: preserve "array of" indicator in UI for ArrayShape handling

Author: alexpmule

src/ApiTypeDocument.js

@@ -526,18 +526,11 @@ export class ApiTypeDocument extends PropertyDocumentMixin(LitElement) {
     if (Array.isArray(item)) {
       [item] = item;
     }
+    // For array types in unions, return the array itself instead of unwrapping to items
+    // This preserves the "array of" indicator in the UI
     if (this._hasType(item, this.ns.aml.vocabularies.shapes.ArrayShape)) {
       item = this._resolve(item);
-      const itemsKey = this._getAmfKey(this.ns.aml.vocabularies.shapes.items);
-      const items = this._ensureArray(item[itemsKey]);
-      if (items && items.length === 1) {
-        let result = items[0];
-        if (Array.isArray(result)) {
-          [result] = result;
-        }
-        result = this._resolve(result);
-        return result;
-      }
+      return item;
     }
     if (Array.isArray(item)) {
       [item] = item;

test/api-type-document.test.js

@@ -349,10 +349,11 @@ describe('<api-type-document>', () => {
           element.amf = amf;
           key = element._getAmfKey(element.ns.aml.vocabularies.shapes.anyOf);
           const result = element._computeProperty(type, key, 0);
+          // Should return ArrayShape to preserve "Array of" indicator in UI
           assert.isTrue(
             element._hasType(
               result,
-              element.ns.aml.vocabularies.shapes.ScalarShape
+              element.ns.aml.vocabularies.shapes.ArrayShape
             )
           );
         });