Preserve API item paths while building editor context

src/web/public/js/regions/type/api.js

@@ -306,7 +306,9 @@
     var sourceOptions = String(context.sourceOptions || '');
     var itemsPathValue = context.itemsPath !== undefined
       ? String(context.itemsPath === null ? '' : context.itemsPath)
-      : String(config.default_items_path || '');
+      : config.items_path !== undefined
+        ? String(config.items_path === null ? '' : config.items_path)
+        : String(config.default_items_path || '');
     var sampleDataPreview = String(context.sampleDataPreview || '');
 
     return {

test/api-region-sort.test.js

@@ -256,15 +256,20 @@ test('API editor preserves saved item paths instead of replacing them with the s
   };
 
   for (const [savedPath, expectedPath] of [['data.players', 'data.players'], ['', ''], [null, ''], [undefined, 'data']]) {
-    const markup = editor.renderEditorCard({ ...context, config: { ...context.config, items_path: savedPath } });
-    assert.match(markup, new RegExp('name="region_api_items_path_23"[^>]*value="' + expectedPath.replace('.', '\\.') + '"'));
+    const savedContext = { ...context, config: { ...context.config, items_path: savedPath } };
+    const builtContext = editor.buildEditorCardContext(savedContext, {}, []);
+    assert.equal(builtContext.itemsPath, expectedPath);
+    for (const cardContext of [savedContext, builtContext]) {
+      const markup = editor.renderEditorCard(cardContext);
+      assert.match(markup, new RegExp('name="region_api_items_path_23"[^>]*value="' + expectedPath.replace('.', '\\.') + '"'));
+    }
   }
 
-  const explicitContext = editor.renderEditorCard({
+  const explicitContext = editor.renderEditorCard(editor.buildEditorCardContext({
     ...context,
     itemsPath: 'other.players',
     config: { ...context.config, items_path: 'data.players' }
-  });
+  }, {}, []));
   assert.match(explicitContext, /name="region_api_items_path_23"[^>]*value="other\.players"/);
 });