fix: Various editor / diagnostic improvements (#2363)

- Closes: #2360 
 - Closes: #2328

tests/test-utils.ts

@@ -24,7 +24,10 @@ import {
 import { ActionsManager } from '../src/card-controller/actions/actions-manager';
 import { AutomationsManager } from '../src/card-controller/automations-manager';
 import { CameraURLManager } from '../src/card-controller/camera-url-manager';
-import { CardElementManager } from '../src/card-controller/card-element-manager';
+import {
+  CardElementManager,
+  CardHTMLElement,
+} from '../src/card-controller/card-element-manager';
 import { ConfigManager } from '../src/card-controller/config/config-manager';
 import { CardController } from '../src/card-controller/controller';
 import { DefaultManager } from '../src/card-controller/default-manager';
@@ -626,6 +629,13 @@ export const createParent = (options?: { children?: HTMLElement[] }): HTMLElemen
   return parent;
 };
 
+export const createCardHTMLElement = (): CardHTMLElement => {
+  const element = createLitElement() as CardHTMLElement;
+  element.getCardSize = vi.fn();
+  element.setConfig = vi.fn();
+  return element;
+};
+
 export const createLitElement = (): LitElement => {
   const element = document.createElement('div') as unknown as LitElement;
   element.addController = vi.fn();