fix(site-builder): HtmlBlock render stops applying style so editor matches published output

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

craft/src/components/basic/HtmlBlock.render.test.tsx

@@ -0,0 +1,51 @@
+import { describe, test, expect, vi } from 'vitest';
+import React from 'react';
+import { createRoot, Root } from 'react-dom/client';
+import { act } from 'react-dom/test-utils';
+
+vi.mock('@craftjs/core', () => ({
+  useNode: (collect?: (node: any) => any) => {
+    const node = { events: { selected: false } };
+    return {
+      connectors: { connect: (el: any) => el, drag: (el: any) => el },
+      actions: { setProp: vi.fn() },
+      ...(collect ? collect(node) : {}),
+    };
+  },
+}));
+
+import { HtmlBlock } from './HtmlBlock';
+
+let container: HTMLDivElement;
+let root: Root;
+
+function render(ui: React.ReactElement) {
+  container = document.createElement('div');
+  document.body.appendChild(container);
+  act(() => {
+    root = createRoot(container);
+    root.render(ui);
+  });
+}
+
+describe('HtmlBlock render ignores the style prop (matches toHtml)', () => {
+  test('a stored backgroundColor/color/padding is NOT applied to the wrapper', () => {
+    render(
+      React.createElement(HtmlBlock as any, {
+        code: '<p>hello</p>',
+        style: { backgroundColor: 'rgb(255, 0, 0)', color: 'rgb(0, 0, 255)', padding: '40px' },
+      }),
+    );
+    const wrapper = container.firstElementChild as HTMLElement;
+    expect(wrapper.style.backgroundColor).toBe('');
+    expect(wrapper.style.color).toBe('');
+    expect(wrapper.style.padding).toBe('');
+  });
+
+  test('the editor affordances survive: minHeight is kept, content still renders', () => {
+    render(React.createElement(HtmlBlock as any, { code: '<p>hello</p>', style: {} }));
+    const wrapper = container.firstElementChild as HTMLElement;
+    expect(wrapper.style.minHeight).toBe('40px');
+    expect(wrapper.innerHTML).toContain('hello');
+  });
+});

craft/src/components/basic/HtmlBlock.toHtml.test.ts

@@ -23,3 +23,13 @@ describe('HtmlBlock.toHtml sanitizes raw code (A4.1)', () => {
     expect(html).toBe('<p>hi</p>');
   });
 });
+
+test('toHtml never emits the style prop (the other half of the render/export contract)', () => {
+  const out = (HtmlBlock as any).toHtml(
+    { code: '<p>hi</p>', style: { backgroundColor: '#ff0000', padding: '40px' } },
+    '',
+  );
+  expect(out.html).toBe('<p>hi</p>');
+  expect(out.html).not.toContain('background');
+  expect(out.html).not.toContain('40px');
+});

craft/src/components/basic/HtmlBlock.tsx

@@ -62,16 +62,21 @@ export function purifyHtml(input: string): string {
   }
 }
 
-export const HtmlBlock: UserComponent<HtmlBlockProps> = ({ code = '', style = {} }) => {
+export const HtmlBlock: UserComponent<HtmlBlockProps> = ({ code = '' }) => {
   const { connectors: { connect, drag }, selected } = useNode((node) => ({ selected: node.events.selected }));
   const clean = useMemo(() => purifyHtml(code), [code]);
   const setRef = (ref: HTMLElement | null): void => { if (ref) connect(drag(ref)); };
+  // The `style` prop is deliberately NOT applied. `toHtml()` emits only the
+  // purified `code`, so anything styled here would show in the editor and
+  // vanish on the live page -- the exact bug this block was reported for.
+  // Wrapper styling belongs in the user's own markup (see the Edit HTML
+  // toolbar's colour control). `style` stays on the props interface so
+  // already-saved sites keep deserializing cleanly.
   return React.createElement('div', {
     ref: setRef,
     style: {
       minHeight: '40px',
       outline: selected ? '2px solid #3b82f6' : 'none',
-      ...style,
     },
     dangerouslySetInnerHTML: { __html: clean },
   });