fix(site-builder): final whole-branch review fixes

C1: HtmlBlock's PURIFY_CONFIG omitted 'style' from ALLOWED_ATTR, so the
toolbar colour picker added in this branch was silently deleted by
DOMPurify -- issue #2 was regressed, not fixed. Adds style/id plus table
tags, with tests pinning the markup path in both render and toHtml.

I3: PagesPanel's three confirmation states were not mutually exclusive;
cancelling delete revealed an unbidden reset prompt on a destructive action.

I5: orphan repair logged at console.warn, which the new console buffer
cannot see -- the reporter would never capture the most diagnostic signal
for the still-unreproduced drop bug. Also aligns useWhpApi's initial-load
failure handling with loadState's fallback.

I7: corrects comments (and the design spec) that asserted an orphan
"renders somewhere on the canvas", which a mid-plan audit disproved.

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

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

@@ -33,3 +33,16 @@ test('toHtml never emits the style prop (the other half of the render/export con
   expect(out.html).not.toContain('background');
   expect(out.html).not.toContain('40px');
 });
+
+describe('HtmlBlock.toHtml markup path (C1 review finding)', () => {
+  test('a style attribute inside `code` (e.g. from the toolbar colour picker) reaches exported output', () => {
+    const { html } = toHtml({ code: '<p style="color: #ff0000">red text</p>' }, '');
+    expect(html).toBe('<p style="color: #ff0000">red text</p>');
+  });
+
+  test('a table inside `code` reaches exported output', () => {
+    const code = '<table><tbody><tr><td>Cell</td></tr></tbody></table>';
+    const { html } = toHtml({ code }, '');
+    expect(html).toBe(code);
+  });
+});