feat(cursor): wire executor through portal, admin, and wechat routes

Register cursor in LLM executor bindings, route page/code tasks through
cursor runtime selection, and bootstrap wechat cursor policy services.

Co-authored-by: Cursor <cursoragent@cursor.com>

chat-skills.test.mjs

@@ -212,6 +212,9 @@ test('buildAutoChatSkillPrefix enables publish for page generation requests', ()
 test('isPageGenerationIntent matches implicit travel guide page requests', () => {
   assert.equal(isPageGenerationIntent('苏州攻略页面'), true);
   assert.equal(isPageGenerationIntent('帮我看看苏州攻略，1日攻略，做一个页面'), true);
+  assert.equal(isPageGenerationIntent('做一个睡前故事页面'), true);
+  assert.equal(isPageGenerationIntent('在页面再加几首唐诗'), true);
+  assert.equal(isPageGenerationIntent('把 bedtime-story.html 再改一下'), true);
   assert.equal(isPageGenerationIntent('你好'), false);
 });