feat(首页): 婴儿房空隙换成婴儿房导出的无 UI 高清渲染（日/夜两版，夜间底色 #5A5890）(v26100113)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

js/app.js

@@ -3,7 +3,7 @@
 (function () {
   'use strict';
   /* 页面版本号（YYMMDD+序号）：显示在「关于兜爸心选」页底部；bump 时同步 head 注释与 ?v= */
-  var VER = '26100112';
+  var VER = '26100113';
   const $ = (s, c) => (c || document).querySelector(s);
   const $$ = (s, c) => Array.from((c || document).querySelectorAll(s));
 
@@ -3140,7 +3140,10 @@
     place();
     const tick = () => {
       const h = new Date(Date.now() + 8 * 3600e3).getUTCHours();   // 北京时间
-      sec.classList.toggle('is-night', h >= 19 || h < 6);
+      const night = h >= 19 || h < 6;
+      sec.classList.toggle('is-night', night);
+      const img = $('#nypImg'), src = 'assets/img/nursery-' + (night ? 'night' : 'day') + '.jpg';
+      if (img.getAttribute('src') !== src) img.setAttribute('src', src);
     };
     tick(); setInterval(tick, 600e3);
     nurseryRender();