feat(credits): check-in details modal + history; oneline/tilt widgets

Add zibll-like check-in details remote modal (REST/AJAX), history
endpoint, header details link, and keep oneline posts + tilt showcase
widgets from this batch.

assets/js/enhancements2.js

@@ -302,6 +302,10 @@
     initParallax();
     initFloatLabels();
     initSigninCalendar();
+    document.addEventListener('aksrt:remote-modal:open', function () {
+      // Remote modal may inject calendar markup after open.
+      window.setTimeout(initSigninCalendar, 30);
+    });
   });
 
   // 暴露到全局供动态内容使用