fix(frontend): close single 1:1 residuals without legacy paths

Unify TOC ownership, real video episode list, slider overlay, single-query related list, Zibll user-card after-box, and new-route subtitle/meta contracts.

assets/js/video-player.js

@@ -220,9 +220,16 @@
     if (!switchBtn) return;
 
     var container = switchBtn.closest('.aksrt-video') || switchBtn.closest('[data-aksrt-video]');
+    // Single cover: episodes sit in .single-video-footer; player is sibling under .single-video
+    if (!container) {
+      var singleVideo = switchBtn.closest('.single-video, .single-head-cover');
+      if (singleVideo) {
+        container = singleVideo.querySelector('.aksrt-video, [data-aksrt-video]');
+      }
+    }
     if (!container) return;
 
-    var src = switchBtn.dataset.src || switchBtn.getAttribute('href');
+    var src = switchBtn.dataset.src || switchBtn.getAttribute('video-url') || switchBtn.getAttribute('href');
     if (!src) return;
 
     e.preventDefault();
@@ -237,9 +244,14 @@
     }
 
     // 高亮当前集
-    var siblings = container.parentElement ? container.parentElement.querySelectorAll('.switch-video, .switch-iframe') : [];
-    siblings.forEach(function (btn) { btn.classList.remove('is-active'); });
+    var scope = switchBtn.closest('.featured-video-episode') || (container.parentElement || document);
+    var siblings = scope.querySelectorAll('.switch-video, .switch-iframe');
+    siblings.forEach(function (btn) {
+      btn.classList.remove('is-active');
+      btn.classList.remove('active');
+    });
     switchBtn.classList.add('is-active');
+    switchBtn.classList.add('active');
   });
 
   // ── Public API ──