首页广场：「全部」里翻卡时右上角分类滑块跟着当前卡的归属类跳

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

demo/gch/v4.js

@@ -88,6 +88,11 @@
       c.tabIndex = d === 0 ? 0 : -1;
     });
     pgB.textContent = idx + 1; pgI.textContent = '/' + cards.length;
+    /* 11-02 用户：滑到哪张图，右上角分类小滑块跟着跳到它的归属类（只在「全部」里跳；投稿卡回到「全部」；选了具体分类时不动） */
+    if (cur === '') {
+      var cc = cards[idx] && (cards[idx].className.match(/\bc-(\w+)/) || [])[1] || '';
+      [].forEach.call(sec.querySelectorAll('.g4-cat button'), function (x) { x.classList.toggle('on', x.dataset.cat === cc); });
+    }
     sec.querySelector('.g4-arr.prev').disabled = idx === 0;
   }
   function next() {
@@ -160,7 +165,7 @@
   sec.querySelector('.g4-all').addEventListener('click', function () { go(''); });
   sec.querySelector('.g4-cat').addEventListener('click', function (e) {
     var b = e.target.closest('button[data-cat]');
-    if (!b || b.classList.contains('on')) return;
+    if (!b || b.dataset.cat === cur) return;   // 「全部」里滑块跟着卡片跳，所以按当前筛选判断，不按高亮判断
     [].forEach.call(sec.querySelectorAll('.g4-cat button'), function (x) { x.classList.toggle('on', x === b); });
     paint(b.dataset.cat);
   });