fix(nav): stop click ripple from stretching CTA chips

.aksrt-wave was injected into .but without position:absolute, so the
oversized span expanded header publish/VIP buttons on click. Make the
wave absolute, honor .nowave, and skip navbar CTA roots.

assets/js/aksrt-runtime.js

@@ -796,6 +796,10 @@
   document.addEventListener('click', function (e) {
     var target = e.target.closest(RIPPLE_SELECTORS);
     if (!target) return;
+    // Markup opt-out (header publish uses class="nowave") + nav CTA chips
+    if (target.classList.contains('nowave') || target.closest('.nowave')) return;
+    if (target.classList.contains('navbar-cta') || target.closest('.navbar-cta')) return;
+    if (target.closest('.navbar-top .navbar-but, .navbar-top .navbar-vip, .navbar-but-cluster')) return;
     if (target.querySelector('.aksrt-wave')) return;
 
     var rect = target.getBoundingClientRect();
@@ -805,13 +809,18 @@
 
     var wave = document.createElement('span');
     wave.className = 'aksrt-wave';
-    wave.style.cssText = 'width:' + size + 'px;height:' + size + 'px;left:' + x + 'px;top:' + y + 'px;';
+    // Must be absolute — without it the huge span expands the button box ("变长").
+    wave.style.cssText = 'position:absolute;pointer-events:none;border-radius:50%;background:rgba(255,255,255,0.35);width:'
+      + size + 'px;height:' + size + 'px;left:' + x + 'px;top:' + y + 'px;transform:scale(0);animation:aksrtWaveRipple .6s ease-out forwards;';
 
-    var pos = getComputedStyle(target).position;
-    if (pos === 'static') target.style.position = 'relative';
+    var cs = getComputedStyle(target);
+    if (cs.position === 'static') target.style.position = 'relative';
+    if (cs.overflow === 'visible') target.style.overflow = 'hidden';
 
     target.appendChild(wave);
-    setTimeout(function () { wave.remove(); }, 600);
+    setTimeout(function () {
+      if (wave.parentNode) wave.parentNode.removeChild(wave);
+    }, 600);
   });
 
   // ══════════════════════════════════════════════════════════════