fix: 管理员编辑跳过邮箱校验 + 返回顶部 rAF 丝滑滚动 + admin.js 正则笔误 + 页面标题污染

- artalk.js: beforeSubmit 在编辑态跳过昵称/邮箱校验(管理员改评论不再被拦)
- floating-tools.js: 返回顶部/去评论改 rAF + easeInOutCubic 自绘,原生 smooth 不可靠
- admin.js: 修 5 处 //s //n 正则笔误(整脚本 SyntaxError 致后台全灰),需 wrangler deploy
- artalk.html: 显式传 pageTitle(不再读 document.title,PJAX 竞态致文章页标题被记成「留言」)
- artalk.js: conf 缓存合并前剔除 pageKey/pageTitle/pageThumb,杜绝跨页串值

themes/Ying/assets/js/modules/floating-tools.js

@@ -1,3 +1,29 @@
+// 自绘平滑滚动：浏览器原生 behavior:'smooth' 又快又硬（约 300ms 且不可调），
+// 还会被系统的「减少动态效果」降级成瞬移。用 rAF + easeInOutCubic 自绘，
+// 时长随距离自适应，滚动一旦被用户滚轮/触摸打断立即让位。
+window.smoothScrollTo = function(targetY, duration) {
+    var startY = window.scrollY;
+    var diff = targetY - startY;
+    if (Math.abs(diff) < 2) return;
+    // 短距离快、长距离慢一些，但都 clamp 在 420~950ms，保证观感一致
+    var dur = duration || Math.min(950, Math.max(420, Math.abs(diff) * 0.38));
+    if (window.__smoothScrollRAF) cancelAnimationFrame(window.__smoothScrollRAF);
+    var t0 = null, canceled = false;
+    var cancel = function() { canceled = true; };
+    window.addEventListener('wheel', cancel, { once: true, passive: true });
+    window.addEventListener('touchstart', cancel, { once: true, passive: true });
+    var ease = function(t) { return t < 0.5 ? 4 * t * t * t : 1 - Math.pow(-2 * t + 2, 3) / 2; };
+    var step = function(ts) {
+        if (canceled) return;
+        if (t0 === null) t0 = ts;
+        var p = Math.min(1, (ts - t0) / dur);
+        window.scrollTo(0, startY + diff * ease(p));
+        if (p < 1) window.__smoothScrollRAF = requestAnimationFrame(step);
+        else window.__smoothScrollRAF = null;
+    };
+    window.__smoothScrollRAF = requestAnimationFrame(step);
+};
+
 window.refreshFloatingTools = function() {
     if (typeof window.initFloatingTools !== 'function') return;
     var delays = [0, 60, 180];
@@ -105,7 +131,7 @@ window.initFloatingTools = function() {
 
             backToTopButton.addEventListener('click', function(e) {
                 e.preventDefault();
-                window.scrollTo({ top: 0, behavior: 'smooth' });
+                window.smoothScrollTo(0);
             });
         }
 
@@ -206,7 +232,7 @@ window.initFloatingTools = function() {
                 var comments = document.getElementById('Comments') || document.querySelector('.artalk');
                 if (comments) {
                     var y = comments.getBoundingClientRect().top + window.scrollY - 20;
-                    window.scrollTo({ top: y, behavior: 'smooth' });
+                    window.smoothScrollTo(y);
                 }
             });
         }