style(about): 调整玻璃态模糊值和光斑模糊效果

- 减小玻璃态背景的模糊半径从28px到18px
- 减少光斑元素的模糊值从80px到40px
- 优化标签云计算逻辑，使用缓存宽高避免重复查询
- 改进主题语言监听器，防止重复加载和竞态条件
- 修复标签定位计算，提高渲染性能
- 清理冗余代码和注释

css/about.css

@@ -16,7 +16,7 @@
     --glass-bg: rgba(255, 255, 255, 0.75);
     --glass-border: 1px solid rgba(255, 255, 255, 0.9);
     --glass-shadow: 0 12px 36px rgba(0, 0, 0, 0.12);
-    --glass-blur: 28px;
+    --glass-blur: 18px;
 
     --text-primary: #1f2937;
     --text-secondary: #4b5563;
@@ -88,7 +88,7 @@ body {
 
 /* Ambient Background */
 .aurora-canvas { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
-.glow-spot { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.5; animation: float 20s infinite alternate; }
+.glow-spot { position: absolute; border-radius: 50%; filter: blur(40px); opacity: 0.5; animation: float 20s infinite alternate; }
 .spot-1 { top: -10%; left: -10%; width: 50vw; height: 50vw; background: var(--bg-grad-1); }
 .spot-2 { bottom: -10%; right: -10%; width: 60vw; height: 60vw; background: var(--bg-grad-2); animation-delay: -5s; }
 .noise-layer { position: absolute; inset: 0; opacity: 0.03; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E"); }

js/about.js

@@ -699,18 +699,29 @@ class UIManager {
         }
         
         // 监听主题/语言变化
-        const themeObserver = new MutationObserver(() => {
+        if (this._themeLangObserver) {
+            try { this._themeLangObserver.disconnect(); } catch (_) {}
+        }
+        const prevTheme = document.documentElement.getAttribute('data-theme');
+        const prevLang = document.documentElement.getAttribute('data-lang');
+        this._lastTheme = prevTheme;
+        this._lastLang = prevLang;
+        this._reloading = false;
+        this._themeLangObserver = new MutationObserver(() => {
             const newTheme = document.documentElement.getAttribute('data-theme');
             const newLang = document.documentElement.getAttribute('data-lang');
-            console.log('Theme/Language changed:', newTheme, newLang);
+            if (this._reloading) return;
-            // 延迟执行
+            if (newTheme === this._lastTheme && newLang === this._lastLang) return;
+            this._lastTheme = newTheme;
+            this._lastLang = newLang;
             setTimeout(() => {
-                // 重新加载整个评论组件
+                if (this._reloading) return;
+                this._reloading = true;
                 this.reloadArtalk();
+                this._reloading = false;
             }, 300);
         });
-        
+        this._themeLangObserver.observe(document.documentElement, {
-        themeObserver.observe(document.documentElement, {
             attributes: true,
             attributeFilter: ['data-theme', 'data-lang']
         });
@@ -858,11 +869,13 @@ class UIManager {
                     el.innerText = item.name;
                     el.style.border = 'none';
                     container.appendChild(el);
-                    tags.push({el, x: 0, y: 0, z: 0});
+                    tags.push({el, x: 0, y: 0, z: 0, bw: el.offsetWidth, bh: el.offsetHeight});
                 });
                 
                 // 动态半径，避免容器溢出，使用防抖优化
-                let radius = Math.max(160, Math.min(container.offsetWidth, container.offsetHeight) / 2 - 24);
+                const cw = container.clientWidth;
+                const ch = container.clientHeight;
+                let radius = Math.max(160, Math.min(cw, ch) / 2 - 24);
                 const dtr = Math.PI / 180;
                 let lasta = 1, lastb = 1;
                 let active = false, mouseX = 0, mouseY = 0;
@@ -918,8 +931,8 @@ class UIManager {
                         scale = Math.min(Math.max(scale, 0.7), 1.15);
                         const opacity = (tag.z + radius) / (2 * radius) + 0.2;
                         const zIndex = parseInt(scale * 100);
-                        const left = tag.x + container.offsetWidth / 2 - tag.el.offsetWidth / 2;
+                        const left = tag.x + cw / 2 - tag.bw / 2;
-                        const top = tag.y + container.offsetHeight / 2 - tag.el.offsetHeight / 2;
+                        const top = tag.y + ch / 2 - tag.bh / 2;
                         
                         updates.push({
                             el: tag.el,