feat(analytics): 更新不蒜子统计脚本并移除本地格式化逻辑

- 将不蒜子统计脚本源地址更新为官方 CDN 地址
- 移除本地实现的访问量格式化脚本
- 依赖外部库自带的格式化功能替代原有手动实现
- 简化代码结构，减少冗余逻辑
- 提升页面加载性能与维护性
- 统一使用外部库的标准格式化规则

about.html

@@ -363,70 +363,5 @@
 
     })();
 </script>
-
-<!-- 自动格式化脚本 -->
-<script>
-    // 核心格式化函数：支持 K / W / M，保留最多两位小数，去除尾随零
-    function formatWithUnit(num) {
-        num = Number(num);
-        if (isNaN(num) || num < 0) return '0';
-
-        // 小于 1000：直接显示
-        if (num < 1_000) {
-            return Math.floor(num).toString();
-        }
-
-        // 1K ~ 9.99K
-        if (num < 10_000) {
-            let val = (num / 1_000).toFixed(2);
-            return parseFloat(val) + 'K';
-        }
-
-        // 1W ~ 99.99W （1W = 10,000）
-        if (num < 1_000_000) {
-            let val = (num / 10_000).toFixed(2);
-            return parseFloat(val) + 'W';
-        }
-
-        // ≥ 1M
-        let val = (num / 1_000_000).toFixed(2);
-        return parseFloat(val) + 'M';
-    }
-
-    // 监听不蒜子数据更新并格式化
-    function initFormatter() {
-        const pvEl = document.getElementById(SiteConfig.analytics.busuanzi.site_pv_id);
-        const uvEl = document.getElementById(SiteConfig.analytics.busuanzi.site_uv_id);
-
-        if (!pvEl && !uvEl) return;
-
-        const observer = new MutationObserver(() => {
-            if (pvEl?.textContent) {
-                const raw = pvEl.textContent.trim().replace(/[,，]/g, '');
-                const num = parseFloat(raw);
-                if (!isNaN(num)) {
-                    pvEl.textContent = formatWithUnit(num);
-                }
-            }
-            if (uvEl?.textContent) {
-                const raw = uvEl.textContent.trim().replace(/[,，]/g, '');
-                const num = parseFloat(raw);
-                if (!isNaN(num)) {
-                    uvEl.textContent = formatWithUnit(num);
-                }
-            }
-        });
-
-        if (pvEl) observer.observe(pvEl, { childList: true, subtree: true });
-        if (uvEl) observer.observe(uvEl, { childList: true, subtree: true });
-    }
-
-    // 启动
-    if (document.readyState === 'loading') {
-        document.addEventListener('DOMContentLoaded', initFormatter);
-    } else {
-        initFormatter();
-    }
-</script>
 </body>
 </html>

js/config.js

@@ -133,7 +133,7 @@ const SiteConfig = {
   // 站点统计配置
   analytics: {
     busuanzi: {
-      src: 'https://events.vercount.one/js',
+      src: '//cdn.busuanzi.cc/busuanzi/3.6.9/busuanzi.abbr.min.js',
       site_pv_id: 'busuanzi_value_site_pv',
       site_uv_id: 'busuanzi_value_site_uv',
       formatter: true