feat(i18n): 支持通过URL参数设置语言

- 新增从URL查询参数中读取lang值的功能
- 支持lang参数为zh或en时设置并存储语言
- 保留原有的本地存储语言获取逻辑作为备用方案
- 添加错误处理防止URL解析异常

chore(assets): 更新微信二维码图片路径

- 将about.html中的微信二维码图片地址改为相对路径
- 将index.html中的微信二维码图片地址改为相对路径
- 移除远程CDN备用加载逻辑，统一使用本地资源

about.html

@@ -306,7 +306,7 @@
             <button class="modal-close" onclick="toggleWechat()"><i class="ri-close-line"></i></button>
             <h3 data-i18n="modal.wechat">Official Account</h3>
             <div class="qr-box">
-                <img src="https://blog-file.hehouhui.cn/wechat/mp-honesy.jpg" alt="WeChat QR" onerror="this.style.display='none';this.nextElementSibling.style.display='block'">
+                <img src="./images/mp-honesy.jpg" alt="WeChat QR" onerror="this.style.display='none';this.nextElementSibling.style.display='block'">
 <!--                <div class="qr-fallback">QR Load Failed</div>-->
             </div>
             <p data-i18n="modal.desc">Scan to follow Tech Share</p>

index.html

@@ -263,7 +263,7 @@
             <div class="weixin-qrcode-container">
                 <div class="weixin-qrcode-title">扫描二维码</div>
                 <div class="weixin-qrcode-desc">请使用微信扫一扫添加关注</div>
-                <img src="https://blog-file.hehouhui.cn/wechat/mp-honesy.jpg" alt="微信二维码"
+                <img src="./images/mp-honesy.jpg" alt="微信二维码"
                      class="weixin-qrcode-image"
                      onerror="this.src='https://cdn.jsdmirror.com/gh/listener-He/Home/images/logo.png'; this.alt='二维码加载失败'">
                 <button class="weixin-qrcode-close" onclick="closeWeixin()">关闭</button>

js/about.js

@@ -63,7 +63,23 @@ class AppCore {
    =========================== */
 class I18nManager {
     constructor() {
-        this.lang = getStoredLanguage();
+        // 获取当前请求参数有无 lang 参数
+        try {
+            this.query = new URLSearchParams(window.location.search);
+            if (this.query.has('lang')) {
+                let lang = this.query.get('lang');
+                if (lang === 'zh' || lang === 'en') {
+                    this.lang = lang;
+                    setStoredLanguage(lang);
+                }
+            }
+        } catch (e) {
+            console.error(e);
+        }
+
+        if (!this.lang) {
+            this.lang = getStoredLanguage();
+        }
         this.dict = {
             zh: {
                 "nav.home": "首页",