feat: add contact section with WeChat QR and email

- Website: contact section with WeChat QR code, email, GitHub links
- README: contact section with QR image and email

website/index.html

@@ -565,6 +565,41 @@
     </div>
 </div>
 
+<!-- Contact -->
+<section>
+    <h2>
+        <span class="zh">联系我们</span>
+        <span class="en hidden">Contact</span>
+    </h2>
+    <p class="section-sub">
+        <span class="zh">问题反馈、合作交流、技术咨询</span>
+        <span class="en hidden">Feedback, collaboration, technical support</span>
+    </p>
+    <div style="display: flex; flex-wrap: wrap; gap: 40px; justify-content: center; align-items: center;">
+        <div style="text-align: center;">
+            <img src="wechat-qr.jpg" alt="WeChat QR" style="width: 200px; height: 200px; border-radius: 12px; border: 1px solid var(--border);">
+            <p style="margin-top: 12px; color: var(--text-dim); font-size: 14px;">
+                <span class="zh">微信扫码添加</span>
+                <span class="en hidden">Scan to add on WeChat</span>
+            </p>
+        </div>
+        <div style="text-align: left;">
+            <p style="margin-bottom: 16px; font-size: 16px;">
+                <span style="color: var(--text-dim);">Email:</span>
+                <a href="mailto:hefangsheng@gmail.com" style="color: var(--accent); text-decoration: none;">hefangsheng@gmail.com</a>
+            </p>
+            <p style="margin-bottom: 16px; font-size: 16px;">
+                <span style="color: var(--text-dim);">GitHub:</span>
+                <a href="https://github.com/dongsheng123132" style="color: var(--accent); text-decoration: none;">dongsheng123132</a>
+            </p>
+            <p style="font-size: 16px;">
+                <span style="color: var(--text-dim);">Website:</span>
+                <a href="https://u-claw.org" style="color: var(--accent); text-decoration: none;">u-claw.org</a>
+            </p>
+        </div>
+    </div>
+</section>
+
 <footer>
     <p>
         🦞 U-Claw — Made by
@@ -573,7 +608,8 @@
     </p>
     <p style="margin-top: 8px;">
         <a href="https://github.com/dongsheng123132/u-claw">GitHub</a> ·
-        <a href="https://github.com/openclaw/openclaw">OpenClaw</a>
+        <a href="https://github.com/openclaw/openclaw">OpenClaw</a> ·
+        <a href="mailto:hefangsheng@gmail.com">hefangsheng@gmail.com</a>
     </p>
 </footer>