feat(header): update homepage link and add client download link

- Update homepage link to point to https://mineru.org.cn/home
- Add client download link for users to easily access the app- Change globe icon to home icon for homepage

projects/gradio_app/header.html

@@ -102,13 +102,24 @@
 
         <!-- Homepage Link. -->
         <span class="link-block">
-          <a href="https://opendatalab.com/" class="external-link button is-normal is-rounded is-dark" style="text-decoration: none; cursor: pointer">
+          <a href="https://mineru.org.cn/home" class="external-link button is-normal is-rounded is-dark" style="text-decoration: none; cursor: pointer">
             <span class="icon" style="margin-right: 8px">
-              <i class="fas fa-globe" style="color: white"></i>
+              <i class="fas fa-home" style="color: white"></i>
             </span>
             <span style="color: white">Homepage</span>
           </a>
         </span>
+
+        <!-- Client Link. -->
+        <span class="link-block">
+          <a href="https://mineru.org.cn/client" class="external-link button is-normal is-rounded is-dark" style="text-decoration: none; cursor: pointer">
+            <span class="icon" style="margin-right: 8px">
+              <i class="fas fa-download" style="color: white"></i>
+            </span>
+            <span style="color: white">Download</span>
+          </a>
+        </span>
+
       </div>
     </div>