refactor(assets): self-host all images

Migrated all images from the external host `img.tootaio.com` to be self-hosted within the project's `public` directory. This change improves performance, reliability, and
removes dependency on a third-party service. Additionally, the analytics script has been temporarily disabled.

app/components/index/Hero.vue

@@ -2,7 +2,7 @@
   <div>
     <!-- Hero Banner -->
     <section class="relative bg-primary py-32 md:py-48 lg:py-64 text-center bg-cover bg-center"
-      style="background-image: url('http://img.tootaio.com/i/2025/10/01/nu13l1.jpg');">
+      style="background-image: url('/hero-image.jpg');">
       <!-- 遮罩 -->
       <div class="absolute inset-0 bg-black/40"></div>