fix(theme): fix invalid vp-offset in ssr

src/client/theme-default/components/VPHomeContent.vue

@@ -1,7 +1,10 @@
 <script setup lang="ts">
 import { useWindowSize } from '@vueuse/core'
 
-const { width: vw } = useWindowSize({ includeScrollbar: false })
+const { width: vw } = useWindowSize({
+  initialWidth: 0,
+  includeScrollbar: false
+})
 </script>
 
 <template>