feat: embed announcement slides

Author: ryoppippi

2025/src/components/AnnouncementSlide.astro

@@ -0,0 +1,9 @@
+<iframe
+  src="https://docs.google.com/presentation/d/e/2PACX-1vT62Rl7c-bAJ4l2REq__4nvaLW4ZCuTEblh1PGpOa2ZA2Wg6jUm08KWTP-liYFLe2m80RFd5oB-DP8v/embed?start=false&loop=false&delayms=3000"
+  frameborder="0"
+  width="960"
+  height="569"
+  allowfullscreen="true"
+  mozallowfullscreen="true"
+  webkitallowfullscreen="true"
+/>

2025/src/pages/en.astro

@@ -1,5 +1,6 @@
 ---
 import Layout from '../layouts/Layout.astro';
+import AnnouncementSlide from '../components/AnnouncementSlide.astro';
 ---
 
 <Layout lang="en">
@@ -68,6 +69,7 @@ import Layout from '../layouts/Layout.astro';
         For questions or proposals regarding sponsorship, please feel free to contact us through the form below or via email.<br>
         <b>※ Information will be updated regularly.</b>
       </p>
+      <AnnouncementSlide client:visible/>
       <p style="text-align: center;">
         <a class="btn" href="https://docs.google.com/forms/d/e/1FAIpQLSfPMjGwsmjOhzxXf_e65uyIb0ml35iIdCYq5EEoSI4KompK3w/viewform" target="blank">
           Contact Form

2025/src/pages/ja.astro

@@ -1,5 +1,6 @@
 ---
 import Layout from '../layouts/Layout.astro';
+import AnnouncementSlide from '../components/AnnouncementSlide.astro';
 ---
 
 <Layout>
@@ -43,7 +44,6 @@ import Layout from '../layouts/Layout.astro';
       </p>
     </div>
   </section>
-
   <section>
     <div class="container sponsor-info">
       <h2 id="スポンサーシップ概要" class="section-title"><a href="#スポンサーシップ概要">スポンサーシップ概要</a></h2>
@@ -72,6 +72,7 @@ import Layout from '../layouts/Layout.astro';
         スポンサーシップに関するご質問、ご提案などにつきましては、下記のフォームまたはメールにてお気軽にお問い合わせください。<br>
         <b>※最新情報は随時更新していきます。</b>
       </p>
+      <AnnouncementSlide client:visible/>
       <p style="text-align: center;">
         <a class="btn" href="https://docs.google.com/forms/d/e/1FAIpQLSfPMjGwsmjOhzxXf_e65uyIb0ml35iIdCYq5EEoSI4KompK3w/viewform" target="blank">
           お問い合わせフォームへ