Astro 7へ更新し、画像をsrc/へ移行・重複を整理

- astro 6→7 / starlight 0.40→0.42 / sharp更新、markdown-remark導入
- markdownをunified()へ移行、compressHTML:trueで従来の空白を維持
- starlight日本語訳パッチを0.42.5向けに再生成
- 有益な画像をsrc/へ移行しpublic重複を削除、孤立画像を整理
- scripts/optimize-images.mjs を追加（prebuildで自動実行）

1 files changed, 44 insertions, 46 deletions

diff --git a/src/content/docs/index.mdx b/src/content/docs/index.mdx
index 0892e49..e9f404a 100644
--- a/src/content/docs/index.mdx
+++ b/src/content/docs/index.mdx
@@ -4,9 +4,13 @@ description: 小平市議会議員 安竹洋平 — だれもがしあわせに�
 tableOfContents: true
 ---
 
+import { Image } from 'astro:assets';
+import * as assets from '@/assets/images';
+
 <span id="_top"></span>
 
 <div class="home-hero">
+  <Image class="hero-bg" src={assets.hero} alt="" layout="full-width" priority />
   <h1>
       <span class="line">だれもが</span>
       <span class="line">しあわせに</span>
@@ -21,7 +25,7 @@ tableOfContents: true
     <div class="home-sep"><span>皆様へのメッセージ</span></div>
   </div>
   <div class="intro-photo">
-    <img src="/img/portrait.webp" alt="安竹洋平" width="240" height="293" />
+    <Image src={assets.portrait} alt="安竹洋平" width={240} height={293} />
     <p class="photo-caption">安竹　洋平</p>
   </div>
   <div class="intro-text">
@@ -63,11 +67,11 @@ tableOfContents: true
 ### 少年時代
 
 <figure style="text-align:left;margin:1rem 0">
-  <img
-    src="/img/childhood.webp"
+  <Image
+    src={assets.childhood}
     alt="幼少期の写真"
-    width="613"
-    height="600"
+    width={613}
+    height={600}
     style="max-width:100%;height:auto;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1)"
   />
   <figcaption style="font-size:0.85rem;color:var(--sl-color-gray-2);margin-top:0.5rem">幼少期の写真</figcaption>
@@ -78,11 +82,9 @@ tableOfContents: true
 ### 大学時代
 
 <figure style="text-align:left;margin:1rem 0">
-  <img
-    src="/img/univ-earth-planetary-science-with-friend-scaled.webp"
+  <Image
+    src={assets.daigaku}
     alt="大学生時代"
-    width="720"
-    height="351"
     style="max-width:100%;height:auto;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1)"
   />
   <figcaption style="font-size:0.85rem;color:var(--sl-color-gray-2);margin-top:0.5rem">大学生時代</figcaption>
@@ -93,11 +95,11 @@ tableOfContents: true
 ### ソニー社員時代
 
 <figure style="text-align:left;margin:1rem 0">
-  <img
-    src="/img/yasutake-yohei-graphic-board.webp"
+  <Image
+    src={assets.sonyBoard}
     alt="ソニー社員時代"
-    width="480"
-    height="418"
+    width={480}
+    height={418}
     style="max-width:320px;height:auto;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1)"
   />
   <figcaption style="font-size:0.85rem;color:var(--sl-color-gray-2);margin-top:0.5rem">ソニー社員時代</figcaption>
@@ -108,11 +110,11 @@ tableOfContents: true
 ### ベンチャー企業での電池開発
 
 <figure style="text-align:left;margin:1rem 0">
-  <img
-    src="/img/iec-dinner.webp"
+  <Image
+    src={assets.iecDinner}
     alt="国際規格会議 晩餐会にて"
-    width="449"
-    height="263"
+    width={449}
+    height={263}
     style="max-width:100%;height:auto;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1)"
   />
   <figcaption style="font-size:0.85rem;color:var(--sl-color-gray-2);margin-top:0.5rem">国際規格会議 晩餐会にて</figcaption>
@@ -127,22 +129,22 @@ tableOfContents: true
 ### 宇宙飛行士選抜試験への挑戦
 
 <figure style="text-align:left;margin:1rem 0">
-  <img
-    src="/img/astronaut-training-2.webp"
+  <Image
+    src={assets.astronaut2}
     alt="NASA宇宙飛行士訓練施設にて"
-    width="600"
-    height="450"
+    width={600}
+    height={450}
     style="max-width:100%;height:auto;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1)"
   />
   <figcaption style="font-size:0.85rem;color:var(--sl-color-gray-2);margin-top:0.5rem">NASA宇宙飛行士訓練施設にて</figcaption>
 </figure>
 
 <figure style="text-align:left;margin:1rem 0">
-  <img
-    src="/img/astronaut-training-6-1.webp"
+  <Image
+    src={assets.astronaut6}
     alt="ジェット訓練機のシートにて"
-    width="600"
-    height="450"
+    width={600}
+    height={450}
     style="max-width:600px;width:100%;height:auto;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1)"
   />
   <figcaption style="font-size:0.85rem;color:var(--sl-color-gray-2);margin-top:0.5rem">ジェット訓練機のシートにて</figcaption>
@@ -155,11 +157,9 @@ tableOfContents: true
 ### 英語の会を主宰
 
 <figure style="text-align:left;margin:1rem 0">
-  <img
-    src="/img/cookinglish-2-1.webp"
+  <Image
+    src={assets.eigo}
     alt="英語の会イベントでの一コマ"
-    width="720"
-    height="480"
     style="max-width:100%;height:auto;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1)"
   />
   <figcaption style="font-size:0.85rem;color:var(--sl-color-gray-2);margin-top:0.5rem">英語の会イベント（Cookinglish）での一コマ</figcaption>
@@ -172,11 +172,9 @@ tableOfContents: true
 ### 起業、そして父に
 
 <figure style="text-align:left;margin:1rem 0">
-  <img
-    src="/img/yasutake-yohei-7-1.webp"
+  <Image
+    src={assets.kosodate}
     alt="まだ0歳の時の長男と"
-    width="720"
-    height="540"
     style="max-width:100%;height:auto;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1)"
   />
   <figcaption style="font-size:0.85rem;color:var(--sl-color-gray-2);margin-top:0.5rem">まだ0歳の時の長男と</figcaption>
@@ -189,11 +187,11 @@ tableOfContents: true
 ### 小平市議に初当選、そして再選
 
 <figure style="text-align:left;margin:1rem 0">
-  <img
-    src="/img/yasutake-yohei-city-council.webp"
+  <Image
+    src={assets.cityCouncil}
     alt="議場にて"
-    width="578"
-    height="500"
+    width={578}
+    height={500}
     style="max-width:100%;height:auto;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1)"
   />
   <figcaption style="font-size:0.85rem;color:var(--sl-color-gray-2);margin-top:0.5rem">議場にて</figcaption>
@@ -236,39 +234,39 @@ import Updates from '@/components/Updates.astro';
 <div class="activity-grid">
   <a href="/joutyo-koteikyu/" class="activity-card">
     <span class="activity-title">情緒固定級の設置</span>
-    <img src="/img/joutyo-koteikyu-eyecatch.webp" alt="情緒固定級" width="720" height="509" />
+    <Image src={assets.joutyoEyecatch} alt="情緒固定級" width={720} height={509} />
   </a>
   <a href="/koubunsyo-kanri/" class="activity-card">
     <span class="activity-title">公文書管理の不正追及</span>
-    <img src="/img/25914623.webp" alt="公文書管理" width="720" height="480" />
+    <Image src={assets.koubunsyoEyecatch} alt="公文書管理" width={720} height={480} />
   </a>
   <a href="/ijime-judai-jitai/" class="activity-card">
     <span class="activity-title">いじめ重大事態</span>
-    <img src="/img/ijime-judai-jitai-eyecatch.webp" alt="いじめ重大事態" width="640" height="427" />
+    <Image src={assets.ijimeEyecatch} alt="いじめ重大事態" width={640} height={427} />
   </a>
   <a href="/kajo-seigen-kanwa/" class="activity-card">
     <span class="activity-title">過剰な制限の緩和</span>
-    <img src="/img/kajo-eyecatch.webp" alt="マスク制限緩和" width="720" height="771" />
+    <Image src={assets.kajoEyecatch} alt="マスク制限緩和" width={720} height={771} />
   </a>
   <a href="/dislexia-taiou/" class="activity-card">
     <span class="activity-title">ディスレクシア支援</span>
-    <img src="/img/dislexia-eyecatch.webp" alt="ディスレクシア" width="640" height="564" />
+    <Image src={assets.dislexiaEyecatch} alt="ディスレクシア" width={640} height={564} />
   </a>
   <a href="/aiki-kouen/" class="activity-card">
     <span class="activity-title">合気公園の整備</span>
-    <img src="/img/aiki-kouen-eyecatch.webp" alt="合気公園" width="595" height="385" />
+    <Image src={assets.aikiEyecatch} alt="合気公園" width={595} height={385} />
   </a>
   <a href="/fukushi-shisetsu-gyakutai/" class="activity-card">
     <span class="activity-title">障害者虐待の追及</span>
-    <img src="/img/fukushi-gyakutai-eyecatch.webp" alt="障害者虐待" width="720" height="360" />
+    <Image src={assets.fukushiEyecatch} alt="障害者虐待" width={720} height={360} />
   </a>
   <a href="/vaccine-kyuusai-tekiseika/" class="activity-card">
     <span class="activity-title">ワクチン副反応救済制度の適正化</span>
-    <img src="/img/fukuhannou.webp" alt="ワクチン副反応救済制度" width="720" height="360" />
+    <Image src={assets.vaccineEyecatch} alt="ワクチン副反応救済制度" width={720} height={360} />
   </a>
   <a href="/konan-eisei-kumiai/" class="activity-card">
     <span class="activity-title">湖南衛生組合の報酬見直し</span>
-    <img src="/konan-eisei-kumiai/images/konan-eisei-kumiai-icon.webp" alt="湖南衛生組合の議員報酬・給与見直し" width="480" height="331" />
+    <Image src={assets.konanIcon} alt="湖南衛生組合の議員報酬・給与見直し" width={480} height={331} />
   </a>
 </div>