feat: add Text Tools extension page

astro/src/pages/[slug].astro

@@ -18,10 +18,10 @@ const { Content } = await ext.render();
   <section class="ext-hero">
     <div class="container">
       <div class="info">
-        <span class="badge">100% Free</span>
+        <div class="section-label">{ext.slug}</div>
         <h1>{ext.data.name}</h1>
-        <p>{ext.data.tagline}</p>
-        <div style="display:flex;gap:12px">
+        <p class="tagline">{ext.data.tagline}</p>
+        <div class="actions">
           {ext.data.chromeStoreUrl && (
             <a href={ext.data.chromeStoreUrl} class="btn btn-primary" target="_blank" rel="noopener">
               Add to Chrome
@@ -44,14 +44,16 @@ const { Content } = await ext.render();
 
   <section class="section">
     <div class="container">
+      <div class="section-label">Features</div>
       <div class="feature-list">
         {ext.data.features?.map((feature: string) => (
           <div class="feature-item">
-            <h4>✅ {feature}</h4>
+            <span class="check">✓</span>
+            <h4>{feature}</h4>
           </div>
         ))}
       </div>
-      <div style="margin-top:32px">
+      <div class="prose">
         <Content />
       </div>
     </div>