fix(about): values grid 2x2 layout + Astro v6 content API

- about.astro: change .values-grid from 4 columns to 2x2 (max-width 900px)
  for visual balance with 4 cards. Drop the duplicate 2-col breakpoint
  that became redundant after the desktop change.
- about.astro: switch from deprecated entry.render() to render(entry)
  to match Astro v6 content collection API.
- content.config.ts: pages collection glob pattern '**/*.{md,mdx}'
  silently matched zero files when the collection only had root-level
  files; switch to '*.{md,mdx}' so the loader actually picks up
  about.md and home.md.

src/pages/about.astro

@@ -4,17 +4,31 @@ import Navigation from '../components/Navigation.astro';
 import Footer from '../components/Footer.astro';
 import PageHero from '../components/PageHero.astro';
 import Icon from '../components/Icon.astro';
+import { getEntry, render } from 'astro:content';
+import type { CollectionEntry } from 'astro:content';
+
+const about = await getEntry('pages', 'about') as CollectionEntry<'pages'>;
+const { Content } = await render(about);
 ---
 
 <Base title="เกี่ยวกับเรา | MoreminiMore | รับทำเว็บไซต์ SEO AI Chatbot">
   <Navigation />
 
   <PageHero
-    badge="เกี่ยวกับเรา"
-    title="เพิ่มยอดขาย ลดต้นทุน ลดเวลา — ให้ธุรกิจคุณ"
+    badge={about.data.hero_badge}
+    title="เริ่มจากตรงนี้"
     subtitle="บริษัท มอร์มินิมอร์ จำกัด — นโยบายของเราคือสร้างระบบที่ทำให้ลูกค้ามีกำไรมากขึ้น ไม่ใช่ทำเว็บไซต์ออกมาเยอะแล้วลืม เราเป็น Partner ที่นั่งทำงานข้างคุณจนระบบติดและใช้งานได้จริง"
   />
 
+  <!-- ABOUT CONTENT (from about.md) -->
+  <section class="section">
+    <div class="container">
+      <article class="about-content">
+        <Content />
+      </article>
+    </div>
+  </section>
+
   <!-- STORY SECTION -->
   <section class="section story-section">
     <div class="container">
@@ -177,6 +191,61 @@ import Icon from '../components/Icon.astro';
   .section-soft { background: var(--color-bg-alt); }
   .section-yellow { background: var(--color-primary); }
 
+  /* ABOUT CONTENT (from markdown) */
+  .about-content {
+    max-width: 760px;
+    margin: 0 auto;
+    font-size: 16px;
+    line-height: 1.8;
+    color: var(--color-gray-700);
+  }
+  .about-content :global(h1) {
+    font-family: var(--font-display);
+    font-size: 36px;
+    font-weight: 900;
+    color: var(--color-black);
+    margin-bottom: 24px;
+  }
+  .about-content :global(h2) {
+    font-family: var(--font-display);
+    font-size: 26px;
+    font-weight: 800;
+    color: var(--color-black);
+    margin: 48px 0 16px;
+    padding-top: 24px;
+    border-top: 1px solid var(--color-gray-200);
+  }
+  .about-content :global(h3) {
+    font-family: var(--font-display);
+    font-size: 20px;
+    font-weight: 800;
+    color: var(--color-black);
+    margin: 32px 0 12px;
+  }
+  .about-content :global(p) {
+    margin-bottom: 16px;
+  }
+  .about-content :global(strong) {
+    color: var(--color-black);
+    font-weight: 700;
+  }
+  .about-content :global(blockquote) {
+    border-left: 4px solid var(--color-primary);
+    padding: 16px 20px;
+    margin: 24px 0;
+    background: var(--color-bg-alt);
+    border-radius: 0 var(--radius-md) var(--radius-md) 0;
+    font-style: italic;
+  }
+  .about-content :global(ul),
+  .about-content :global(ol) {
+    padding-left: 24px;
+    margin-bottom: 16px;
+  }
+  .about-content :global(li) {
+    margin-bottom: 8px;
+  }
+
   .section-badge {
     display: inline-block;
     background: var(--color-primary);
@@ -257,11 +326,13 @@ import Icon from '../components/Icon.astro';
     margin-top: 8px;
   }
 
-  /* VALUES */
+  /* VALUES — 2x2 grid for visual balance with 4 cards */
   .values-grid {
     display: grid;
-    grid-template-columns: repeat(4, 1fr);
+    grid-template-columns: repeat(2, 1fr);
     gap: 24px;
+    max-width: 900px;
+    margin: 0 auto;
   }
   .value-card {
     background: var(--color-white);
@@ -384,7 +455,6 @@ import Icon from '../components/Icon.astro';
   /* RESPONSIVE */
   @media (max-width: 1024px) {
     .story-grid { grid-template-columns: 1fr; gap: 40px; }
-    .values-grid { grid-template-columns: repeat(2, 1fr); }
     .process-grid { grid-template-columns: repeat(2, 1fr); }
   }
   @media (max-width: 640px) {