Add supplied post images to two posts and to the blog overview cards

- blog/posts/odoo-19-to-20-invoice-migration-with-n8n-and-mcp.html: in-post image
  much.png + og:image
- blog/posts/track-the-oca-modules-you-actually-use.html: in-post image
  oca_module_status.png + og:image
- blog/index.json: optional "image" key on those two entries only (text splice)
- script.js: renderBlog() draws .blog-thumb only when the entry carries an image
- style.css: .blog-thumb rule
- sitemap.xml: lastmod 2026-10-24 for the invoice-migration post

Built by profile webmaster (run 20261024_094206_5c4f28, verified PROBLEMS: 0 /
node --check OK); committed by olchi after that run died on an OpenRouter 402.

blog/posts/track-the-oca-modules-you-actually-use.html

@@ -21,6 +21,7 @@
             content="Every new Odoo release starts the same routine. You install the latest version, open a browser, and begin clicking throu"
         />
         <meta property="og:type" content="article" />
+        <meta property="og:image" content="https://image.office.odoo4projects.com/img/oca_module_status.png" />
         <meta name="twitter:card" content="summary_large_image" />
         <link rel="icon" href="../../images/favicon.ico" />
         <link rel="preconnect" href="https://fonts.googleapis.com" />
@@ -61,6 +62,7 @@
                 font-weight: 700; margin: 1.5rem 0 0.5rem; color: var(--dark);
             }
             .post-meta { color: rgba(33,37,41,0.5); font-size: 0.85rem; margin-bottom: 2rem; }
+            .post-image { width: 100%; border-radius: 0.75rem; margin-bottom: 2rem; box-shadow: 0 2px 8px rgba(13,27,46,0.08); }
             .post-content h2 {
                 font-family: "Inter Tight", sans-serif;
                 font-size: 1.3rem; margin-top: 2rem; color: var(--dark);
@@ -82,6 +84,9 @@
             <article>
                 <h1 class="post-title">Track the OCA Modules You Actually Use — Without Refreshing GitHub Every Day</h1>
                 <div class="post-meta">October 24, 2026 &middot; Tips</div>
+                <img src="https://image.office.odoo4projects.com/img/oca_module_status.png"
+                     alt="Track the OCA Modules You Actually Use — Without Refreshing GitHub Every Day"
+                     class="post-image" loading="lazy" />
                 <div class="post-content">
 <p>Every new Odoo release starts the same routine. You install the latest version, open a browser, and begin clicking through your favourite OCA repositories to find out which modules have been ported — and which ones you will have to live without for a while.</p>