fix: content audit — SEO, cross-links, draft filtering, styling

- Add sitemap.xml and robots.txt (such.software-site)
- Fix blog date on neroswap post (2025→2026)
- Filter draft posts from generateStaticParams and getPost
- Fix stale product list in website-relaunch blog post
- Fix Godot version (4.6→4)
- Add cross-links: product pages→blog posts, blog posts→product pages
- Add OG/Twitter metadata to blog [slug] pages
- Fix Bauhaus Echo privacy: hover color (emerald→blue), contact URL
- Fix Suchoice: card styling (p-6→glass-card), font-semibold→font-bold
- Fix products listing meta to include Suchoice

apps/web/src/lib/blog.ts

@@ -47,6 +47,7 @@ export function getPost(slug: string): Post | null {
 
   const raw = fs.readFileSync(filePath, "utf-8");
   const { data, content } = matter(raw);
+  if (data.draft === true) return null;
   const iso = data.date ?? "";
   return {
     slug,
@@ -65,5 +66,10 @@ export function getAllSlugs(): string[] {
   return fs
     .readdirSync(CONTENT_DIR)
     .filter((f) => f.endsWith(".mdx"))
+    .filter((f) => {
+      const raw = fs.readFileSync(path.join(CONTENT_DIR, f), "utf-8");
+      const { data } = matter(raw);
+      return data.draft !== true;
+    })
     .map((f) => f.replace(/\.mdx$/, ""));
 }