feat: link the blog from the site navigation

Blog joins the header nav (desktop and mobile pick it up from the shared
nav array) and the footer Company column, with a small RSS link in the
footer bottom bar.

site/src/components/Footer.astro

@@ -43,6 +43,7 @@ const groups: { title: string; links: { label: string; href: string }[] }[] = [
     title: 'Company',
     links: [
       { label: 'About', href: '/about/' },
+      { label: 'Blog', href: '/blog/' },
       { label: 'Contact', href: '/contact/' },
       { label: 'Brand', href: '/brand/' },
       { label: 'Trust', href: '/trust/' },
@@ -103,6 +104,13 @@ const year = new Date().getFullYear();
           github.com/warmbly/warmbly
         </a>
         <span class="text-xs text-muted-foreground">·</span>
+        <a href="/blog/rss.xml" class="inline-flex items-center gap-1.5 text-xs text-muted-foreground hover:text-foreground transition-colors">
+          <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
+            <path d="M4 11a9 9 0 0 1 9 9" /><path d="M4 4a16 16 0 0 1 16 16" /><circle cx="5" cy="19" r="1" />
+          </svg>
+          RSS
+        </a>
+        <span class="text-xs text-muted-foreground">·</span>
         <p class="text-xs text-muted-foreground">Open source.</p>
       </div>
     </div>

site/src/components/Header.astro

@@ -62,6 +62,7 @@ const nav: NavItem[] = [
   { label: 'Deliverability',href: '/deliverability/',match: '/deliverability' },
   { label: 'Pricing',       href: '/pricing/',       match: '/pricing' },
   { label: 'Learn',         href: '/learn/',         match: '/learn' },
+  { label: 'Blog',          href: '/blog/',          match: '/blog' },
 ];
 
 function active(match?: string) {