Cost monitoring, PTT fix, Devon tuning, WEIRD pool expansion, YT thumbnails, LLM SEO, publish ep37

- Add real-time LLM/TTS cost tracking with live status bar display and post-show reports
- Fix PTT bug where Devon suggestion layout shift stopped recording via mouseleave
- Devon: facts-only during calls, full personality between calls
- Double WEIRD topic pool (109→203), bump weight to 14-25%
- Auto-generate YouTube thumbnails with bold hook text in publish pipeline
- LLM SEO: llms.txt, robots.txt for LLM crawlers, structured data, BreadcrumbList schemas
- Publish episode 37

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

website/sitemap.xml

@@ -2,10 +2,16 @@
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
   <url>
     <loc>https://lukeattheroost.com</loc>
-    <lastmod>2026-02-15</lastmod>
+    <lastmod>2026-03-15</lastmod>
     <changefreq>weekly</changefreq>
     <priority>1.0</priority>
   </url>
+  <url>
+    <loc>https://lukeattheroost.com/llms.txt</loc>
+    <lastmod>2026-03-15</lastmod>
+    <changefreq>weekly</changefreq>
+    <priority>0.5</priority>
+  </url>
   <url>
     <loc>https://lukeattheroost.com/how-it-works</loc>
     <lastmod>2026-03-10</lastmod>
@@ -258,4 +264,10 @@
     <changefreq>never</changefreq>
     <priority>0.7</priority>
   </url>
+  <url>
+    <loc>https://lukeattheroost.com/episode.html?slug=episode-37-secrets-lies-and-coffee-runs</loc>
+    <lastmod>2026-03-15</lastmod>
+    <changefreq>never</changefreq>
+    <priority>0.7</priority>
+  </url>
 </urlset>