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/voicemail.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Response>
     <Say voice="woman">Luke at the Roost is off the air right now. Leave a message after the beep and we may play it on the next show!</Say>
-    <Record maxLength="120" action="https://radioshow.macneilmediagroup.com/api/signalwire/voicemail-complete" playBeep="true" />
+    <Record maxLength="120" playBeep="true" />
     <Say voice="woman">Thank you for calling. Goodbye!</Say>
     <Hangup/>
 </Response>