Add speaker-labeled transcripts, favicon, host stream fix, episode page

- Re-label all 8 episode transcripts with LUKE:/CALLER: speaker labels
  using LLM-based diarization (relabel_transcripts.py)
- Add episode.html transcript page with styled speaker labels
- Update publish_episode.py to generate speaker-labeled transcripts
  and copy to website/transcripts/ for Cloudflare Pages
- Add SVG favicon with PNG fallbacks
- Fix CPU issue: tie host audio stream to on-air toggle, not per-caller
- Update how-it-works page with post-production pipeline info
- Add transcript links to episode cards in app.js

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

website/index.html

@@ -20,10 +20,13 @@
   <meta name="twitter:image" content="https://cdn.lukeattheroost.com/media/podcasts/LukeAtTheRoost/cover_feed.png?v=3">
 
   <!-- Favicon -->
-  <link rel="icon" type="image/svg+xml" href="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64'%3E%3Cpath d='M32 4c-2 0-4 2-4 5 0 1 .3 2 .8 3C26 13 24 16 24 20c0 2 .5 4 1.5 5.5L22 28c-2 1-4 3-5 6l-3 10c-.5 2 .5 3 2 3h4l1-4 2 4h6l-1-6 3 6h6l-1-6 3 6h4c1.5 0 2.5-1 2-3l-3-10c-1-3-3-5-5-6l-3.5-2.5C35.5 24 36 22 36 20c0-4-2-7-4.8-8 .5-1 .8-2 .8-3 0-3-2-5-4-5z' fill='%23e8791d'/%3E%3Ccircle cx='30' cy='17' r='1.5' fill='%231a1209'/%3E%3Cpath d='M36 15c1-1 3-1 4 0s1 3 0 4' fill='none' stroke='%23cc2222' stroke-width='2' stroke-linecap='round'/%3E%3Cpath d='M28 22c2 1 4 1 6 0' fill='none' stroke='%23e8791d' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E">
+  <link rel="icon" type="image/svg+xml" href="favicon.svg">
+  <link rel="icon" type="image/png" sizes="32x32" href="favicon-32.png">
+  <link rel="icon" type="image/png" sizes="16x16" href="favicon-16.png">
+  <link rel="apple-touch-icon" href="apple-touch-icon.png">
 
   <link rel="alternate" type="application/rss+xml" title="Luke at the Roost RSS Feed" href="https://podcast.macneilmediagroup.com/@LukeAtTheRoost/feed.xml">
-  <link rel="stylesheet" href="css/style.css">
+  <link rel="stylesheet" href="css/style.css?v=2">
 
   <!-- Structured Data -->
   <script type="application/ld+json">
@@ -232,6 +235,6 @@
 
   <audio id="audio-element" preload="none"></audio>
 
-  <script src="js/app.js"></script>
+  <script src="js/app.js?v=2"></script>
 </body>
 </html>