Ep12 publish, caller prompt overhaul, favicon, publish fixes, website updates

- Reworked caller prompt: edgy/flirty personality, play along with host bits
- Bumped caller token budget (200-550 range, was 150-450)
- Added 20 layered/morally ambiguous caller stories
- Valentine's Day awareness in seasonal context
- Default LLM model: claude-sonnet-4-5 (was claude-3-haiku)
- Publish: SCP-based SQL transfer (fixes base64 encoding on NAS)
- Favicons: added .ico, 48px, 192px PNGs for Google search results
- Website: button layout cleanup, privacy page, ep12 transcript
- Control panel: channel defaults match audio_settings.json
- Disabled OP3 permanently (YouTube ingest issues on large files)

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

backend/config.py

@@ -24,7 +24,7 @@ class Settings(BaseSettings):
 
     # LLM Settings
     llm_provider: str = "openrouter"  # "openrouter" or "ollama"
-    openrouter_model: str = "anthropic/claude-3-haiku"
+    openrouter_model: str = "anthropic/claude-sonnet-4-5"
     ollama_model: str = "llama3.2"
     ollama_host: str = "http://localhost:11434"