- Add civitai_use_trpc_search and civitai_use_html_fallback config options
- Update search_civitai_for_file to conditionally use tRPC and HTML methods
- Include method flags in cache key to respect search method preferences
- Add checkboxes in options UI to control each CivitAI search method
- Add tooltip badges to all API key labels explaining their purpose
- Persist new settings to localStorage and pass through search pipeline