Add a "Generate Sitemap" function to the Blog menu that generates a standard XML sitemap in the project's html/ folder. The sitemap includes entries for all published posts, archive pages (year, month, day), category pages, and tag pages using the preview server URL structure. Runs as a background task with progress tracking via the task manager. https://claude.ai/code/session_01PdJyxeeNGf4Bkxvq86GVaZ