Add OG preview banner for social media link cards

Add architecture diagram to How It Works section on GitHub Pages

Replace ASCII architecture diagram with polished SVG

Fix broken logo in GitHub Pages by copying SVG into docs folder

Accept directory path for KB configuration, auto-append curated_sources.yaml

Enhance .gitignore with common entries and exclude instructions.html

Remove 08_ prefix from bookmarked_content directory name

Rebrand to AgentMarKB and prepare for open-source release

Fix service worker registration and move HTML→MD conversion to content scripts

Add full content bookmark extraction with Obsidian integration

Fix content script filename for generic_web platform

Add CLAUDE.md with architecture guidance

Initial implementation of KB Manager Chrome Extension