feat: add LinkedIn post and author info

fix: remove duplicate Demo Video section

fix: use HTML video tag for inline playback

cleanup: remove unnecessary files from HF Space

fix: remove tilde causing strikethrough in Markdown

fix: update demo video link to GitHub

feat: add demo video MCP_hackathon.mp4

fix: use batch_upload for Modal Volume SDK + immediate UI feedback

Fix: Use Modal SDK for volume operations

Update: MCP Server temporarily disabled for security

Switch to Modal backend with security

Update README with GitHub links and complete documentation