Initial open-source release.

Highlights:

• Self-hosted Express app for team sales assistant workflows.
• Demo sales knowledge base and training-course sample data.
• Customer chat entry, login page, and admin console.
• AI-assisted material analysis and knowledge suggestion flow.
• MIT license, contributing guide, security policy, and roadmap docs.

Validation:

• npm install completed locally.
• npm test passed locally.
• npm run dev served /, /login.html, /admin.html, and /api/health successfully.