Update website with final design, Welcome Gate, security tags and analytics

[uriesmooth]

Goal

Finish the main website update for uriesmooth.online.

Tasks

• Replace index.html with the final professional version
• Add Welcome Gate section
• Add security meta tags
• Add Google Analytics (replace placeholder ID)
• Confirm SSL is working
• Push changes and verify the live site

Related

• Project board: Uriesmooth Platform
• Domain: https://uriesmooth.online