feat: Migrate landing page to Vue 3 + TypeScript

- Replace static HTML with Vue 3 SPA (Vite + TypeScript)
- Add GalaxyCanvas component (interactive particle animation)
- Component-based sections (HeroSection, SectionBlock, FooterView)
- Add nginx.conf with SPA routing + security headers
- Update compose.yaml to mount nginx config
- Build output in html/ directory

compose.yaml

@@ -12,6 +12,7 @@ services:
           memory: 16M
     volumes:
       - ./html:/usr/share/nginx/html:ro
+      - ./nginx.conf:/etc/nginx/conf.d/default.conf:ro
     networks:
       - proxy
     labels: