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

tsconfig.app.tsbuildinfo

@@ -0,0 +1 @@
+{"root":["./src/env.d.ts","./src/main.ts","./src/App.vue","./src/components/FooterView.vue","./src/components/GalaxyCanvas.vue","./src/components/HeroSection.vue","./src/components/SectionBlock.vue"],"version":"5.7.3"}