davidhckh/portfolio-2025 — reverse-engineered prompt

Build me a polished personal developer portfolio for 2025 that feels immersive but still fast and usable. I want it to show project case studies, project previews, tags, media, and links, with copy available in English and German so visitors can switch languages.

Use Vue 3, TypeScript, and Vite, with smooth scrolling and tasteful motion. Add lightweight Three.js and shader moments for the hero or interactive sections, but don’t make it so heavy that it feels slow. Include subtle optional audio using Howler, and make sure animations feel premium with GSAP and Lenis.

Please structure the content so I can easily add or edit projects, preview cards, tags, images, and links without digging through the whole app. Make it responsive, clean, and ready to run locally, build for production, and preview. Look up current docs online if you need to. Keep attribution to the original portfolio source if you base anything on it.