Frontend competitor research and long-term advantages

The competitor frontend comparison (Modrinth, CurseForge, minecraft.net) and the long-term advantages of our stack live in the Chinese page.

Modrinth (Nuxt 3, Tailwind, edge deployment) is the experience benchmark and CurseForge the counterexample. Our advantages are contract-first codegen, one language across the ecosystem, token-driven theming and dual edge/Docker deployment.