fix: prepare packages for typescript 7

[czy88840616]

Summary

• remove the unsupported esModuleInterop: false setting and explicitly include Node types
• update CommonJS imports that are invoked or constructed under TypeScript 7 interop semantics
• fix Buffer and WebSocket type incompatibilities exposed by TypeScript 7
• remove the deprecated baseUrl setting from the Next.js package config

Validation

• pnpm exec tsc -p packages/upload/tsconfig.json --noEmit --pretty false
• TypeScript 7 compile sweep completed for the previously failing top-level packages; remaining repo-wide fixture/sample migration is intentionally out of scope.