Refresh website for RocketSim 16.4.6

[AvdLee]

Summary

• document Browser Preview, agent workflow updates, and the final RocketSim 16.4.6 scope
• publish the Browser Preview article and refresh homepage discovery while retaining the original agentic demo
• correct Device Hub, App Store capture, orientation, physical-device, and recording documentation

Validation

• npm run format:check
• npm run lint
• npm test
• npm run typecheck
• npm run build
• npm run knip
• reviewed every changed route locally