Fill the Car Brain article row and fit the stack diagram

[Fremen1990]

Summary

• Replace the single opening phone and the half-empty pair with one centered row: home, refuels, and service history. The home caption is one line. The sample-data sentence stays under that row.
• Restack the Expo and Appwrite diagram below 700px so both boxes are on screen. The wide layout stays a single row. The caption no longer asks the reader to scroll the diagram.
• In Terminal light, Appwrite's words use the text color so the contrast clears 4.5:1. The accent border still marks the box.

Test plan

• Blog unit tests, typecheck and lint
• e2e/blog.spec.ts (28 tests), including 390 and 320 where the Appwrite label stays inside the viewport
• Desktop row of three and the stacked phone diagram checked in the browser
• CI green, then merge and confirm both live article URLs

Made with Cursor