Bug: TanStack DB documentation not responsive on mobile #505

Description
On mobile, parts of the TanStack DB page overflow the viewport, causing unwanted horizontal scrolling.

Steps to reproduce

1. Go to https://tanstack.com/db/latest
2. Open in mobile view
3. Scroll horizontally → notice the page overflows.

Expected behavior
The layout should be fully responsive and adapt to small viewports.

Screenshots

Environment

• Device: iPhone 16 Pro — iOS 18.6.2 — Safari
• Also reproduced via Chrome DevTools (MacBook Pro 14", latest Chrome)