fix(ui): improve mobile responsiveness for commands and graphs

[Amangp]

Summary

This PR fixes multiple mobile responsiveness issues in the website UI that were causing layout breakage on smaller screens.

Changes

• Prevented long CLI commands (e.g. pip install codegraphcontext) from overflowing cards on small screens
• Ensured command text remains readable by allowing wrapping and horizontal scrolling where appropriate
• Made graph visualizations horizontally scrollable on mobile to avoid clipping while preserving readability
• Replaced content-based widths with flexible, responsive layouts using Tailwind utilities
• Ensured no regression in the desktop layout

Screenshots

Before

After

Testing

• Tested on mobile, tablet, and desktop viewports
• Verified no horizontal overflow on small screens
• Confirmed graph content is fully accessible on mobile
• Checked that desktop layout and behavior remain unchanged

[vercel]

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