Add a demo GIF to the README

[manujajay]

The README would 10× its conversion with a 15-30 second GIF showing the workflow.

What to record

1. Open `/studio`
2. Type a short prompt
3. Pick a style (e.g. Warm Analog Film)
4. Hit Generate
5. Click Edit text on the result
6. Live-edit the headline → watch it re-render
7. Click Download

How

• LICEcap (Mac/Windows, free)
• Kap (Mac, free, nicer output)
• QuickTime → screen record → `ffmpeg -i in.mov -vf "fps=15,scale=1200:-1:flags=lanczos" -loop 0 demo.gif`

Where it goes

`public/assets/demo.gif` — then add to README at the top, right under the contact-sheet hero:

```md

```

Keep it under 5 MB so GitHub doesn't rate-limit.