Summary: Lovart adds promotional video generation support

Why It Matters: The product is moving beyond static images and product pages. It now shows it can handle video storyboards and cinematic motion for brands.

What Changed:

• Changed the main hero example from "Product Page" design to "Promotional Video" creation.
• Updated the brand use case from a "Running Brand" to a "Hiking Brand."
• Changed the default video resolution from 800 x 1440 to 1280 x 720.
• Updated the AI agent's output description to focus on storyboards, styleframes, and cinematic motion instead of static product shots.