New Inspiration page and workspace, smoother AI creation

This update upgrades the Flux Art experience across AI image generation, AI video generation, and prompt-based creation. The new Inspiration page adds more curated prompt templates for e-commerce hero images, brand posters, social visuals, and short-video storyboards, while the new workspace makes GPT Image 2, Nano Banana, Seedance 2.0, and other models easier to use in one flow.