Nano Banana 2 Lite is live, with new Grok topic pages

This update brings Nano Banana 2 Lite to Flux Art for fast 1K drafts, lightweight image editing, ecommerce hero image concepts, and social visual directions. We also added topic content for Grok Imagine and Grok Imagine Image Pro, expanding AI image generation scenarios for product visuals, campaign posters, and reference-based edits. Platform stability was improved as well, with better error reporting, network retries, and upload reliability.