Add ~38 new image/video models (Imagen 4, FLUX.2, Flux Kontext,
Grok Imagine, Ideogram, Qwen, Runway, Hailuo, Seedance variants,
Kling older, Wan older) with schemas and endpoint routing for
dedicated APIs (Flux Kontext, Runway). Add pageUrl to all Kie
models and update ModelSearchDialog to use it.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>