Renders low-resolution JPEG thumbnails (256px, q=0.6) in nodes when
zoomed out (effective width < 300px), swapping to full resolution when
zoomed in. Thumbnails are generated eagerly and cached in memory.
- New utility: imageThumbnail.ts (offscreen canvas downscaling)
- New cache: thumbnailCache.ts (ephemeral Map-based cache)
- New hook: useAdaptiveImageSrc (zoom-aware src selector)
- Integrated into all image-bearing nodes (GenerateImage, ImageInput,
Output, Annotation, SplitGrid, VideoFrameGrab, OutputGallery, GLBViewer)
- Lightbox/modal views always use full resolution
https://claude.ai/code/session_01MvD1n4QeXutgwUpKJuDGHa
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