fix: ImageInputNode double-click resize incorrect aspect ratio

Add fullBleed prop so calculateAspectFitSize() uses chromeHeight=0
instead of incorrectly subtracting 100px for non-existent node chrome.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/nodes/ImageInputNode.tsx

@@ -87,6 +87,7 @@ export function ImageInputNode({ id, data, selected }: NodeProps<ImageInputNodeT
       selected={selected}
       contentClassName="flex-1 min-h-0 overflow-clip"
       aspectFitMedia={nodeData.image}
+      fullBleed
     >
       {/* Reference input handle for visual links from Split Grid node */}
       <Handle