Fixed zoom brush coordinate conversion for UMAP dimred tab#31
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Right now the zoom option does not work correctly. See below:
The brush coordinates returned by Shiny's brushOpts are in proportion space (0–1) when the plot uses a coordinate system that doesn't directly map to data space. This fix converts the brush proportions to actual UMAP coordinate ranges using the data's min/max, so the zoom correctly targets the brushed region. After resolving: