Fix display of gene segments in TranscriptVariantDiagram (#1117)

This commit fixes the bug where, for transcripts on the reverse strand, the TranscriptVariantDiagram component
was failing to draw the remainder of the gene on either side of the transcript.

Author: azangru

src/content/app/entity-viewer/variant-view/transcript-consequences/transcript-variant-diagram/TranscriptVariantDiagram.tsx

@@ -68,7 +68,7 @@ const Diagram = (
 
   const scale = scaleLinear()
     .domain([1, geneLength])
-    .range([1, width])
+    .range([0, width])
     .interpolate(interpolateRound)
     .clamp(true);
 
@@ -82,10 +82,9 @@ const Diagram = (
   const transcriptWidth = width - distanceFromGeneStart - distanceToGeneEnd;
   const variantX = scale(variantRelativeStart);
 
-  const shouldRenderLeftGeneSegment =
-    transcript.slice.location.start !== geneStart;
+  const shouldRenderLeftGeneSegment = transcript.relative_location.start !== 1;
   const shouldRenderRightGeneSegment =
-    transcript.slice.location.end !== geneEnd;
+    transcript.relative_location.start !== geneLength;
 
   return (
     <svg