test: link PDF collision changes to browser smoke

Issue: #484
User-Visible: no

scripts/smoke-links.mjs

@@ -30,12 +30,16 @@ export const SMOKE_LINKS = [
   {
     symbols: [
       'PdfExportRuntime', 'buildPdfPage', 'writePdf', 'stableDimensionEdges',
-      '_openPdfDialog', '_renderPdfDialog',
+      'pdfSegmentTouchesGeometry', 'SegmentIntersection', 'segmentIntersection',
+      'COORDINATE_EPSILON', 'PdfCollisionPoint', 'forEachRingSegment',
+      'pointOnSegment', 'segmentParameter', '_openPdfDialog', '_renderPdfDialog',
     ],
     smokes: ['smoke_pdf_export.mjs'],
     because: 'the #53 production-bundle scenario proves the administrator button, cold-View '
       + 'lazy boundary, real modal, remembered options, browser download and parseable A4 output; '
-      + 'those browser and network effects are outside the pure PDF scene and writer tests',
+      + 'its #484 stepped-facade pass additionally proves the complete external dimension chain '
+      + 'through the shipped collision helper; those browser and network effects are outside '
+      + 'the pure PDF scene and writer tests',
   },
   {
     symbols: [