Fix palette import path for OJS runtime (#115)

OJS resolves relative imports against its own runtime path
(/site_libs/quarto-ojs/), not the page URL — so ../assets/js/...
became /site_libs/assets/js/... (404). Use an absolute URL built
from document.baseURI so it resolves against the page instead.

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

Author: rdhyee

tutorials/isamples_explorer.qmd

@@ -38,7 +38,7 @@ cross_filter_url = "https://data.isamples.org/isamples_202601_facet_cross_filter
 sample_facets_url = "https://data.isamples.org/isamples_202601_sample_facets_v2.parquet"
 
 // Source color scheme — imported from canonical palette (issue #113)
-_palette = await import('../assets/js/source-palette.js')
+_palette = await import(new URL('/assets/js/source-palette.js', document.baseURI).href)
 SOURCE_COLORS = _palette.SOURCE_COLORS
 
 // Cesium colors

tutorials/parquet_cesium_isamples_wide.qmd

@@ -96,7 +96,7 @@ viewof viewModeToggle = Inputs.radio(["clustered", "all points"], {
 ```{ojs}
 //| echo: false
 // Source color scheme — imported from canonical palette (issue #113)
-_palette = await import('../assets/js/source-palette.js')
+_palette = await import(new URL('/assets/js/source-palette.js', document.baseURI).href)
 CLUSTER_COLORS = _palette.SOURCE_COLORS
 
 // H3 resolution based on camera height

tutorials/progressive_globe.qmd

@@ -207,7 +207,7 @@ facets_url = `${R2_BASE}/isamples_202601_sample_facets.parquet`
 facet_summaries_url = `${R2_BASE}/isamples_202601_facet_summaries.parquet`
 
 // Canonical palette — see issue #113
-_palette = await import('../assets/js/source-palette.js')
+_palette = await import(new URL('/assets/js/source-palette.js', document.baseURI).href)
 SOURCE_COLORS = _palette.SOURCE_COLORS
 SOURCE_NAMES = _palette.SOURCE_NAMES