C14.14: export HTML, HTML and folder, PDF (MuPDF story in the PDF worker) and plain text; print; rich copy

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

packaging/stage.sh

@@ -54,10 +54,13 @@ if uses ely-lok; then
   fi
 fi
 if uses ely-pdf-engine; then
-  tessdata=${ELY_TESSDATA:-$root/engines/tessdata}
-  need "$tessdata/eng.traineddata" scripts/fetch-tessdata.sh
   build -p ely-pdf-engine --bin ely-pdf-worker
   cp "$release/ely-pdf-worker$exe" "$out/"
+fi
+# OCR's languages: ElyPDF alone reads text from pictures.
+if [ "$slug" = ely-pdf ]; then
+  tessdata=${ELY_TESSDATA:-$root/engines/tessdata}
+  need "$tessdata/eng.traineddata" scripts/fetch-tessdata.sh
   mkdir "$out/tessdata"
   cp "$tessdata"/{eng,chi_sim,chi_tra}.traineddata "$out/tessdata/"
 fi