Fix preamble title to be document-specific

The preamble was applying the same hardcoded title to both rules.pdf
and superteam_rules.pdf. Now the title is extracted from each .adoc
file's first line, so each document gets its correct title.

Author: mrshu

.ci/tex-to-pdf.sh

@@ -10,8 +10,15 @@ dblatex -T db2latex $OUTPUT_PREFIX.xml -t tex --texstyle=./manual.sty -p custom.
 # Go through the generated .tex output, find the place where the preamble ends
 # (marked by the \mainmatter command) and create a file without it.
 cat $OUTPUT_PREFIX.tex | awk 'f;/\\mainmatter/{f=1}'  > $OUTPUT_PREFIX"_without_preamble.tex"
-# Concat the standardized preamble with the "without_preamble" version of the file
-cat preamble.tex $OUTPUT_PREFIX"_without_preamble.tex" > $OUTPUT_PREFIX.tex
+
+# Extract the document title from the .adoc file (first line, removing the "= " prefix)
+DOCUMENT_TITLE=$(head -n 1 "$OUTPUT_FILE.adoc" | sed 's/^= //')
+
+# Create a preamble with the correct title substituted
+sed "s/@@DOCUMENT_TITLE@@/$DOCUMENT_TITLE/" preamble.tex > $OUTPUT_PREFIX"_preamble.tex"
+
+# Concat the customized preamble with the "without_preamble" version of the file
+cat $OUTPUT_PREFIX"_preamble.tex" $OUTPUT_PREFIX"_without_preamble.tex" > $OUTPUT_PREFIX.tex
 texliveonfly $OUTPUT_PREFIX.tex
 pdflatex $OUTPUT_PREFIX.tex
 pdflatex $OUTPUT_PREFIX.tex

preamble.tex

@@ -89,7 +89,7 @@
   \fancyhead[R]{\includegraphics[width=8cm]{media/image15.png}}
 }
 
-\title{\vspace{-5ex}RoboCupJunior Soccer Draft Rules 2026\vspace{-5ex}}
+\title{\vspace{-5ex}@@DOCUMENT_TITLE@@\vspace{-5ex}}
 \date{\vspace{-2ex}}
 
 \definecolor{color-1}{rgb}{1,1,1}