Fix upload: include composer.lock and files/ directory (#807)

* Fix upload: include composer.lock and files/ directory

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* Fix: composer.lock not in repo, don't copy it

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: undera

prepare-upload.sh

@@ -25,6 +25,7 @@ cp site/cfg.php upload/
 cp site/composer.json upload/
 cp -r site/JPGC upload/
 cp site/dat/out.xml upload/dat/
+cp -r site/files upload/ 2>/dev/null || true
 
 php --version
 curl -sS https://getcomposer.org/installer | php