resources/page: Fix slugorcontentbasename for section pages
The slugorcontentbasename permalink token was creating an extra
subdirectory for section pages (_index.md files). This was because
pageToPermalinkContentBaseName did not have the same special handling
for _index.md files as pageToPermalinkFilename.
This commit adds the special handling to return an empty string for
section pages, ensuring backward compatibility with slugorfilename.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Fixes #14104
projects / brevno-suite / hugo / commit