## Summary
Fix production CDN loading issues where URLs like
`https://static.ce-cdn.net//vendor.v57...css` (double slash) were being
generated when the `staticUrl` config has a trailing slash.
## Root Cause
PR #7681 refactored static asset handling and replaced
`urljoin(staticRoot, path)` with `${staticRoot}/${path}` string
interpolation, losing URL normalization that `urljoin` provides.
## Changes
- Replace string interpolation with `urljoin()` in
`createDefaultPugRequireHandler()`
- Add comprehensive tests covering all trailing slash scenarios
- Maintain full backward compatibility with existing configurations
## Test plan
- [x] All existing tests pass
- [x] Added 4 new test cases for static URL handling with various slash
scenarios
- [x] Verified TypeScript compilation and linting
- [x] Tested production CDN scenario where
`staticUrl=https://static.ce-cdn.net/`
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-authored-by: Claude <noreply@anthropic.com>
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