Changed PDF filename format to use hyphens instead of underscores for
consistency with other filename components, while keeping API parameter
as `version=with_skills`.
## Changes
**Backend:**
- internal/handlers/cv.go: Add underscore-to-hyphen conversion in filename generation
- New logic: `strings.ReplaceAll(version, "_", "-")` for filename only
- API parameter unchanged: still accepts `version=with_skills`
**Tests:**
- internal/handlers/pdf_test.go: Update expected filenames to use hyphens
- cv-*-with_skills-*.pdf → cv-*-with-skills-*.pdf
**Documentation:**
- Updated all PDF filename references to use hyphens
- PDF-EXPORT-FEATURE.md
- doc/LONG-PDF-GENERATION.md
- PDF-VALIDATION-REPORT.md (new validation report)
**PDFs:**
- Regenerated all 8 PDFs with new naming convention
- Old: cv-short-with_skills-jamr-2025-en.pdf
- New: cv-short-with-skills-jamr-2025-en.pdf
## Examples
API calls unchanged:
- GET /export/pdf?version=with_skills (still works)
Generated filenames:
- cv-short-with-skills-jamr-2025-en.pdf ✓
- cv-long-with-skills-jamr-2025-es.pdf ✓
**Tests:** All passing ✓
**API:** Backwards compatible ✓
Changed PDF export naming convention from 'detailed' to 'short' for better clarity and contrast with 'extended'. Updated:
- Documentation: All references from 'detailed' → 'short'
- JSON data files: Static PDF URLs now use cv-short-jamr-{{YEAR}}-{lang}.pdf
- Frontend modal: Removed 'short' → 'detailed' mapping (now stays as 'short')
- Static PDFs: Renamed cv-detailed-* to cv-short-* (deleted old files)
- Backend validation: Change
juanatsap