If xhtml2pdf fails to install on Flatlogic's server (missing C
libraries), the top-level import crashed the entire WSGI app.
Now it imports lazily inside render_to_pdf() so the app starts
even without xhtml2pdf — only PDF generation degrades gracefully.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- core/utils.py: render_to_pdf() wrapper for xhtml2pdf
- core/templates/core/pdf/payslip_pdf.html: A4 PDF payslip (matches V2 layout)
- core/templates/core/email/payslip_email.html: HTML email body for Spark
- core/templates/core/payslip.html: browser payslip detail page with print
- core/views.py: add payslip_detail view, wire email+PDF into process_payment
- core/urls.py: add payroll/payslip/<pk>/ route
- config/settings.py: add SPARK_RECEIPT_EMAIL setting
- payroll_dashboard.html: add "View" payslip link in Payment History tab
All templates show adjustments (bonuses, deductions, overtime, loan repayments)
as line items. Amounts always show 2 decimal places. Email failure does not
roll back payment — handled gracefully with warning message.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
