[app-bug] PDF export ships without logo/header/footer or page-break logic

[Gbangbolaoluwagbemiga]

Problem

The PDF exporter (jspdf) produces an unbranded text dump. There's no Sanctifier header, no page numbers, no severity-coloured bars, and long findings can split mid-block.

Acceptance Criteria

• Header with branding/logo.png and project name on every page
• Footer with page number and ISO scan timestamp
• Severity badges rendered as coloured rectangles, not just words
• Page-break detection so a finding never splits across pages
• Visual regression test: snapshot first page rendering

Pointers

• frontend/app/lib/export-pdf.ts
• branding/logo.png

Difficulty

Medium. jspdf API is fiddly but tractable.