[AhmedCodeGuy]

Summary

Ticket: QF-5959

Follow-up to testing PR #24. Production branding counterpart: #25.

• Ports the existing non-Vercel edge-origin fix from main into testing.
• Makes the default and chapter Open Graph routes load internal assets through the local deployment origin instead of the public proxied hostname.
• Restores the testing API routes so test.quran.com can validate the QF-5959 artwork before production release.
• Production already contains this deployment fix, so no additional production code change is required; PR [QF-5959] Apply QDC branding to Open Graph previews #25 remains the release-day branding PR.

Validation

• Reproduced HTTP 500 from the deployed testing /api/og endpoint before the fix.
• next lint passed.
• next build passed.
• 221 functional Playwright endpoint checks passed locally, covering every supported locale, all 114 chapters, verse variants, static pages, and study-mode images.
• QDC branding and payload-budget contracts passed.
• Platform-specific macOS image snapshots were not committed; those checks require the repository CI baseline environment.