Merge branch 'feature/nextra-16' into development

Upgrade docs to Nextra 4 / Next 16 / React 19 (App Router migration). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Seto Elkahfi committed Jun 21, 2026 at 14:27 UTC 2f382f597174c2fee18c7df3ff9c69f8a06f68a5

No changes.