- Auto-generate SERVERKIT_ENCRYPTION_KEY in production when missing.
- Detect canonical domain from Host/X-Forwarded-Host; persist via SystemSettings.
- Expand CORS origins dynamically to include the canonical domain.
- Add SystemTab UI to view/save detected panel domain and HTTPS preference.
- Install script writes key, prompts for PANEL_DOMAIN, and sets nginx IP→domain redirect.
- Add backend tests for key bootstrap and domain detection helpers.
