LaneDNS: Finnish (and Swedish) version of the tools site

Imported from GitHub issue El-SaMa/oma#214 by @El-SaMa.

The site is English only. Operator rule: every user-facing text in native fi + en (sv where we have it), never literal/AI-sounding. Add /fi/ (hreflang, canonical), translate the shell, home, tool pages, results and privacy policy; Finnish search terms matter (e.g. "DNS tarkistus", "sähköpostin toimivuus", "SSL varmenne"). Keep tool slugs stable.

Context (2026-10-14): lanedns.lanetti.fi (Lanetti Tools, standalone PHP site on nilek, repo El-SaMa/lanedns site/) was revamped and OMA became its control plane: usage in /admin/tools/usage, settings in /admin/tools/settings, staff MCP oma.admin_lanetti_tools, config pull GET /api/lanetti-tools/config (link token in LaneDNS storage/oma-link.php). Events: site_events site lanedns.lanetti.fi, tool_run sanitized by services/core-api/src/lanetti-tools/usage-events.ts. Read handbook hosting/netspeed section "OMA is the control plane" and .cursor/rules/lanedns-standalone.mdc (deploy recipe: keep public_html group www-data) before touching LaneDNS.