merge: resolve conflicts after merging main

Adapt runtime features (usage tracking, ping, heartbeat) to main's
multi-workspace architecture. Update frontend imports from @multica/types
to @/shared/types after the package consolidation.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/cmd/server/router.go

@@ -144,6 +144,7 @@ func NewRouter(pool *pgxpool.Pool, hub *realtime.Hub, bus *events.Bus) chi.Route
 		r.Route("/api/skills", func(r chi.Router) {
 			r.Get("/", h.ListSkills)
 			r.Post("/", h.CreateSkill)
+			r.Post("/import", h.ImportSkill)
 			r.Route("/{id}", func(r chi.Router) {
 				r.Get("/", h.GetSkill)
 				r.Put("/", h.UpdateSkill)