fix(servers): 主人可放弃服务器、管理员可删除服务器，由 reaper 归档世界后释放或移除

internal/api/api.go

@@ -516,6 +516,11 @@ func (a *API) externalAPIRoutes() []apiRoute {
 		// access routes above (handlers_allowlist.go).
 		{Method: "GET", Pattern: "/api/v1/servers/{name}/allowlist", h: a.handleAllowlistList},
 		{Method: "PUT", Pattern: "/api/v1/servers/{name}/allowlist/{uuid}", h: a.handleAllowlistSetWake},
+		// Retirement: the owner gives the server up, or an admin deletes it. The
+		// request is recorded and the reaper carries it out on its next run
+		// (handlers_retire.go); owner/admin-gated inside the handlers.
+		{Method: "PUT", Pattern: "/api/v1/servers/{name}/retirement", h: a.handleRetire},
+		{Method: "DELETE", Pattern: "/api/v1/servers/{name}/retirement", h: a.handleCancelRetire},
 		{Method: "GET", Pattern: "/api/v1/servers/{name}/status", h: a.handleStatus},
 		// Identity self-read (spec §14 tiering): the panel reads this once at boot to
 		// learn its own tier and decide which navigation surfaces to render. App-tier —