api/v2: list devices sorted by name

SaaS sorts by name. NodeStore order moved on every write, so
order-sensitive Terraform configs showed changes.

hscontrol/api/v2/devices.go

@@ -1,6 +1,7 @@
 package apiv2
 
 import (
+	"cmp"
 	"context"
 	"net/http"
 	"net/netip"
@@ -175,6 +176,11 @@ func registerDevices(api huma.API, b Backend) {
 			out.Body.Devices = append(out.Body.Devices, deviceFromView(node, allFields, b.Cfg.BaseDomain))
 		}
 
+		// The NodeStore holds no order, and Tailscale lists devices by name.
+		slices.SortFunc(out.Body.Devices, func(a, b Device) int {
+			return cmp.Compare(a.Name, b.Name)
+		})
+
 		return out, nil
 	})
 

hscontrol/apiv2_compat_test.go

@@ -851,6 +851,16 @@ func (r *apiReplay) deviceListChecks(t *testing.T, a testcapture.Action, resp []
 	wantBy, gotBy := byLabel(want.Devices), byLabel(got.Devices)
 	checks := []apiCheck{{"listed", sortedStrings(slices.Collect(maps.Keys(wantBy))), sortedStrings(slices.Collect(maps.Keys(gotBy)))}}
 
+	order := func(devs []apiBody) string {
+		labels := make([]string, 0, len(devs))
+		for _, d := range devs {
+			labels = append(labels, r.label("device", d.ID))
+		}
+
+		return strings.Join(labels, ",")
+	}
+	checks = append(checks, apiCheck{"order", order(want.Devices), order(got.Devices)})
+
 	for _, l := range slices.Sorted(maps.Keys(wantBy)) {
 		g, ok := gotBy[l]
 		if !ok {