Rules: placed in the same change they are created in

hc rule add --before/--after/--first created the rule at the end of its
chain and then moved it: two history entries, two probations, the rule
briefly in force in the wrong place, and in a changeset the place was
lost. POST /rules (and the other ordered kinds) now takes ?before=ID,
?after=ID or ?first=1, kept with the operation when staged.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/server/h_config.go

@@ -6,6 +6,7 @@ import (
 	"net/http"
 	"net/netip"
 	"sort"
+	"strconv"
 	"strings"
 
 	udiff "github.com/aymanbagabas/go-udiff"
@@ -310,7 +311,19 @@ func (s *Server) createObject(w http.ResponseWriter, r *http.Request, p *auth.Pr
 	if _, err := decodeObject(kind, raw); err != nil {
 		return err
 	}
-	return s.change(w, r, p, model.Op{Op: model.OpCreate, Kind: kind, Data: raw})
+	op := model.Op{Op: model.OpCreate, Kind: kind, Data: raw}
+	// ?before=ID, ?after=ID or ?first=1: where it goes in its order.
+	q := r.URL.Query()
+	var place api.MoveInput
+	place.Before, _ = strconv.ParseInt(q.Get("before"), 10, 64)
+	place.After, _ = strconv.ParseInt(q.Get("after"), 10, 64)
+	if queryBool(r, "first") {
+		place.To = "start"
+	}
+	if place.Before != 0 || place.After != 0 || place.To != "" {
+		op.Place, _ = json.Marshal(place)
+	}
+	return s.change(w, r, p, op)
 }
 
 func (s *Server) updateObject(w http.ResponseWriter, r *http.Request, p *auth.Principal) error {