feat: add remote NodeService client backed by the HTTP API

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

service/node_service.go

@@ -4,6 +4,7 @@ import (
 	"axolotl/models"
 	"axolotl/store"
 	"fmt"
+	"net/http"
 )
 
 // NodeService is the single entry point for all node operations.
@@ -76,6 +77,10 @@ func GetNodeService(cfg Config) (NodeService, error) {
 	if user == "" {
 		return nil, fmt.Errorf("no user configured: run 'ax user set <username>' first")
 	}
+	if rc, ok := cfg.GetRemoteConfig(); ok {
+		base := fmt.Sprintf("http://%s:%d", rc.Host, rc.Port)
+		return &apiClient{base: base, user: user, http: &http.Client{}}, nil
+	}
 	st, err := store.FindAndOpenSQLiteStore()
 	if err != nil {
 		return nil, err