Add nodes.delete with reauth, activity logs, and Administrators editing.

Allow deleting managed hosts with mandatory inline re-auth, record node mutations in an audit log with a sidebar Logs view, and let Administrators group permissions be edited from the Groups tab.

service/internal/api/authz.go

@@ -10,6 +10,7 @@ import (
 var errUsersManageRequired = errors.New("permission users.manage required")
 var errNodesReadRequired = errors.New("permission nodes.read required")
 var errNodesExecRequired = errors.New("permission nodes.exec required")
+var errNodesDeleteRequired = errors.New("permission nodes.delete required")
 
 // permissionsForUser returns the union of permissions from the user's groups.
 func permissionsForUser(user settings.UserCredential, groups []settings.Group) map[string]struct{} {
@@ -95,3 +96,19 @@ func (app *App) authorizeNodesExec(request *http.Request) error {
 	}
 	return nil
 }
+
+func (app *App) authorizeNodesDelete(request *http.Request) error {
+	user, ok := UserFromContext(request.Context())
+	if !ok {
+		return errors.New("authentication required")
+	}
+
+	payload, err := loadSettingsOrDefault(app.ConfigDir)
+	if err != nil {
+		return err
+	}
+	if !userHasPermission(user, payload.Groups, "nodes.delete") {
+		return errNodesDeleteRequired
+	}
+	return nil
+}