feat(node): configure system environment through the desktop workflow

apps/node-agent/README.md

@@ -1,4 +1,12 @@
-# Mission Core Node — Ubuntu system configuration candidate
+# Mission Core Node — system configuration candidate
+
+0.4.0 makes «Настройка окружения» the first system view. A fixed privileged
+helper starts a durable, versioned systemd workflow for packages, the board
+service, network/USB inventory, SSH and Tailscale. Operator-controlled SSH keys
+and Tailscale login are available in the same section. The package bootstraps
+the GUI/service; operational configuration is performed by its UI button.
+Operator copy is OS-neutral; actual OS/version appears only in «Обзор БК».
+Support remains Ubuntu 24.04 LTS Desktop amd64.
 
 0.3.2 also repairs Linux interface inventory: the unprivileged service admits
 AF_NETLINK for OS metadata reads while retaining an empty capability set.
@@ -41,8 +49,8 @@ Version 0.2.0 contains local host/USB/network inventory, persistent Ed25519
 identity, GUI naming, OS-authenticated local launch, redacted report export,
 OpenSSH installation/autostart, and GUI enrollment/revocation of Ed25519 public
 keys for local Ubuntu administrators. The agent and desktop window run
-unprivileged; the polkit helper can only issue a temporary local login. SSH configuration is
-owned by the installer, with conflict detection and cleanup on removal.
+unprivileged; fixed polkit helpers admit only local login and the shipped system/network actions. SSH configuration is
+owned by the versioned environment workflow, with conflict detection and cleanup on removal.
 
 Core pairing/mTLS, sensor plugins, capture, media and
 recovery are subsequent vertical increments, not implemented capabilities of