Add node mode with SSH auto-install and Remnawave-style manual deploy.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/db/db.go

@@ -60,6 +60,28 @@ CREATE TABLE IF NOT EXISTS protocols (
     created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
     updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
 );
+
+CREATE TABLE IF NOT EXISTS nodes (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    name TEXT NOT NULL,
+    host TEXT NOT NULL,
+    ssh_port INT NOT NULL DEFAULT 22,
+    ssh_user TEXT NOT NULL DEFAULT 'root',
+    ssh_auth_type TEXT NOT NULL DEFAULT 'password',
+    ssh_secret_enc TEXT NOT NULL DEFAULT '',
+    node_port INT NOT NULL DEFAULT 2222,
+    secret_key TEXT NOT NULL,
+    status TEXT NOT NULL DEFAULT 'pending',
+    install_mode TEXT NOT NULL DEFAULT 'auto',
+    last_error TEXT NOT NULL DEFAULT '',
+    install_log TEXT NOT NULL DEFAULT '',
+    agent_version TEXT NOT NULL DEFAULT '',
+    last_seen_at TIMESTAMPTZ,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_nodes_status ON nodes(status);
 `
 	_, err := db.Exec(schema)
 	return err
@@ -174,5 +196,13 @@ func GetStats(db *sql.DB) (models.DashboardStats, error) {
 		return s, err
 	}
 	err = db.QueryRow(`SELECT COUNT(*) FROM users WHERE role = 'admin'`).Scan(&s.AdminsTotal)
+	if err != nil {
+		return s, err
+	}
+	err = db.QueryRow(`SELECT COUNT(*) FROM nodes`).Scan(&s.NodesTotal)
+	if err != nil {
+		return s, err
+	}
+	err = db.QueryRow(`SELECT COUNT(*) FROM nodes WHERE status = 'online'`).Scan(&s.NodesOnline)
 	return s, err
 }