feat: update dashboard and process manager for unified launcher

Actualiza el dashboard TUI y el process manager para el modelo de launcher
unificado donde todos los agentes corren en un solo proceso.

Dashboard (pkg/tui):
- model.go: campos de estado del launcher (PID, uptime, memory, CPU, log size)
- model.go: ServerMenuOptions(running) contextual, AgentActionOptions(enabled)
- messages.go: MsgAgentsLoaded incluye estado del launcher, MsgServerActionDone/MsgRebuildDone simplificados
- update.go: intents nuevos (Enable/Disable agent, Start/Stop/Restart/Kill launcher)
- view.go: vista de servidor muestra stats del launcher, agentes muestran enabled/disabled

Shell adapter (shell/tui):
- adapter.go: reescrito para usar métodos unificados (StartUnified, StopUnified, ToggleEnabled, StatusAllUnified, UnifiedStats, UnifiedLogTail)

Process manager (shell/process):
- manager.go: métodos StartUnified, StopUnified, KillUnified, IsUnifiedRunning, UnifiedPID, UnifiedStats, UnifiedLogTail, StatusAllUnified, ToggleEnabled

Los agentes ya no se inician/detienen individualmente desde el dashboard.
Se habilitan/deshabilitan en config y se reinicia el launcher para aplicar.

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

pkg/tui/model.go

@@ -24,17 +24,25 @@ type Model struct {
 	StatusMsg    string // flash message ("Started OK", "Error: ...")
 	WindowWidth  int
 	WindowHeight int
+
+	// Unified launcher state
+	LauncherRunning bool
+	LauncherPID     int
+	LauncherUptime  string
+	LauncherMemory  string
+	LauncherCPU     string
+	LauncherLogSize string
 }
 
 // AgentView is a pre-formatted projection of an agent for display.
 type AgentView struct {
-	ID      string
-	Name    string
-	Version string
-	Desc    string
-	Enabled bool
-	Running bool
-	PID     int
+	ID        string
+	Name      string
+	Version   string
+	Desc      string
+	Enabled   bool
+	Running   bool
+	PID       int
 	Instances int    // number of running instances (>1 means duplicates)
 	Uptime    string // formatted: "2h 15m"
 	Memory    string // formatted: "42 MB"
@@ -52,36 +60,39 @@ type MenuOption struct {
 func MainMenuOptions() []MenuOption {
 	return []MenuOption{
 		{Label: "Agents", Desc: "Gestionar agentes"},
-		{Label: "Server", Desc: "Gestionar servidor"},
+		{Label: "Server", Desc: "Gestionar launcher unificado"},
 		{Label: "Quit", Desc: "Salir"},
 	}
 }
 
 // ServerMenuOptions returns the available server-wide actions.
-func ServerMenuOptions() []MenuOption {
+func ServerMenuOptions(running bool) []MenuOption {
+	if running {
+		return []MenuOption{
+			{Label: "Stop", Desc: "Detener el launcher"},
+			{Label: "Restart", Desc: "Reiniciar el launcher"},
+			{Label: "Kill", Desc: "SIGKILL forzado"},
+			{Label: "Rebuild & Restart", Desc: "Build + reiniciar"},
+			{Label: "Logs", Desc: "Ver log del launcher"},
+		}
+	}
 	return []MenuOption{
-		{Label: "Start All", Desc: "Iniciar todos los agentes habilitados"},
-		{Label: "Stop All", Desc: "Detener todos los agentes"},
-		{Label: "Restart All", Desc: "Reiniciar todos los agentes"},
-		{Label: "Kill All", Desc: "SIGKILL forzado a todos"},
-		{Label: "Rebuild & Restart", Desc: "Build + reiniciar activos"},
+		{Label: "Start", Desc: "Iniciar el launcher unificado"},
+		{Label: "Rebuild & Restart", Desc: "Build + iniciar"},
 	}
 }
 
 // AgentActionOptions returns the available actions based on agent state.
-func AgentActionOptions(running bool) []MenuOption {
-	if running {
+func AgentActionOptions(enabled bool) []MenuOption {
+	if enabled {
 		return []MenuOption{
-			{Label: "Start", Desc: "Iniciar otra instancia"},
-			{Label: "Stop", Desc: "Detener todas las instancias"},
-			{Label: "Restart", Desc: "Reiniciar (stop all + start)"},
-			{Label: "Kill", Desc: "SIGKILL forzado a todas"},
-			{Label: "Logs", Desc: "Ver log del agente"},
+			{Label: "Disable", Desc: "Desactivar agente (requiere restart)"},
+			{Label: "Logs", Desc: "Ver log del launcher"},
 		}
 	}
 	return []MenuOption{
-		{Label: "Start", Desc: "Iniciar el agente"},
-		{Label: "Logs", Desc: "Ver log del agente"},
+		{Label: "Enable", Desc: "Activar agente (requiere restart)"},
+		{Label: "Logs", Desc: "Ver log del launcher"},
 	}
 }