feat: pantalla de tests en el dashboard TUI

Nueva seccion "Tests" en el menu principal del dashboard que permite
ejecutar Go tests, E2E tests (headless y headed), y todos secuencialmente.

- ScreenTests con menu de seleccion de tipo de test
- TestKind enum para identificar el tipo de test ejecutado
- Nuevos intents: IntentRunGoTests, IntentRunE2ETests, IntentRunE2EHeadTests, IntentRunAllTests
- LastTestKind en Model para re-ejecucion con "r"
- runGoTests, runE2ETests, runAllTests en adapter
- "Run Tests" en Server menu reemplazado por navegacion a ScreenTests
- Test output muestra tipo de test en titulo y vuelve a ScreenTests con "0"

Issue: 0023

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

pkg/tui/model.go

@@ -11,9 +11,21 @@ const (
 	ScreenAgentActions        // actions for a selected agent
 	ScreenLogs                // tail log output
 	ScreenServer              // server-wide process management
+	ScreenTests               // test type selection menu
 	ScreenTestOutput          // test run output
 )
 
+// TestKind identifies which test suite to run.
+type TestKind int
+
+const (
+	TestKindNone    TestKind = iota
+	TestKindGo               // go test -tags goolm -count=1 ./...
+	TestKindE2E              // ./dev-scripts/e2e/run.sh
+	TestKindE2EHead          // ./dev-scripts/e2e/run.sh --headed
+	TestKindAll              // Go tests + E2E sequential
+)
+
 // Model is the complete TUI state — pure data.
 type Model struct {
 	Screen       Screen
@@ -33,6 +45,9 @@ type Model struct {
 	LauncherMemory  string
 	LauncherCPU     string
 	LauncherLogSize string
+
+	// Test state
+	LastTestKind TestKind // which test to re-run with "r"
 }
 
 // AgentView is a pre-formatted projection of an agent for display.
@@ -62,10 +77,21 @@ func MainMenuOptions() []MenuOption {
 	return []MenuOption{
 		{Label: "Agents", Desc: "Gestionar agentes"},
 		{Label: "Server", Desc: "Gestionar launcher unificado"},
+		{Label: "Tests", Desc: "Ejecutar tests"},
 		{Label: "Quit", Desc: "Salir"},
 	}
 }
 
+// TestMenuOptions returns the available test types.
+func TestMenuOptions() []MenuOption {
+	return []MenuOption{
+		{Label: "Go Tests", Desc: "go test ./..."},
+		{Label: "E2E Tests", Desc: "Playwright headless"},
+		{Label: "E2E Tests (headed)", Desc: "Playwright con browser"},
+		{Label: "All Tests", Desc: "Go + E2E secuencial"},
+	}
+}
+
 // ServerMenuOptions returns the available server-wide actions.
 func ServerMenuOptions(running bool) []MenuOption {
 	if running {
@@ -75,13 +101,13 @@ func ServerMenuOptions(running bool) []MenuOption {
 			{Label: "Kill", Desc: "SIGKILL forzado"},
 			{Label: "Rebuild & Restart", Desc: "Build + reiniciar"},
 			{Label: "Logs", Desc: "Ver log del launcher"},
-			{Label: "Run Tests", Desc: "Ejecutar todos los tests"},
+			{Label: "Tests", Desc: "Ir a pantalla de tests"},
 		}
 	}
 	return []MenuOption{
 		{Label: "Start", Desc: "Iniciar el launcher unificado"},
 		{Label: "Rebuild & Restart", Desc: "Build + iniciar"},
-		{Label: "Run Tests", Desc: "Ejecutar todos los tests"},
+		{Label: "Tests", Desc: "Ir a pantalla de tests"},
 	}
 }