refactor: navegacion consistente con HandleBack en todas las vistas

Cada vista expone HandleBack() bool que retrocede un nivel interno (logs ->
lista) o indica que esta en estado base. El model principal intercepta q/0/esc
y delega a HandleBack: si retorna true, sale de la TUI; si false, la vista
retrocedio internamente. Elimina manejo duplicado de esc/q/0 en sub-estados.

fn_operations/docker_tui/app/model.go

@@ -53,6 +53,12 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		switch msg.String() {
 		case views.KeyQuit:
 			return m, tea.Quit
+		case "q", "0", "esc":
+			updated, atBase := m.handleBack()
+			if atBase {
+				return updated, tea.Quit
+			}
+			return updated, nil
 		case views.KeyTab:
 			m.activeTab = (m.activeTab + 1) % len(tabNames)
 			return m, m.initActiveView()
@@ -129,6 +135,29 @@ func (m Model) renderTabs() string {
 	return m.Styles.Header.Render("Docker TUI") + "  " + row
 }
 
+// handleBack asks the active view to go back one level.
+// Returns the updated model and true if the view was already at base level (app should quit).
+func (m Model) handleBack() (Model, bool) {
+	switch View(m.activeTab) {
+	case ViewContainers:
+		atBase := m.containers.HandleBack()
+		return m, atBase
+	case ViewImages:
+		atBase := m.images.HandleBack()
+		return m, atBase
+	case ViewVolumes:
+		atBase := m.volumes.HandleBack()
+		return m, atBase
+	case ViewNetworks:
+		atBase := m.networks.HandleBack()
+		return m, atBase
+	case ViewCompose:
+		atBase := m.compose.HandleBack()
+		return m, atBase
+	}
+	return m, true
+}
+
 func (m Model) initActiveView() tea.Cmd {
 	switch View(m.activeTab) {
 	case ViewContainers:

fn_operations/docker_tui/views/compose.go

@@ -134,9 +134,6 @@ func (m ComposeModel) Update(msg tea.Msg) (ComposeModel, tea.Cmd) {
 				if m.scrollOff > 0 {
 					m.scrollOff--
 				}
-			case "esc", "q", "0":
-				m.state = composeList
-				return m, nil
 			}
 			return m, nil
 		}
@@ -156,6 +153,17 @@ func (m ComposeModel) Update(msg tea.Msg) (ComposeModel, tea.Cmd) {
 	return m, cmd
 }
 
+// HandleBack retrocede un nivel. Retorna true si ya estaba en estado base.
+func (m *ComposeModel) HandleBack() bool {
+	switch m.state {
+	case composeLogs:
+		m.state = composeList
+		return false
+	default:
+		return true
+	}
+}
+
 func (m ComposeModel) View() string {
 	switch m.state {
 	case composeLoading, composeAction:

fn_operations/docker_tui/views/containers.go

@@ -132,9 +132,6 @@ func (m ContainersModel) Update(msg tea.Msg) (ContainersModel, tea.Cmd) {
 				if m.scrollOff > 0 {
 					m.scrollOff--
 				}
-			case "esc", "q", "0":
-				m.state = containersList
-				return m, nil
 			}
 			return m, nil
 		}
@@ -155,6 +152,17 @@ func (m ContainersModel) Update(msg tea.Msg) (ContainersModel, tea.Cmd) {
 	return m, cmd
 }
 
+// HandleBack retrocede un nivel. Retorna true si ya estaba en estado base (el caller debe salir).
+func (m *ContainersModel) HandleBack() bool {
+	switch m.state {
+	case containersLogs:
+		m.state = containersList
+		return false
+	default:
+		return true
+	}
+}
+
 func (m ContainersModel) View() string {
 	switch m.state {
 	case containersLoading:

fn_operations/docker_tui/views/images.go

@@ -108,6 +108,11 @@ func (m ImagesModel) Update(msg tea.Msg) (ImagesModel, tea.Cmd) {
 	return m, cmd
 }
 
+// HandleBack retrocede un nivel. Retorna true si ya estaba en estado base.
+func (m *ImagesModel) HandleBack() bool {
+	return true
+}
+
 func (m ImagesModel) View() string {
 	switch m.state {
 	case imagesLoading, imagesAction:

fn_operations/docker_tui/views/networks.go

@@ -104,6 +104,11 @@ func (m NetworksModel) Update(msg tea.Msg) (NetworksModel, tea.Cmd) {
 	return m, cmd
 }
 
+// HandleBack retrocede un nivel. Retorna true si ya estaba en estado base.
+func (m *NetworksModel) HandleBack() bool {
+	return true
+}
+
 func (m NetworksModel) View() string {
 	switch m.state {
 	case networksLoading, networksAction:

fn_operations/docker_tui/views/volumes.go

@@ -104,6 +104,11 @@ func (m VolumesModel) Update(msg tea.Msg) (VolumesModel, tea.Cmd) {
 	return m, cmd
 }
 
+// HandleBack retrocede un nivel. Retorna true si ya estaba en estado base.
+func (m *VolumesModel) HandleBack() bool {
+	return true
+}
+
 func (m VolumesModel) View() string {
 	switch m.state {
 	case volumesLoading, volumesAction: