fix: harden responsive tui layouts

internal/tui/app.go

@@ -1543,13 +1543,12 @@ func (m *tuiModel) viewConfirm() string {
 	}
 	body := func(width, height int) string {
 		innerWidth := max(1, width-4)
-		lines := []string{dashboardSection(m.confirm.title), ""}
-		lines = append(lines, wrapCells(m.confirm.target, innerWidth)...)
+		innerHeight := max(1, height-2)
+		message := wrapCells(m.confirm.target, innerWidth)
 		if m.confirm.consequence != "" {
-			lines = append(lines, "")
-			lines = append(lines, wrapCells(m.confirm.consequence, innerWidth)...)
+			message = append(message, "")
+			message = append(message, wrapCells(m.confirm.consequence, innerWidth)...)
 		}
-		lines = append(lines, "")
 		cancel := "[ Cancel ]"
 		accept := "[ " + m.confirm.verb + " ]"
 		if m.confirm.focus == confirmCancel {
@@ -1557,11 +1556,23 @@ func (m *tuiModel) viewConfirm() string {
 		} else {
 			accept = errorStyle.Render("> " + accept)
 		}
+		action := cancel + "  " + accept
 		if m.confirm.pending {
-			lines = append(lines, m.confirm.verb+" in progress…")
-		} else {
-			lines = append(lines, cancel+"  "+accept)
+			action = m.confirm.verb + " in progress…"
 		}
+		messageRows := max(0, innerHeight-2)
+		if len(message) > messageRows {
+			message = message[:messageRows]
+			if len(message) > 0 {
+				message[len(message)-1] = truncateCells(strings.TrimSpace(message[len(message)-1])+" …", innerWidth)
+			}
+		}
+		lines := []string{dashboardSection(m.confirm.title)}
+		lines = append(lines, message...)
+		for len(lines) < innerHeight-1 {
+			lines = append(lines, "")
+		}
+		lines = append(lines, action)
 		return renderPaddedPanel(width, height, lines)
 	}
 	return renderScreenShell(screenShell{
@@ -1983,10 +1994,11 @@ func (m *tuiModel) viewTemplates() string {
 				if index == m.templateList.Index() {
 					marker = "> "
 				}
-				lines = append(lines, marker+tpl.template.Name+"  "+tpl.template.Command)
-				if tpl.template.Description != "" && classifyTerminal(width, height) != sizeNarrow {
-					lines = append(lines, "    "+dashboardHelp(tpl.template.Description))
+				line := marker + tpl.template.Name + "  " + tpl.template.Command
+				if tpl.template.Description != "" && classifyShellContent(width) != sizeNarrow {
+					line += "  — " + tpl.template.Description
 				}
+				lines = append(lines, line)
 			}
 			return renderPaddedPanel(width, height, lines)
 		},
@@ -2175,7 +2187,7 @@ func (m *tuiModel) removeTag(name string) {
 // --- Server list footer ---
 
 func (m *tuiModel) renderListHelp(selectedCount int, hasBackgroundResult bool) string {
-	width := m.width - 2
+	width := m.width - 3
 	if width <= 0 {
 		width = 80
 	}

internal/tui/dashboard.go

@@ -16,6 +16,8 @@ func (m *tuiModel) renderServerDashboard() string {
 	if height <= 0 {
 		height = 40
 	}
+	sizeClass := classifyTerminal(width, height)
+	width = max(1, width-1)
 
 	header := m.renderDashboardHeader(width)
 	notification := m.renderDashboardNotification(width)
@@ -29,7 +31,7 @@ func (m *tuiModel) renderServerDashboard() string {
 	}
 
 	var body string
-	switch classifyTerminal(width, height) {
+	switch sizeClass {
 	case sizeWide:
 		leftWidth := width * 62 / 100
 		rightWidth := width - leftWidth - 1

internal/tui/forward.go

@@ -84,7 +84,7 @@ func (m *forwardScreenModel) View() string {
 		notification = errorStyle.Render(fmt.Sprintf("Error: %v", m.err))
 	}
 	body := func(width, height int) string {
-		switch classifyTerminal(width, height) {
+		switch classifyShellContent(width) {
 		case sizeWide:
 			leftWidth := width * 70 / 100
 			rightWidth := width - leftWidth - 1

internal/tui/help_screen.go

@@ -349,7 +349,7 @@ func (m *actionMenuModel) Update(msg tea.Msg) (*actionMenuModel, *string) {
 func (m *actionMenuModel) View() string {
 	body := func(width, height int) string {
 		listLines := m.actionLines(max(1, height-2))
-		if classifyTerminal(width, height) == sizeWide {
+		if classifyShellContent(width) == sizeWide {
 			leftWidth := width * 48 / 100
 			rightWidth := width - leftWidth - 1
 			selected, _ := m.list.SelectedItem().(actionMenuItem)
@@ -360,7 +360,7 @@ func (m *actionMenuModel) View() string {
 				renderPaddedPanel(rightWidth, height, detail), rightWidth,
 			)
 		}
-		if classifyTerminal(width, height) == sizeMedium {
+		if classifyShellContent(width) == sizeMedium {
 			if selected, ok := m.list.SelectedItem().(actionMenuItem); ok && len(listLines) < height-4 {
 				listLines = append(listLines, "", dashboardSection("Selected"), selected.description)
 			}

internal/tui/layout_test.go

@@ -1,6 +1,7 @@
 package tui
 
 import (
+	"fmt"
 	"strings"
 	"testing"
 
@@ -46,6 +47,7 @@ func TestDashboardFitsSupportedTerminalSizes(t *testing.T) {
 			m := New(servers)
 			m.width, m.height = size.width, size.height
 			assertViewFits(t, m.View(), size.width, size.height)
+			assertRightMargin(t, m.View(), size.width)
 			for _, want := range []string{"sshkeeper", "Servers", "Vault", "Enter", "Ctrl+Q"} {
 				if !strings.Contains(m.View(), want) {
 					t.Fatalf("dashboard at %dx%d missing %q:\n%s", size.width, size.height, want, m.View())
@@ -168,6 +170,27 @@ func TestConfirmationFitsSupportedTerminalSizes(t *testing.T) {
 	}
 }
 
+func TestConfirmationKeepsActionsVisibleWithLongContent(t *testing.T) {
+	for _, size := range []struct{ width, height int }{{120, 40}, {80, 24}, {60, 16}} {
+		m := New(nil)
+		m.width, m.height = size.width, size.height
+		m.beginConfirm(confirmState{
+			title:       "Delete port forward?",
+			target:      strings.Repeat("非常に長い-очень-длинный-🔐 ", 20),
+			consequence: strings.Repeat("Active connections can be interrupted. ", 20),
+			verb:        "Delete",
+			parent:      screenForwardList,
+		})
+		view := m.View()
+		assertUnifiedScreen(t, view, size.width, size.height)
+		for _, want := range []string{"[ Cancel ]", "[ Delete ]"} {
+			if !strings.Contains(view, want) {
+				t.Fatalf("confirmation at %dx%d clipped %q:\n%s", size.width, size.height, want, view)
+			}
+		}
+	}
+}
+
 func TestHelpScreensUseUnifiedShell(t *testing.T) {
 	for _, size := range []struct{ width, height int }{{120, 40}, {80, 24}, {60, 16}} {
 		for name, view := range map[string]string{
@@ -218,6 +241,72 @@ func TestManagerScreensUseUnifiedShell(t *testing.T) {
 	}
 }
 
+func TestLayoutMatrixInventoriesEveryScreen(t *testing.T) {
+	covered := map[screen]string{
+		screenList:              "dashboard",
+		screenForm:              "server form",
+		screenSearch:            "manager matrix",
+		screenTags:              "manager matrix",
+		screenTagInput:          "manager matrix",
+		screenTemplates:         "manager matrix",
+		screenTemplateForm:      "template form",
+		screenTemplatePicker:    "manager matrix",
+		screenTemplateMode:      "manager matrix",
+		screenBackgroundResults: "manager matrix",
+		screenHelp:              "help matrix",
+		screenActionMenu:        "action matrix",
+		screenForwardList:       "forward matrix",
+		screenForwardForm:       "forward form matrix",
+		screenTunnelManager:     "manager matrix",
+		screenConfirm:           "confirmation matrix",
+		screenFullHelp:          "help matrix",
+	}
+	for value := screenList; value <= screenFullHelp; value++ {
+		if _, ok := covered[value]; !ok {
+			t.Fatalf("screen %d is missing from the layout matrix", value)
+		}
+	}
+}
+
+func TestShellBreakpointsUseTerminalWidth(t *testing.T) {
+	for _, tt := range []struct {
+		contentWidth int
+		want         terminalSizeClass
+	}{{68, sizeNarrow}, {69, sizeMedium}, {98, sizeMedium}, {99, sizeWide}} {
+		if got := classifyShellContent(tt.contentWidth); got != tt.want {
+			t.Fatalf("content width %d classified as %v, want %v", tt.contentWidth, got, tt.want)
+		}
+	}
+}
+
+func TestTunnelErrorUsesUnifiedShellRows(t *testing.T) {
+	tunnelModel := newTunnelScreenModel(60, 16)
+	tunnelModel.tunnels = []*model.TunnelState{{Name: "prod tunnel", ServerAlias: "prod", LastError: "connection lost\nretry failed"}}
+	tunnelModel.rebuildList()
+	view := tunnelModel.View()
+	assertUnifiedScreen(t, view, 60, 16)
+	if !strings.Contains(view, "connection lost") || !strings.Contains(view, "retry failed") {
+		t.Fatalf("tunnel error was lost:\n%s", view)
+	}
+}
+
+func TestTemplateViewportKeepsSelectedDescribedItemVisible(t *testing.T) {
+	m := New(nil)
+	m.width, m.height = 60, 16
+	templates := make([]*model.CommandTemplate, 20)
+	for index := range templates {
+		templates[index] = &model.CommandTemplate{Name: fmt.Sprintf("template-%02d", index), Command: "echo ok", Description: "description"}
+	}
+	m.setTemplates(templates)
+	m.templateList.Select(len(templates) - 1)
+	m.screen = screenTemplates
+	view := m.View()
+	assertUnifiedScreen(t, view, 60, 16)
+	if !strings.Contains(view, "> template-19") {
+		t.Fatalf("selected template is outside viewport:\n%s", view)
+	}
+}
+
 func TestTemplateFormFitsSupportedTerminalSizes(t *testing.T) {
 	for _, size := range []struct{ width, height int }{{120, 40}, {80, 24}, {60, 16}} {
 		form := newTemplateFormModel(nil, size.width, size.height)
@@ -284,6 +373,15 @@ func assertUnifiedScreen(t *testing.T, view string, width, height int) {
 	}
 }
 
+func assertRightMargin(t *testing.T, view string, width int) {
+	t.Helper()
+	for index, line := range strings.Split(view, "\n") {
+		if got := ansi.StringWidth(line); got > width-1 {
+			t.Fatalf("line %d uses unsafe last terminal column: width=%d terminal=%d", index+1, got, width)
+		}
+	}
+}
+
 type errText string
 
 func (e errText) Error() string { return string(e) }

internal/tui/shell.go

@@ -110,6 +110,17 @@ func splitBlock(block string) []string {
 	return strings.Split(strings.TrimRight(block, "\n"), "\n")
 }
 
+func classifyShellContent(contentWidth int) terminalSizeClass {
+	terminalWidth := contentWidth + 1
+	if terminalWidth >= 100 {
+		return sizeWide
+	}
+	if terminalWidth >= 70 {
+		return sizeMedium
+	}
+	return sizeNarrow
+}
+
 func shellStatus(vaultUnlocked bool, detail string) string {
 	vault := "Vault locked"
 	if vaultUnlocked {

internal/tui/tunnel.go

@@ -2,6 +2,7 @@ package tui
 
 import (
 	"fmt"
+	"strings"
 	"time"
 
 	"github.com/charmbracelet/bubbles/list"
@@ -102,7 +103,7 @@ func (m *tunnelScreenModel) View() string {
 			return renderPaddedPanel(width, height, []string{dashboardHelp("No running tunnels.")})
 		}
 		capacity := max(1, height-2)
-		start, end := visibleServerRange(len(m.tunnels), m.list.Index(), max(1, capacity/2))
+		start, end := visibleServerRange(len(m.tunnels), m.list.Index(), max(1, capacity/3))
 		lines := make([]string, 0, capacity)
 		for index := start; index < end; index++ {
 			item := tunnelItem{state: m.tunnels[index]}
@@ -110,7 +111,10 @@ func (m *tunnelScreenModel) View() string {
 			if index == m.list.Index() {
 				marker = "> "
 			}
-			lines = append(lines, marker+item.Title(), "    "+item.Description())
+			lines = append(lines, marker+item.Title())
+			for _, description := range strings.Split(item.Description(), "\n") {
+				lines = append(lines, "    "+strings.TrimSpace(description))
+			}
 		}
 		return renderPaddedPanel(width, height, lines)
 	}