feat: centered footer + auth type toggle pills

- Status bar footer centered within terminal width using lipgloss.Width
- Auth Type field replaced with toggle pills (password/key)
  Space/Enter/←/→ cycle between options on the focused field
  Selected type shown with SelectedStyle/TagStyle (green),
  inactive type shown in muted SubtitleStyle
  Help hint 'Space/←/→ to toggle' shown when focused
- Added toggleAuthType() and cycleAuthType() helpers

pkg/tui/host_form_tab.go

@@ -83,7 +83,6 @@ func newHostFormTab(mode formMode, host *models.Host, dataDir string) *HostFormT
 	inputs[fieldPort].Placeholder = "22"
 	inputs[fieldPort].SetValue("22")
 	inputs[fieldUsername].Placeholder = "root"
-	inputs[fieldAuthType].Placeholder = "password / key / both"
 	inputs[fieldAuthType].SetValue("password")
 	inputs[fieldPassword].EchoMode = textinput.EchoPassword
 	inputs[fieldPassword].Placeholder = "Enter password"
@@ -143,11 +142,22 @@ func (t *HostFormTab) Update(msg tea.Msg) (Tab, tea.Cmd) {
 			return t, func() tea.Msg { return closeFormMsg{} }
 
 		case "enter":
+			if t.focus == fieldAuthType {
+				t.toggleAuthType()
+				return t, nil
+			}
 			if t.focus == fieldCount-1 {
 				return t.submit()
 			}
 			t.nextField()
 
+		case " ", "left", "right":
+			if t.focus == fieldAuthType {
+				t.toggleAuthType()
+				return t, nil
+			}
+			fallthrough
+
 		case "tab", "down":
 			t.nextField()
 
@@ -158,6 +168,10 @@ func (t *HostFormTab) Update(msg tea.Msg) (Tab, tea.Cmd) {
 			return t.submit()
 
 		default:
+			if t.focus == fieldAuthType {
+				// ignore typing on auth type field
+				return t, nil
+			}
 			var cmd tea.Cmd
 			t.inputs[t.focus], cmd = t.inputs[t.focus].Update(msg)
 			return t, cmd
@@ -189,6 +203,22 @@ func (t *HostFormTab) prevField() {
 	t.inputs[t.focus].Prompt = "> "
 }
 
+func cycleAuthType(current string) string {
+	switch current {
+	case "password":
+		return "key"
+	case "key":
+		return "password"
+	default:
+		return "password"
+	}
+}
+
+func (t *HostFormTab) toggleAuthType() {
+	current := t.inputs[fieldAuthType].Value()
+	t.inputs[fieldAuthType].SetValue(cycleAuthType(current))
+}
+
 func (t *HostFormTab) submit() (Tab, tea.Cmd) {
 	name := t.inputs[fieldName].Value()
 	hostname := t.inputs[fieldHostname].Value()
@@ -278,16 +308,35 @@ func (t *HostFormTab) View() string {
 		b.WriteString(style.Render(label + ":"))
 		b.WriteString("\n")
 
-		renderedInput := input.View()
-
-		// Add parentheses showing auth options
-		if i == fieldAuthType && i != t.focus {
+		if i == fieldAuthType {
+			// Render auth type as toggle pills
+			current := input.Value()
+			pills := []string{"password", "key"}
+			var parts []string
+			for _, p := range pills {
+				if p == current {
+					if i == t.focus {
+						parts = append(parts, SelectedStyle.Render(" "+p+" "))
+					} else {
+						parts = append(parts, TagStyle.Render(" "+p+" "))
+					}
+				} else {
+					parts = append(parts, SubtitleStyle.Render(" "+p+" "))
+				}
+			}
 			b.WriteString("  ")
+			b.WriteString(strings.Join(parts, " "))
+			b.WriteString("\n")
+			if i == t.focus {
+				b.WriteString(InfoStyle.Render("   Space/←/→ to toggle"))
+			}
+			b.WriteString("\n")
 		} else {
+			renderedInput := input.View()
 			b.WriteString("  ")
+			b.WriteString(renderedInput)
+			b.WriteString("\n\n")
 		}
-		b.WriteString(renderedInput)
-		b.WriteString("\n\n")
 	}
 
 	// Help text