feat: add move command to relocate SSH hosts between config files

- Add 'move' command with interactive file selector
- Implement atomic host moving between SSH config files
- Support for configs with include directives
- Add comprehensive error handling and validation
- Update help screen with improved two-column layout

internal/ui/help_form.go

@@ -40,64 +40,85 @@ func (m *helpModel) Update(msg tea.Msg) (*helpModel, tea.Cmd) {
 
 func (m *helpModel) View() string {
 	// Title
-	title := m.styles.Header.Render("📖 SSHM - Help & Commands")
+	title := m.styles.Header.Render("📖 SSHM - Commands")
 
-	// Create horizontal sections with compact layout
-	line1 := lipgloss.JoinHorizontal(lipgloss.Center,
-		m.styles.FocusedLabel.Render("🧭 ↑/↓/j/k"),
-		"  ",
-		m.styles.HelpText.Render("navigate"),
-		"    ",
-		m.styles.FocusedLabel.Render("⏎"),
-		"  ",
-		m.styles.HelpText.Render("connect"),
-		"    ",
-		m.styles.FocusedLabel.Render("a/e/d"),
-		"  ",
-		m.styles.HelpText.Render("add/edit/delete"),
+	// Create two columns of commands for better visual organization
+	leftColumn := lipgloss.JoinVertical(lipgloss.Left,
+		m.styles.FocusedLabel.Render("Navigation & Connection"),
+		"",
+		lipgloss.JoinHorizontal(lipgloss.Left,
+			m.styles.FocusedLabel.Render("⏎  "),
+			m.styles.HelpText.Render("connect to selected host")),
+		lipgloss.JoinHorizontal(lipgloss.Left,
+			m.styles.FocusedLabel.Render("i  "),
+			m.styles.HelpText.Render("show host information")),
+		lipgloss.JoinHorizontal(lipgloss.Left,
+			m.styles.FocusedLabel.Render("/  "),
+			m.styles.HelpText.Render("search hosts")),
+		lipgloss.JoinHorizontal(lipgloss.Left,
+			m.styles.FocusedLabel.Render("Tab "),
+			m.styles.HelpText.Render("switch focus")),
+		"",
+		m.styles.FocusedLabel.Render("Host Management"),
+		"",
+		lipgloss.JoinHorizontal(lipgloss.Left,
+			m.styles.FocusedLabel.Render("a  "),
+			m.styles.HelpText.Render("add new host")),
+		lipgloss.JoinHorizontal(lipgloss.Left,
+			m.styles.FocusedLabel.Render("e  "),
+			m.styles.HelpText.Render("edit selected host")),
+		lipgloss.JoinHorizontal(lipgloss.Left,
+			m.styles.FocusedLabel.Render("m  "),
+			m.styles.HelpText.Render("move host to another config")),
+		lipgloss.JoinHorizontal(lipgloss.Left,
+			m.styles.FocusedLabel.Render("d  "),
+			m.styles.HelpText.Render("delete selected host")),
 	)
 
-	line2 := lipgloss.JoinHorizontal(lipgloss.Center,
-		m.styles.FocusedLabel.Render("Tab"),
-		"  ",
-		m.styles.HelpText.Render("switch focus"),
-		"    ",
-		m.styles.FocusedLabel.Render("p"),
-		"  ",
-		m.styles.HelpText.Render("ping all"),
-		"    ",
-		m.styles.FocusedLabel.Render("f"),
-		"  ",
-		m.styles.HelpText.Render("port forward"),
-		"    ",
-		m.styles.FocusedLabel.Render("s/r/n"),
-		"  ",
-		m.styles.HelpText.Render("sort modes"),
+	rightColumn := lipgloss.JoinVertical(lipgloss.Left,
+		m.styles.FocusedLabel.Render("Advanced Features"),
+		"",
+		lipgloss.JoinHorizontal(lipgloss.Left,
+			m.styles.FocusedLabel.Render("p  "),
+			m.styles.HelpText.Render("ping all hosts")),
+		lipgloss.JoinHorizontal(lipgloss.Left,
+			m.styles.FocusedLabel.Render("f  "),
+			m.styles.HelpText.Render("setup port forwarding")),
+		lipgloss.JoinHorizontal(lipgloss.Left,
+			m.styles.FocusedLabel.Render("s  "),
+			m.styles.HelpText.Render("cycle sort modes")),
+		lipgloss.JoinHorizontal(lipgloss.Left,
+			m.styles.FocusedLabel.Render("n  "),
+			m.styles.HelpText.Render("sort by name")),
+		lipgloss.JoinHorizontal(lipgloss.Left,
+			m.styles.FocusedLabel.Render("r  "),
+			m.styles.HelpText.Render("sort by recent connection")),
+		"",
+		m.styles.FocusedLabel.Render("System"),
+		"",
+		lipgloss.JoinHorizontal(lipgloss.Left,
+			m.styles.FocusedLabel.Render("h  "),
+			m.styles.HelpText.Render("show this help")),
+		lipgloss.JoinHorizontal(lipgloss.Left,
+			m.styles.FocusedLabel.Render("q  "),
+			m.styles.HelpText.Render("quit application")),
+		lipgloss.JoinHorizontal(lipgloss.Left,
+			m.styles.FocusedLabel.Render("ESC "),
+			m.styles.HelpText.Render("exit current view")),
 	)
 
-	line3 := lipgloss.JoinHorizontal(lipgloss.Center,
-		m.styles.FocusedLabel.Render("/"),
-		"  ",
-		m.styles.HelpText.Render("search"),
-		"    ",
-		m.styles.FocusedLabel.Render("h"),
-		"  ",
-		m.styles.HelpText.Render("help"),
-		"    ",
-		m.styles.FocusedLabel.Render("q/ESC"),
-		"  ",
-		m.styles.HelpText.Render("quit"),
+	// Join the two columns side by side
+	columns := lipgloss.JoinHorizontal(lipgloss.Top,
+		leftColumn,
+		"    ", // spacing between columns
+		rightColumn,
 	)
 
 	// Create the main content
 	content := lipgloss.JoinVertical(lipgloss.Center,
 		title,
 		"",
-		line1,
-		"",
-		line2,
-		"",
-		line3,
+		columns,
 		"",
 		m.styles.HelpText.Render("Press ESC, h, q or Enter to close"),
 	)