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/move_form.go

@@ -0,0 +1,188 @@
+package ui
+
+import (
+	"fmt"
+
+	"github.com/Gu1llaum-3/sshm/internal/config"
+
+	tea "github.com/charmbracelet/bubbletea"
+)
+
+type moveFormModel struct {
+	fileSelector *fileSelectorModel
+	hostName     string
+	configFile   string
+	width        int
+	height       int
+	styles       Styles
+	state        moveFormState
+}
+
+type moveFormState int
+
+const (
+	moveFormSelectingFile moveFormState = iota
+	moveFormProcessing
+)
+
+type moveFormSubmitMsg struct {
+	hostName   string
+	targetFile string
+	err        error
+}
+
+type moveFormCancelMsg struct{}
+
+// NewMoveForm creates a new move form for moving a host to another config file
+func NewMoveForm(hostName string, styles Styles, width, height int, configFile string) (*moveFormModel, error) {
+	// Get all config files except the one containing the current host
+	files, err := config.GetConfigFilesExcludingCurrent(hostName, configFile)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get config files: %v", err)
+	}
+
+	if len(files) == 0 {
+		return nil, fmt.Errorf("no other config files available to move host to")
+	}
+
+	// Create a custom file selector for move operation
+	fileSelector, err := newFileSelectorFromFiles(
+		fmt.Sprintf("Select destination config file for host '%s':", hostName),
+		styles,
+		width,
+		height,
+		files,
+	)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create file selector: %v", err)
+	}
+
+	return &moveFormModel{
+		fileSelector: fileSelector,
+		hostName:     hostName,
+		configFile:   configFile,
+		width:        width,
+		height:       height,
+		styles:       styles,
+		state:        moveFormSelectingFile,
+	}, nil
+}
+
+func (m *moveFormModel) Init() tea.Cmd {
+	return m.fileSelector.Init()
+}
+
+func (m *moveFormModel) Update(msg tea.Msg) (*moveFormModel, tea.Cmd) {
+	switch msg := msg.(type) {
+	case tea.WindowSizeMsg:
+		m.width = msg.Width
+		m.height = msg.Height
+		m.styles = NewStyles(m.width)
+		if m.fileSelector != nil {
+			m.fileSelector.width = m.width
+			m.fileSelector.height = m.height
+			m.fileSelector.styles = m.styles
+		}
+		return m, nil
+
+	case tea.KeyMsg:
+		switch m.state {
+		case moveFormSelectingFile:
+			switch msg.String() {
+			case "enter":
+				if m.fileSelector != nil && len(m.fileSelector.files) > 0 {
+					selectedFile := m.fileSelector.files[m.fileSelector.selected]
+					m.state = moveFormProcessing
+					return m, m.submitMove(selectedFile)
+				}
+			case "esc", "q":
+				return m, func() tea.Msg { return moveFormCancelMsg{} }
+			default:
+				// Forward other keys to file selector
+				if m.fileSelector != nil {
+					newFileSelector, cmd := m.fileSelector.Update(msg)
+					m.fileSelector = newFileSelector
+					return m, cmd
+				}
+			}
+		case moveFormProcessing:
+			// Dans cet état, on attend le résultat de l'opération
+			// Le résultat sera géré par le modèle principal
+			switch msg.String() {
+			case "esc", "q":
+				return m, func() tea.Msg { return moveFormCancelMsg{} }
+			}
+		}
+	}
+
+	return m, nil
+}
+
+func (m *moveFormModel) View() string {
+	switch m.state {
+	case moveFormSelectingFile:
+		if m.fileSelector != nil {
+			return m.fileSelector.View()
+		}
+		return "Loading..."
+
+	case moveFormProcessing:
+		return m.styles.FormTitle.Render("Moving host...") + "\n\n" +
+			m.styles.HelpText.Render(fmt.Sprintf("Moving host '%s' to selected config file...", m.hostName))
+
+	default:
+		return "Unknown state"
+	}
+}
+
+func (m *moveFormModel) submitMove(targetFile string) tea.Cmd {
+	return func() tea.Msg {
+		err := config.MoveHostToFile(m.hostName, targetFile)
+		return moveFormSubmitMsg{
+			hostName:   m.hostName,
+			targetFile: targetFile,
+			err:        err,
+		}
+	}
+}
+
+// Standalone move form for CLI usage
+type standaloneMoveForm struct {
+	moveFormModel *moveFormModel
+}
+
+func (m standaloneMoveForm) Init() tea.Cmd {
+	return m.moveFormModel.Init()
+}
+
+func (m standaloneMoveForm) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	switch msg.(type) {
+	case moveFormCancelMsg:
+		return m, tea.Quit
+	case moveFormSubmitMsg:
+		// En mode standalone, on quitte après le déplacement (succès ou erreur)
+		return m, tea.Quit
+	}
+
+	newForm, cmd := m.moveFormModel.Update(msg)
+	m.moveFormModel = newForm
+	return m, cmd
+}
+
+func (m standaloneMoveForm) View() string {
+	return m.moveFormModel.View()
+}
+
+// RunMoveForm provides backward compatibility for standalone move form
+func RunMoveForm(hostName string, configFile string) error {
+	styles := NewStyles(80)
+	moveForm, err := NewMoveForm(hostName, styles, 80, 24, configFile)
+	if err != nil {
+		return err
+	}
+	m := standaloneMoveForm{moveForm}
+
+	p := tea.NewProgram(m, tea.WithAltScreen())
+	_, err = p.Run()
+	return err
+}