fix: use line numbers to prevent deleting all duplicate SSH hosts when removing one

internal/ui/model.go

@@ -74,14 +74,14 @@ type Model struct {
 	filteredHosts  []config.SSHHost
 	searchMode     bool
 	deleteMode     bool
-	deleteHost     string
+	deleteHost     *config.SSHHost // Host to be deleted (with line number for precise targeting)
 	historyManager *history.HistoryManager
 	pingManager    *connectivity.PingManager
 	sortMode       SortMode
 	configFile     string // Path to the SSH config file
 
 	// Application configuration
-	appConfig      *config.AppConfig
+	appConfig *config.AppConfig
 
 	// Version update information
 	updateInfo     *version.UpdateInfo

internal/ui/update.go

@@ -452,7 +452,7 @@ func (m Model) handleListViewKeys(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 		if m.deleteMode {
 			// Exit delete mode
 			m.deleteMode = false
-			m.deleteHost = ""
+			m.deleteHost = nil
 			m.table.Focus()
 			return m, nil
 		}
@@ -508,15 +508,13 @@ func (m Model) handleListViewKeys(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 		} else if m.deleteMode {
 			// Confirm deletion
 			var err error
-			if m.configFile != "" {
-				err = config.DeleteSSHHostFromFile(m.deleteHost, m.configFile)
-			} else {
-				err = config.DeleteSSHHost(m.deleteHost)
+			if m.deleteHost != nil {
+				err = config.DeleteSSHHostWithLine(*m.deleteHost)
 			}
 			if err != nil {
 				// Could display an error message here
 				m.deleteMode = false
-				m.deleteHost = ""
+				m.deleteHost = nil
 				m.table.Focus()
 				return m, nil
 			}
@@ -533,7 +531,7 @@ func (m Model) handleListViewKeys(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 			if parseErr != nil {
 				// Could display an error message here
 				m.deleteMode = false
-				m.deleteHost = ""
+				m.deleteHost = nil
 				m.table.Focus()
 				return m, nil
 			}
@@ -548,7 +546,7 @@ func (m Model) handleListViewKeys(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 
 			m.updateTableRows()
 			m.deleteMode = false
-			m.deleteHost = ""
+			m.deleteHost = nil
 			m.table.Focus()
 			return m, nil
 		} else {
@@ -673,11 +671,13 @@ func (m Model) handleListViewKeys(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 	case "d":
 		if !m.searchMode && !m.deleteMode {
 			// Delete the selected host
-			selected := m.table.SelectedRow()
-			if len(selected) > 0 {
-				hostName := extractHostNameFromTableRow(selected[0]) // Extract hostname from first column
+			cursor := m.table.Cursor()
+			if cursor >= 0 && cursor < len(m.filteredHosts) {
+				// Get the host at the cursor position (which corresponds to filteredHosts index)
+				targetHost := &m.filteredHosts[cursor]
+
 				m.deleteMode = true
-				m.deleteHost = hostName
+				m.deleteHost = targetHost
 				m.table.Blur()
 				return m, nil
 			}

internal/ui/view.go

@@ -144,7 +144,11 @@ func (m Model) renderListView() string {
 func (m Model) renderDeleteConfirmation() string {
 	// Remove emojis (uncertain width depending on terminal) to stabilize the frame
 	title := "DELETE SSH HOST"
-	question := fmt.Sprintf("Are you sure you want to delete host '%s'?", m.deleteHost)
+	hostName := ""
+	if m.deleteHost != nil {
+		hostName = m.deleteHost.Name
+	}
+	question := fmt.Sprintf("Are you sure you want to delete host '%s'?", hostName)
 	action := "This action cannot be undone."
 	help := "Enter: confirm • Esc: cancel"