Refactor: Add text input functionality

Replaces the counter with a text input field for user interaction. This
change leverages the `textinput` bubble to provide a more interactive
experience within the TUI. The `go.mod` and `go.sum` files have been
updated to include the necessary dependency.

main.go

@@ -4,49 +4,50 @@ import (
 	"fmt"
 	"os"
 
+	"github.com/charmbracelet/bubbles/textinput"
 	tea "github.com/charmbracelet/bubbletea"
 )
 
 type model struct {
-	counter int
+	textInput textinput.Model
 }
 
 func initialModel() model {
-	return model{counter: 0}
+	ti := textinput.New()
+	ti.Placeholder = "Search"
+	ti.Width = 30
+	ti.CharLimit = 30
+	ti.Focus()
+	return model{
+		textInput: ti,
+	}
 }
 
 func (m model) Init() tea.Cmd {
-	return nil
+	return textinput.Blink
 }
 
 func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	var cmd tea.Cmd
 	switch msg := msg.(type) {
-
 	case tea.KeyMsg:
 		switch msg.String() {
 		case "q", "ctrl+c":
 			return m, tea.Quit
-		case "+":
-			m.counter++
-		case "-":
-			m.counter--
 		}
 	}
-	return m, nil
+	m.textInput, cmd = m.textInput.Update(msg)
+	return m, cmd
 }
 
 func (m model) View() string {
-	return fmt.Sprintf(
-		"Counter: %d\n\nPress + / - to change\nPress q to quit\n",
-		m.counter,
-	)
+	return fmt.Sprint(m.textInput.View())
 }
 
 func main() {
-	p := tea.NewProgram(initialModel())
-	if err := p.Start(); err != nil {
+	p := tea.NewProgram(initialModel(), tea.WithAltScreen())
+	if _, err := p.Run(); err != nil {
 		fmt.Println("Error:", err)
 		os.Exit(1)
 	}
 }
-