Add offline-first task-master TUI with tickets, board lists, and undo.

Charm-based CLI with JSON persistence, status/list filters, external editor editing, command-history undo/redo, and glamour markdown without AutoStyle OSC hangs.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/ui/views/board.go

@@ -0,0 +1,66 @@
+package views
+
+import (
+	"strings"
+
+	"task/internal/ticket"
+)
+
+// BoardMenu renders a board-list picker overlay.
+type BoardMenu struct {
+	Cursor int
+	Width  int
+	Styles StatusMenuStyles
+}
+
+// NewBoardMenu creates a menu with the given board list pre-selected.
+func NewBoardMenu(current ticket.BoardList, width int, styles StatusMenuStyles) BoardMenu {
+	return BoardMenu{
+		Cursor: current.Index(),
+		Width:  width,
+		Styles: styles,
+	}
+}
+
+// MoveDown moves the selection down.
+func (m *BoardMenu) MoveDown() {
+	if m.Cursor < len(ticket.AllBoardLists)-1 {
+		m.Cursor++
+	}
+}
+
+// MoveUp moves the selection up.
+func (m *BoardMenu) MoveUp() {
+	if m.Cursor > 0 {
+		m.Cursor--
+	}
+}
+
+// Selected returns the currently highlighted board list.
+func (m BoardMenu) Selected() ticket.BoardList {
+	if m.Cursor < 0 || m.Cursor >= len(ticket.AllBoardLists) {
+		return ticket.BoardAll
+	}
+	return ticket.AllBoardLists[m.Cursor]
+}
+
+// View renders the board menu.
+func (m BoardMenu) View() string {
+	var lines []string
+	lines = append(lines, m.Styles.Title.Render("Switch list"))
+	for i, bl := range ticket.AllBoardLists {
+		label := "  " + bl.Label()
+		if i == m.Cursor {
+			label = m.Styles.Selected.Render("▸ " + bl.Label())
+		} else {
+			label = m.Styles.Normal.Render(label)
+		}
+		lines = append(lines, label)
+	}
+	body := strings.Join(lines, "\n")
+	w := m.Width
+	if w < 20 {
+		w = 20
+	}
+	return m.Styles.Box.Width(min(40, w-2)).Render(body)
+}