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/ticket/board.go

@@ -0,0 +1,79 @@
+package ticket
+
+// BoardList is a project-scoped view/filter over tickets by status.
+type BoardList string
+
+const (
+	BoardAll        BoardList = "all"
+	BoardBacklog    BoardList = "backlog"
+	BoardInProgress BoardList = "in_progress"
+	BoardDone       BoardList = "done"
+)
+
+// AllBoardLists is the ordered picker list.
+var AllBoardLists = []BoardList{BoardAll, BoardBacklog, BoardInProgress, BoardDone}
+
+// Label returns a display name for the board list.
+func (b BoardList) Label() string {
+	switch b {
+	case BoardAll:
+		return "All"
+	case BoardBacklog:
+		return "Backlog"
+	case BoardInProgress:
+		return "In Progress"
+	case BoardDone:
+		return "Done"
+	default:
+		return string(b)
+	}
+}
+
+// Index returns the position in AllBoardLists.
+func (b BoardList) Index() int {
+	for i, bl := range AllBoardLists {
+		if bl == b {
+			return i
+		}
+	}
+	return 0
+}
+
+// ParseBoardList validates a board list id; invalid values become BoardAll.
+func ParseBoardList(s string) BoardList {
+	b := BoardList(s)
+	switch b {
+	case BoardAll, BoardBacklog, BoardInProgress, BoardDone:
+		return b
+	default:
+		return BoardAll
+	}
+}
+
+// Matches reports whether a ticket belongs on this board list.
+func (b BoardList) Matches(status Status) bool {
+	switch b {
+	case BoardAll:
+		return true
+	case BoardBacklog:
+		return status == StatusTodo
+	case BoardInProgress:
+		return status == StatusInProgress
+	case BoardDone:
+		return status == StatusDone
+	default:
+		return true
+	}
+}
+
+// DefaultStatus is the status used when creating a ticket on this list.
+func (b BoardList) DefaultStatus() Status {
+	switch b {
+	case BoardInProgress:
+		return StatusInProgress
+	case BoardDone:
+		return StatusDone
+	default:
+		return StatusTodo
+	}
+}