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/ticket.go

@@ -0,0 +1,51 @@
+package ticket
+
+import "time"
+
+// Status represents the workflow state of a ticket.
+type Status string
+
+const (
+	StatusTodo       Status = "todo"
+	StatusInProgress Status = "in_progress"
+	StatusDone       Status = "done"
+)
+
+// AllStatuses is the ordered list shown in the status picker.
+var AllStatuses = []Status{StatusTodo, StatusInProgress, StatusDone}
+
+// Label returns a short display label for the status.
+func (s Status) Label() string {
+	switch s {
+	case StatusTodo:
+		return "OPEN"
+	case StatusInProgress:
+		return "WIP"
+	case StatusDone:
+		return "DONE"
+	default:
+		return string(s)
+	}
+}
+
+// Index returns the position in AllStatuses, or 0 if unknown.
+func (s Status) Index() int {
+	for i, st := range AllStatuses {
+		if st == s {
+			return i
+		}
+	}
+	return 0
+}
+
+// Ticket is the domain model for a work item.
+// Title (headline) and Description are Markdown.
+type Ticket struct {
+	ID          string    `json:"id"`
+	Title       string    `json:"title"`
+	Description string    `json:"description,omitempty"`
+	Status      Status    `json:"status"`
+	ProjectID   string    `json:"projectId"`
+	CreatedAt   time.Time `json:"createdAt"`
+	UpdatedAt   time.Time `json:"updatedAt"`
+}