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/command/ticket_cmds.go

@@ -0,0 +1,81 @@
+package command
+
+import (
+	"context"
+	"fmt"
+
+	"task/internal/ticket"
+)
+
+// CreateTicket creates a ticket; Undo deletes it.
+type CreateTicket struct {
+	Store  ticket.Store
+	Ticket ticket.Ticket
+	created ticket.Ticket
+}
+
+func (c *CreateTicket) Name() string { return "create ticket" }
+
+func (c *CreateTicket) Execute(ctx context.Context) error {
+	_ = ctx
+	created, err := c.Store.Create(c.Ticket)
+	if err != nil {
+		return err
+	}
+	c.created = created
+	c.Ticket = created
+	return nil
+}
+
+func (c *CreateTicket) Undo(ctx context.Context) error {
+	_ = ctx
+	id := c.created.ID
+	if id == "" {
+		id = c.Ticket.ID
+	}
+	if id == "" {
+		return fmt.Errorf("create undo: missing ticket id")
+	}
+	return c.Store.Delete(id)
+}
+
+// DeleteTicket deletes a ticket; Undo restores the snapshot.
+type DeleteTicket struct {
+	Store    ticket.Store
+	Snapshot ticket.Ticket
+}
+
+func (c *DeleteTicket) Name() string { return "delete ticket" }
+
+func (c *DeleteTicket) Execute(ctx context.Context) error {
+	_ = ctx
+	if c.Snapshot.ID == "" {
+		return fmt.Errorf("delete: missing ticket id")
+	}
+	return c.Store.Delete(c.Snapshot.ID)
+}
+
+func (c *DeleteTicket) Undo(ctx context.Context) error {
+	_ = ctx
+	_, err := c.Store.Create(c.Snapshot)
+	return err
+}
+
+// UpdateTicket applies a new ticket state; Undo restores Before.
+type UpdateTicket struct {
+	Store  ticket.Store
+	Before ticket.Ticket
+	After  ticket.Ticket
+}
+
+func (c *UpdateTicket) Name() string { return "update ticket" }
+
+func (c *UpdateTicket) Execute(ctx context.Context) error {
+	_ = ctx
+	return c.Store.Update(c.After)
+}
+
+func (c *UpdateTicket) Undo(ctx context.Context) error {
+	_ = ctx
+	return c.Store.Update(c.Before)
+}