Allow moving tickets between projects with P.

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

internal/ticket/jsonstore_test.go

@@ -97,3 +97,33 @@ func TestJSONStoreMigratesLegacyTasksJSON(t *testing.T) {
 		t.Fatalf("legacy tasks.json should be removed, err=%v", err)
 	}
 }
+
+func TestJSONStoreMove(t *testing.T) {
+	dir := t.TempDir()
+	store := ticket.NewJSONStore(dir)
+
+	created, err := store.Create(ticket.Ticket{
+		Title:     "Misfiled",
+		ProjectID: "inbox",
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	moved, err := store.Move(created.ID, "client")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if moved.ProjectID != "client" {
+		t.Fatalf("ProjectID = %q", moved.ProjectID)
+	}
+
+	from, err := store.List("inbox")
+	if err != nil || len(from) != 0 {
+		t.Fatalf("inbox after move: %v len=%d", err, len(from))
+	}
+	to, err := store.List("client")
+	if err != nil || len(to) != 1 || to[0].ID != created.ID {
+		t.Fatalf("client after move: %v %+v", err, to)
+	}
+}