More UX improvements.

internal/server/server.go

@@ -51,9 +51,14 @@ func (s *Server) Handler() http.Handler {
 	return mux
 }
 
-// handleCatalog returns every card in the game, for the debug panel.
-func (s *Server) handleCatalog(w http.ResponseWriter, _ *http.Request) {
-	writeJSON(w, game.Catalog())
+// handleCatalog returns every card in a pack (?pack=…, default Turtle), for the
+// debug panel. Unknown packs fall back to the default.
+func (s *Server) handleCatalog(w http.ResponseWriter, req *http.Request) {
+	pack := req.URL.Query().Get("pack")
+	if pack == "" {
+		pack = game.DefaultPack
+	}
+	writeJSON(w, game.CatalogForPack(pack))
 }
 
 // room is one live game plus its connections.