fix: serve datastar locally and clean up session/route config

Replace CDN-hosted datastar beta.11 with local v1.0.0-RC.7 to fix
client-side expression incompatibilities with the Go SDK. Also fix
quoted CSS class keys in data-class expressions, harden session cookie
settings (named cookie, Secure flag), simplify SetupRoutes to not
return an error, and regenerate templ output.

features/c4game/routes.go

@@ -16,7 +16,7 @@ func SetupRoutes(
 	nc *nats.Conn,
 	sessions *scs.SessionManager,
 	queries *repository.Queries,
-) error {
+) {
 	router.Route("/games/{id}", func(r chi.Router) {
 		r.Get("/", HandleGamePage(store, sessions, queries))
 		r.Get("/events", HandleGameEvents(store, nc, sessions, queries))
@@ -25,6 +25,4 @@ func SetupRoutes(
 		r.Post("/join", HandleSetNickname(store, sessions))
 		r.Post("/rematch", HandleRematch(store, sessions))
 	})
-
-	return nil
 }