refactor: serve static frontend with Go APIs

backend/internal/application/application_test.go

@@ -93,7 +93,7 @@ func TestProductionLocalBackendNeverGrantsAnonymousAdministrator(t *testing.T) {
 	}
 }
 
-func TestApplicationDerivesNextCompatibleMethodMatrixBeforeAuthentication(t *testing.T) {
+func TestApplicationDerivesLegacyCompatibleMethodMatrixBeforeAuthentication(t *testing.T) {
 	app, err := application.New(application.Options{Getenv: applicationEnv(map[string]string{
 		"NODE_ENV":             "production",
 		"ZHINIAN_DATA_BACKEND": "local",